B767 ATA 52 Student Book

TRAINING MANUALFOR TRAINING PURPOSES ONLY

B767-3S2F ATA 52-00 Page - 1 1/30/12 EFF - ALL

DOORSCH 52



ATA 52 DOORS TABLE OF CONTENTS

DOORS INTRODUCTION ...........................................................................4CREW ENTRY DOOR - INTRODUCTION ..................................................6LATCH MECHANISM - LATCH PIN ............................................................8CREW ENTRY DOOR - EXTERIOR HANDLE ..........................................10DOORS - RIGID BARRIER DOOR ............................................................12CARGO DOORS - INTRODUCTION .........................................................14MAIN DECK CARGO DOOR - INTRODUCTION .......................................16MAIN DECK CARGO DOOR - COMPONENTS - OUTSIDE .....................18MAIN DECK CARGO DOOR - COMPONENTS - INTERIOR ....................20MAIN DECK CARGO DOOR - CONTROL SWITCHES .............................22MAIN DECK CARGO DOOR - LOCK MECHANISM ..................................24MAIN DECK CARGO DOOR - LATCH MECHANISM ...............................26MAIN DECK CARGO DOOR - LATCH/HOOK POWER UNIT ..................28MAIN DECK CARGO DOOR - LIFT POWER UNIT ...................................30

MAIN DECK CARGO DOOR - ROTARY ACTUATOR ..............................32MAIN DECK CARGO DOOR - PROXIMITY SENSORS ............................34MAIN DECK CARGO DOOR - ELECTRICAL OPERATION ......................36MAIN DECK CARGO DOOR - FUNCTIONAL DESCRIPTION ..................38MAIN DECK CARGO DOOR - MANUAL OPERATION .............................42CARGO DOORS - INTRODUCTION .........................................................44LOWER CARGO DOOR - INTRODUCTION .............................................46LOWER CARGO DOOR - COMPONENT LOCATION - INSIDE ...............48LOWER CARGO DOOR - LOCK HANDLE MECHANISM ........................50LOWER CARGO DOOR - CONTROL SWITCHES ...................................52LOWER CARGO DOOR - LATCH/HOOK .................................................54LOWER CARGO DOOR - LIFT POWER UNIT ..........................................56LOWER CARGO DOOR - FUNCTIONAL DESCRIPTION ........................58LOWER CARGO DOOR - MANUAL OPERATION ....................................60BULK CARGO DOOR SYSTEM - INTRODUCTION ..................................62BULK CARGO DOOR SYSTEM - COMPONENT LOCATION ...................64BULK CARGO DOOR SYSTEM - OPERATING MECHANISM .................66BULK CARGO DOOR SYSTEM - OPERATION...... ..................................68DOOR WARNING SYSTEM - INTRODUCTION .......................................70DOOR WARNING SYSTEM - INDICATIONS ............................................72



STUDENT NOTES:



DOORS - INTRODUCTION

General Description

These are the types of doors:

- Crew entry door- Cargo door.

There is a door warning system that gives door status information to the flight crew.

Abbreviations and Acronyms

AC - alternating currentADP - air-driven pumpAPU - auxiliary power unitARINC - Aeronautical Radio, Inc.aux - auxiliarycm - centimeterDC - direct currentECS - environmental control systemEICAS - engine indication and crew alerting systemE/E - electrical and electronicfwd - forwardgnd - groundhdlg - handlingHZ - hertzinbd - inboardMEC - main equipment centeroutbd - outboardPDU - power drive unitpnl - panelPSI - pounds per square inchPSEU - proximity sensor electronics unitpwr - powerref - referenceRPM - revolutions per minuteV - volt



DOORRIGID BARRIER

CREW ENTRY DOOR

MAIN DECKCARGO DOOR(REF)

DOORS - INTRODUCTION



CREW ENTRY DOOR - INTRODUCTION

General Description:

There is one crew entry door on the airplane which can be operated manually from inside or outside. The door opens inward and upward to a position inside the fuselage. The door is guided by rollers inside the upper and side tracks. A counterbalance above the ceiling gives the force to allow the door to be liftedto the open position.

The door has these major components:

- Handle mechanism- Interior handle- Secondary capture lever- Hydraulic snubber- Overcenter mechanism- Latch torque tube- Latch pin tube- Latch cam- Trolley- Side track (2)



TROLLEY

SPRING HYDRAULICSNUBBER

OVERCENTERMECHANISM

INTERIOR HANDLE

HANDLE MECHANISM

SECONDARYCAPTURE LEVER

SIDE TRACK(2)

LATCH TORQUETUBELATCH CAM CABLE

LATCH PIN

CREW ENTRY DOOR

CREW ENTRY DOOR(EXAMPLE)

CREW ENTRY DOOR - INTRODUCTION



LATCH MECHANISM - LATCH PIN

Purpose

The latch pin lets you latch and lock the door.

Physical Description

The latch pin assembly has these components:

- Entry door locked proximity sensor- Latch pin push-pull cable- Latch pin push-pull cable connection- Guide roller- Latch pin.

Functional Description

The interior handle attaches to the door handle shaft. The latch pin push-pull cable connection is part of the door handle shaft. The latch pin push-pull cableattaches to the latch pin. The latch pin moves behind the guide roller to lock it in place closed.

When the latch is closed, the target for locked are near. When the latch pin is in the open position, the target for locked are far and causes door warning onthe flight deck.



INTERIORDOOR HANDLE

DOOR HANDLE SHAFT

LATCH PINPUSH-PULLCABLE CONNECTION

ENTRY DOORLOCKED PROXSENSOR

ENTRY DOORCLOSED PROXSENSOR

GUIDE ROLLER

TARGETLATCH PINPUSH-PULLCABLE

(TARGETS NEAR)

(TARGETS FAR)

DOOR CLOSED & LOCKED

DOOR OPEN

LATCH PIN

LATCH MECHANISM - LATCH PIN



CREW ENTRY DOOR - EXTERIOR HANDLE

General

The crew entry door exterior handle is located forward of the door. The exterior handle connects to the interior handle through the handle support. Pushing inthe exterior primary capture lever, puts the handle in an uncaptured position. The exterior handle is lifted to unlock and unlatch the door.


The exterior door handle mechanism has these components:

- Exterior handle- Primary capture lever- Capture lever finger extension- Capture system external lock- Stop bolt

Door Open Operation

To open the crew entry door externally, you must push the external primary capture lever fully to the uncaptured position. Slowly move the exterior handle to the unlatched position and lift the door up until the uplatch is engaged. Rotate the release roller located under the exterior handle in the required direction,then lower the handle to the faired position.

Note: The external primary capture lever stays in the uncaptured (inboard) position.

Door Close Operation

To close the crew entry door externally, make sure the interior handle is in the open (unlatched) position. Move the handle to the open position if necessary. Make sure the red external primary capture lever is in the fully captured position and the exterior handle is unlatched. If the interior handle is not open and the primary capture lever is not fully captured, you cannot close the door. Lower the crew entry door and move the exterior handle down to the faired position.

Note: The red external primary capture lever is pulled into the fully faired position when the secondary capture lever handle is moved to the captured position.

WARNING: WARNING: MAKE SURE THE AREA OF THE MOVEMENT FOR THE INTERIOR HANDLE IS CLEAR. THE INTERIOR HANDLE WILL MOVE DOWN WHEN THE DOOR IS CLOSED. THE SUDDEN MOVEMENT OF THE INTERIOR HANDLE CAN CAUSE INJURY TO PERSONS IN THE AIRPLANE.



FWD

LEVERCAPTUREPRIMARY

OF CAPTURE LEVERFINGER EXTENSION

(VIEW LOOKING INBOARD)

EXTERIORHANDLE

INBD

PRIMARYCAPTURE

STOP BOLT

CAPTURE SYSTEMEXTERNAL LOCK BASE

HANDLE

(REF)

LEVER

BOX

STOP BOLT

CAPTURE

LOCKEXTERNALSYSTEM

HANDLEEXTERIOR

CREW ENTRY DOOR(EXTERIOR VIEW)

CREW ENTRY DOOR - EXTERIOR HANDLE



DOORS - RIGID BARRIER DOOR

Purpose

The rigid barrier door gives access to the main deck cargo compartment from the flight deck.

Location

The door is located inboard of the crew entry door in the left aft corner of the flight deck. It enters the main deck cargo compartment at the forward left sidethat is forward of the main deck cargo loading door.


The door has two handles, one on the flight deck side and one on the main cargo compartment side. The door also has a small view window to view the main deck cargo compartment.

Operation

The rigid barrier door opens into the flight deck on a fixed hinge. Turn the handle clockwise to unlock the door and counter-clockwise to lock the door. The door has three latch pins. When you turn the handle clockwise the three latch pins are retracted from the rigid barrier wall.



RIGID BARRIER WALL

RIGID BARRIER DOOR

LATCH PIN

PRESSURERELIEFDOOR

VIEWWINDOW

RIGID BARRIERDOOR LATCH PIN(3)

RIGID BARRIER DOORRIGID BARRIER WALL

RIGIDBARRIERWALL RIGID

BARRIERDOOR

LATCH PIN

DOORS - RIGID BARRIER DOOR



CARGO DOORS - INTRODUCTION

Purpose

Cargo doors give access to these cargo compartments:

- Main deck- Forward- Aft- Bulk.

Location

The main deck cargo door and bulk cargo door are on the left side. The forward and aft cargo doors are on the right side.

General Description

The main deck cargo door lets the crew load cargo on pallets or in containers on the main deck. The forward cargo door lets the crew load cargo on pallets or containers into the forward cargo compartment.

The aft cargo door lets the crew load containerized cargo only into the aft cargo compartment. The bulk cargo door lets the crew load small, odd size cargo and animals that are not in containers or pallets.



SAFETY STRAPCARGO DOORMAIN DECK

ELECTRICAL ANDELECTRONICSACCESS DOOR

CREW ENTRYDOOR

MAIN DECKCARGO DOOR

FORWARDCARGO DOOR

BULKCARGO DOOR

AFTCARGO DOOR




MAIN DECK CARGO DOOR -- INTRODUCTION

General Description

The main deck cargo door has an opening 134 inches wide and 103 inches high. The dimensions of the door let cargo handlers load and unload pallets and containers. The door is a non-plug type of door. Door latches holdthe door closed against cabin pressure loads.

The door opens outward and upward. It is operated electrically from the crew entry doorway. It can also be operated manually from outside the cargocompartment.

Location

The main deck cargo door is forward of the wing. It is on the left side of the airplane.



(LOOKING FROM INSIDE)

100 IN.

HEIGHT2 IN. ROLLER

LEVELFLOOR

LEVELROLLER

134 IN.

108 IN.

103 IN.

MAIN DECK CARGO DOOR -- INTRODUCTION



MAIN DECK CARGO DOOR - COMPONENTS - OUTSIDE

Components on the Outside of the Door

There are three manual drive sockets.

The manual drive sockets are at these locations:

- Lower middle (exterior side of the door)- Aft edge (exterior side of the door)- Aft of door cut out in fuselage.

There are 12 witness ports along the bottom edge of the door.

There are 10 component access panels.

Two vent doors make sure that the fuselage is not pressurized prior to opening the door.

Training Information Point

The lock actuator connects to the lock and vent mechanism on the inside of the door. It is operated electrically from the P100 panel. The panel is located at the crew entry door. It is operated manually through the manual drive socket located towards the aft side of the door.

The lower middle manual drive socket is for manual operation of the latch/hook mechanism. It connects to the latch/hook manual drive on the inside of the door.The aft manual drive socket is for manual operation of the lift hinge mechanism. It connects to the lift manual drive on the inside of the door.

The witness ports let you visually make sure the door is latched and locked.

The access panels give access to the failed components if the cargo door is not open.



LIFT ARM BOLTACCESS PANEL (2)

MID SPAN LATCHACCESS PANEL (2)

LATCH VIEWPORT (12)

LATCH/HOOKACTUATOR MANUALDRIVE PORT

HINGE

LOCK ACTUATORMANUAL DRIVE PORT

LOCK ACTUATORACCESS PANEL

LATCH/HOOKACCESS PANEL (6)

VENTDOOR (2)

LIFT ACTUATORMANUAL DRIVE PORT

FWD

MAIN DECK CARGO DOOR - COMPONENTS - OUTSIDE



MAIN DECK CARGO DOOR - COMPONENT LOCATION - INTERIOR

Components on the Inside of the DoorThe lock actuator is located on the aft side of the door.

The two lift mechanisms are near the upper forward and the upper aft corners of the cargo door.

The four rotary actuators are near the upper forward and upper aft corners.

The lift power unit is near the top center part of the cargo door.

The latch/hook power unit is on the lower part of the door, near the center.

The latch mechanism goes from the latch/hook power unit to the pull-in hooks, mid-span latch, and latch cams.

Two pull-in hooks are at the forward and aft edges of the door.

Twelve latch cams are near the bottom of the door.

The lock mechanism goes from the lock actuator to the lock sectors. The lock sectors are on the twelve latch cams at the bottom of the door. The mechanism also goes to the two vent doors.

The graphic does not show the location of the proximity sensors that do control functions. Their locations are shown at the component level.

General Description

This section describes the function of the components on the inside of the door as the door goes from the fully open position to the closed, latched, and lockedposition.

The motor in the lift power unit supplies the torque to move the door. The torque goes through the drive shafts to the rotary actuators. The torque from the rotaryactuators goes to the lift mechanism. The lift mechanism raises or lowers the door.

Electric power shifts from the lift power unit to the latch/hook power unit when a proximity sensor senses the door is completely lowered. Torque goes from thelatch/hook power unit to the pull-in hooks. The pull-in hooks around the pull-in pins on the door cutout move to pull the door into the latch position.

After the door is pulled in, torque goes from the latch/hook power unit to all the latch cams. The cams turn around the latch pins latching the door. When aproximity sensor senses the door is latched, electric power is removed from the power unit.

The lock actuator on the door interior moves to the lock position. This locks the door. The lock action causes these actions to occur:

- Lock mechanism locks the main latch cams at the bottom of the door- Lock mechanism holds the vent doors closed.



TORQUEVENT DOOR

LOCKLOCK SECTORTORQUE TUBE

VENT

LOCK

TUBE

PULL-INHOOK

ACTUATOR

DOORS

SECTORFWD

LIFT POWER DRIVEUNIT AND GEARBOXAND BRAKE ASSEMBLY

ROTARY ACTUATORAND LIFT ARM ANDLIFT LINK

LIFT POWERDRIVE UNIT

FWD GEARBOXAND BRAKEASSEMBLY

AFT GEARBOXAND BRAKEASSEMBLY

TORQUETUBE

LIFT ARM

ROTARY ACTUATOR

LIFT LINK

MAIN DECK CARGO DOOR - COMPONENT LOCATION - INTERIOR



MAIN DECK CARGO DOOR - CONTROL SWITCHES

Purpose

Control switches let you operate the door electrically.


The open and close toggle type door control switches are spring-loaded.


The switches let you operate the door electrically.


The lock actuator can be verified in the locked position by using the test point (TP) on the P100 panel. When the lock actuator is fully extended, the TP is connected to airplane ground. There should be low resistance between the TP and the airplane frame if the actuator is locked.



P100

P100

MAIN DECKCARGO DOOR CONTROL

LIGHTS

ENTRY

W

WW

GROUND

AREACARGO

SERVICE

LOCK

UNLOCK

CLOSE

OPEN

TP

b

g

UNLOCKED

LOCKED

CLOSED

LATCHED

OPENEDb

g

g

LOCK ACTUATOR

TEST POINTEXTENDED (LOCKED)

(REF)SERVICE

LIGHTSENTRY CARGO

AREA (REF)

GROUND

OPEN/CLOSESWITCH

LOCK/UNLOCKSWITCH

DOOROPENED/CLOSED/

INDICATION

DOORLOCKED/UNLOCKEDINDICATION

ENTRY DOORLEFT FORWARD

LATCHED

(REF)

FWD

MAIN DECK CARGO DOOR - CONTROL SWITCHES



MAIN DECK CARGO DOOR - LOCK MECHANISM

Purpose

The lock mechanism holds the large cargo door latch cams in the latched position and the vent doors closed.


The lock mechanism has these components:

- Bellcranks- Torque tubes- Push rods- Vent door torque tube- Master latch lock torque tube- Lock sectors.


The lock mechanism does these things when the door lock/unlock actuator is energized to the lock position:

- Transmits the movement of the lock actuator to the lock sectors- The lock sectors move to a position that will not allow the latch cams to turn.- Transmits the movement of the lock actuator to the two vent doors to keep

them closed.



DOOR LOCKED

MASTER LATCHLOCK TORQUE TUBE

LOCK SECTORS

TORQUE TUBEVENT DOORS MASTER LATCH

LOCK TORQUE TUBE

LOCK ACTUATOR

ACTUATORLOCK

MID-SPANLATCH PUSH-ROD

FWD

ACTUATORLOCK

FWD

MAIN DECK CARGO DOOR - LOCK MECHANISM



MAIN DECK CARGO DOOR - LATCH MECHANISM

Purpose

The latch mechanism transmits torque from the latch/hook power unit to the latch cams and pull-in hooks.


The mechanism has these components:

- Torque tubes- Push rods- Bellcranks- Pull-in hooks- Mid span latch cams- Latch cams.


The torque tubes transmit torque to the latch cams. The push rods and bellcranks transmit torque from the torque tube to the pull-in hooks and the mid span latch cams.



PULL-IN

LATCH CAMS

MID SPAN

(2 OF 12)

PUSH RODS

BELLCRANKS

(1 OF 2)LATCH

HOOK

FWD

MAIN DECK CARGO DOOR - LATCH MECHANISM



MAIN DECK CARGO DOOR - LATCH/HOOK POWER UNIT

Purpose

The latch/hook power unit supplies torque to these components:

- Latch cams- Mid span latch cams- Pull-in hooks.


The latch/hook power unit has these components:

- Latch/hook torque tube- Electromechanical actuator- Electrical power connection- Three phase 115v ac motor.


The motor supplies torque to the electromechanical actuator. The actuator supplies torque to the latch/hook torque tube. The torque tube rotates thelatch cams and then the pull-in hooks.



TORQUE TUBES (2)

POWER UNIT

LATCH/HOOK

LATCH/HOOK

MOTOR

INBD

MAIN DECK CARGO DOOR - LATCH/HOOK POWER UNIT



MAIN DECK CARGO DOOR - LIFT POWER UNIT

Purpose

The lift power unit supplies power to open and close the door.


The lift power unit has these components:

- Three-phase 115v ac motor- Gear box- Two drive shafts.


The electric motor supplies torque through the gearbox and two drive shafts to the two rotary actuators.



DRIVE UNITLIFT POWER

LIFT POWER DRIVE UNIT ANDGEARBOX AND BRAKE ASSEMBLY

LIFT ARM AND LIFT LINK (EXAMPLE)ROTARY ACTUATOR AND

ROTARY ACTUATOR


LIFT ARM ANDLIFT LINK

GEARBOX ANDBRAKE ASSEMBLY

MAIN DECK CARGO DOOR

FORWARD

AND BRAKEASSEMBLY

GEARBOXAFT GEARBOXAND BRAKEASSEMBLY

LIFT ARM

TORQUETUBE

ACTUATORROTARY

MAIN DECKCARGO DOOR(REF)

LINKLIFT

A

B

SEE B

SEE BSEE A

SEE A

FWD

FWD

FWD

MAIN DECK CARGO DOOR - LIFT POWER UNIT



MAIN DECK CARGO DOOR - ROTARY ACTUATOR

Purpose

The four rotary actuators transmit torque from the lift power unit torque tubes to the door lift mechanisms.


The actuator has these parts:

- Coupling (to the lift drive mechanism)- Three planetary gear stages (internal)- Vibration damper (internal)- No-back brake (internal).


The gears of the actuator decrease the rotation rate from the lift power unit. The coupling transmits torque into the lift mechanism.

The no-back brake inside each actuator stops door movement in either direction when you remove power from the lift power unit.


The vibration damper stops the loud vibration noise that comes from the main deck cargo door lift system when closing the cargo door.

The loud vibration noise is due to a change in the manufacturing process of the rotary actuator. When closing the cargo door, a vibration starts by thealternate lock and unlock of the brake disks in the rotary actuators. This makes a vibration. The vibration is transmitted through the torque tubes and makes aloud noise. This loud noise does not mean there is damage. It does not cause bad door operation.



POWER

ROTARY ACTUATOR

VIBRATION

SHAFTDRIVE

DAMPER

GEARBOX ANDBRAKE ASSEMBLY

ROTARY ACTUATOR


LIFT ARM ANDLIFT LINK


(4)

FWD

MAIN DECK CARGO DOOR - ROTARY ACTUATOR



MAIN DECK CARGO DOOR - PROXIMITY SENSORS

Purpose

Proximity sensors supply door and door mechanism position information to the proximity sensor electronics unit (PSEU) for door operational controland door status indications.


The sensors are electrical devices that work with metal targets.


These sensors are for door operation control:

- Door up- Door latched- Door unlatched- Door locked- Door unlocked- Door closed- Door open.

The door status indication sensors are door closed, door opened, door latched, door unlocked, and door locked.

Each sensor has a target. The sensor senses if the target is near or far. The position information goes to the PSEU.



DOOR CLOSEDSENSOR

DOOR LOCK ENABLESENSOR

DOOR LOCKEDSENSOR

DOOR UNLOCKEDSENSOR

DOOR LATCHEDSENSOR

DOOR UNLATCHEDSENSOR ARM

LIFTARM

DOOR UPSTOP

DOOR OPENCONTROLSENSOR

DOORDOWNSTOP

DOORDOWNCONTROLSENSOR

LIFT

DOOR LOCKEDCONTROL SENSOR

VENTDOOR

TORQUE TUBELATCH/HOOK

DOOR LOCK ENABLESENSOR

DOOR CLOSEDSENSOR

MAIN DECK CARGO DOOR - PROXIMITY SENSORS



MAIN DECK CARGO DOOR - ELECTRICAL OPERATION

General

The large cargo door uses power from the ground handling bus for electric operation.

WARNING: WARNING: DO NOT OPERATE THE DOOR IN WINDS MORE THAN 40 KNOTS. DO NOT LET THE DOOR STAY OPEN IN WINDS MORE THAN 65 KNOTS. INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR. WARNING: DO NOT OPEN THE DOOR WHEN THE AIRPLANE IS PRESSURIZED. INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR

.Controls

The main deck cargo door control switch is on the P100 panel.

Displays and Indications

Indication lights on the P100 main cargo door control panel supply door operation information.

Witness ports on the door let you see the position of the latch cams and lock sectors.

Unlock Operation

Move the LOCK switch to unlock the cargo door. If the vent door opens, the cargo door is unlocked. The door closed light on the P100 panel is on. Cargo door electric operation is enabled.

Unlatch and Open Operation

To unlatch the door, move the OPEN switch to the open position.

Continue to hold the cargo door control switch in the open position. The door moves to the full up position. When it stops, the blue door open light on the P100 panel comes on.

Close and Latch Operation

Move the CLOSE switch to the closed position. The blue door open light on the P100 panel goes off when the door leaves the full up position.

Continue to hold the switch in the closed position. The door goes to full down position. Then it latches and the door closed light on the P100 panel comes on.

Lock Operation

Hold the LOCK switch to the lock position. Make sure that the vent doors close. The door is locked if the vent doors are closed and the green locked light on theP100 panel is on.



P34 APU/EXT PWR PNL

MAIN CARGODR LOCK CB

115V ACGND HDLGBUS

MOTOR

LOCKEDBRAKE

UNLOCKEDUNLOCKED

LOCK

UNLOCK

TP

NOT LATCHED

LATCHED

P100 MAIN CARGO DOOR

DOOR LOCKMAIN CARGO

MAIN CARGODR UNLOCKED

S898 MAIN CARGO DOORLOCK ENABEL SWITCH

LOCK ACTUATOR

THERMALPROTECTOR

CONTROL PANEL

B

MAIN DECK CARGO DOOR - ELECTRICAL OPERATION



MAIN DECK CARGO DOOR - FUNCTIONAL DESCRIPTION

General

The main deck cargo door is operated electrically with the unlock/lock switch and the open/close switch on the P100 panel. The P100 panel is located in the crew entry doorway. Indicator lights provide status informationto the door operator.

When the door is fully open or closed, proximity sensors remove power from the actuators.

Opening Electrical Operation

Here is the list of events that open the main cargo door when it is closed, latched, and locked:

When the door is closed, latched, and locked, the three green CLOSED, LATCHED, and LOCKED lights will be on and the two blue OPENED and UNLOCKED lights will be off (P100).

When the UNLOCK/LOCK switch is moved to the UNLOCK position, 115vac is supplied to the lock actuator through the lock enable sensor. The lock actuatorretracts which turns the lock torque tube. Rotation of the lock torque tube turns the twelve lock sectors freeing the latch cams for rotation. As the lock sectormoves away from the door locked warning sensor, the MAIN CARGO DOOR caution level message will appear on EICAS. Linkage from the lock torque tube turns the vent door torque tube opening the vent doors and relievingcompartment pressure before the door is opened. As the aft vent door moves away from the fully closed position, the door locked control sensor causes thedoor LOCKED light to turn off.

When the lock sectors are fully retracted, the unlatch control sensor and the door unlocked control sensor provide control power to the latch/hook power drive unit through the energized latch relay circuit.

When the OPEN/CLOSE switch is moved to the OPEN position, 115vac is supplied to the latch/hook power drive unit through the energized latch relay. The latch/hook power drive unit turns to rotate the latch/hook torque tubes. When the torque tube turns away from the latched position, the latched control

sensor opens. The latched control sensor, the door down control sensor, and the door unlocked control sensor continue to energize the latch relay. The relay stays energized until the latch/hook torque tube moves to the unlatched position and the door down control sensor indicates the door is not down. Because the latch relay stays energized until the door unlatches and moves from the down position, you can reverse the latch operation of the door at any point thereafter. When the latch mechanism rotates from the latched position, the lock enable control sensor will toggle and prevent power to the lock actuator. As the pull-in hooks rotate from the latched position, the door will move outboard and open the door closed control and warning sensors. The door latched control sensor will also open. The open door closed sensor will cause the door CLOSED light to go off (P100). The opendoor latched sensor will cause the door LATCHED lightto go off (P100).

When the latch mechanism reaches the unlatched position, the unlatch sensor closes. The closed unlatched control sensor de-energizes the unlatch sideof the latch relay. The closed unlatch sensor and the open door control sensor energize the hinge up relay, providing 115vac power to the lift power drive unit.The door down sensor opens as the lift arms of the rotary actuators move away from the door down control sensor. The open door down sensor de-energizes the latch side of the latch relay and removes power from the latch/hook actuator. The open door down sensor and the closed unlatched sensor energize the hinge down relay and enable door operation to be reversed. During the door opening cycle, the brake unit of the gearbox and brake assembly ratchets freely, offering no resistance to door movement.

When the door reaches the full up position, the door open sensor closes to remove power from the lift power drive unit. The closed door open sensor also turns on the door OPEN light (P100). The hinge down relay stays energized as long as the door is not down and is unlatched. This allows you to close the door at any point during the opening operation.

Note: If one rotary actuator arm leads the other as the door opens, the leading arm will contact its upstop. Slip clutches in the power unit will allow the lagging arm to contiue to drive until its sensor shuts off power to the power unit.



DOOR DOWNS879 MAIN CARGO

LATCH/HOOK

CLOSEOPEN

OPENED

DOOR HINGEMAIN CARGO

DOOR - CONTROLMAIN CARGO

fafbfc

fa

fb

fc

BRAKE

LIFT POWER

OFF

LATCHED

LOCKED

DOOR LOCKEDS896 MAIN CARGO

S895 MAIN CARGODOOR CLOSED

DOOR LATCHEDS884 MAIN CARGO

DOOR UNLOCKS883 MAIN CARGO

DOOR OPENS881 MAIN CARGO

DOOR UNLATCHS882 MAIN CARGO

28V DCGND HDLGBUS

GND HDLG115V AC

BUSMAIN CARGODOOR

CARGO DOORCONT

fafb

P100 MAIN CARGO DOOR CONT PNL

28V DC

HINGE PDU RAISE ENABLE

DOOR OPEN

DOOR LATCHED

DOOR CLOSED

DOOR LOCKED

UNLATCH ENABLELATCH PDU

PROXIMITY SWITCH

P34 APU/EXT PWR

MAIN CARGODOOR LATCH

MAIN CARGODOOR HINGE

HINGE PDU LOWER ENABLE

LATCH PDU

CLOSED

fc

ELECTRONICS UNIT

REDBLU

LATCH ENABLE

REDBLU

REDBLU

REDBLU

REDBLU

REDBLU

REDBLU

ACTUATOR

DRIVE UNIT

BRAKE

BRAKE

DOWN

UP

(OFF)

LOCK

UNLOCK

CLOSE

OPEN

P100

LOCKED

UNLOCKED

LATCHED

CLOSED

OPENED

MAIN DECK CARGO DOOR CONTROL

(OFF)

G

G

G

B

MAIN DECK CARGO DOOR - FUNCTIONAL DESCRIPTION



MAIN DECK CARGO DOOR - FUNCTIONAL DESCRIPTION (CONT’D)

Closing Electrical Operation

Beginning with the main deck cargo door fully open, here is the list of events to close the door:

When the control switch is placed in the CLOSE position, power is provided through the energized hinge down control relay to the lift power drive unit toclose the door. As the door moves away from the full up position, the door up sensor opens to energize the hinge up control relay. This will permit door operation to be reversed at any time. The door OPEN light (P100) will go off when the door open sensor opens.

During the door closing cycle, the pawls of the gearbox and brake assemblies engage ratchet teeth on the brake housing to prevent rotation. This forces the lift power drive unit to drive against slipping brake disks to close to door. This equalizes the power required to open and close the door, and ensures that the door will remain in position if power is lost or a failure occurs.

When the pull-in hooks contact the hook pins on door closing, door movement is stopped, but the lift power drive unit contiues to operate until the door downsensor closes. This energizes the latch side of the latch relay. Overtravel of the lift mechanism is provided by slip-joints in the lift links. After door movement is stopped, rotation of the rotary actuator lift arm causes the lift links to extend at the lift slip joints.

If the latch cams are not in the fully open position as the door closes, flanges on the mid-span latch cams contact the latch pins and hold the door open toprevent engagement of the hooks with the hook pins. The lift mechanism will continue to operate because of the slip-joint in the rotary actuator lift links, and the hooks will rotate to the closed position even though the hooks do not engage the pull-inhook pins.

The closed door down sensor will remove power from the lift power drive at the de-energized hinge down relay. Power is supplied to the latch/hook actuator through the latch relay. The latch/hook actuator will turn the latch hook torque tube, which then turns the pull-in hooks to pull the door flush with the fuselage. As the latch/hook torque tube rotates from the unlatched position, the unlatch side of the latch relay energizes to permit door operation to be reversed at any

time. As the pull-in hooks close the door, the lift links are compressed at the slip-joint to a point within the limits of slip to unload the link. As the hooks pull the door to the fully closed position, the main latch cams and mid-span latch camsturn to engage the latch pins and latch cams to hold the door closed. When the door is flush with the fuselage, the door closed sensor is closed and the doorCLOSED light on the P100 will come on. When the latch/hook torque tube turns to the latched position, the latch side of of the latch relay is de-energized and power is removed from the latch/hook actuator. The lock enable control sensor is also closed to allow power to the lock actuator when the UNLOCK/LOCK switch is moved to the LOCK position. The closed door latched sensor will send a signal to turn the door LATCHED light on (P100).

When the UNLOCK/LOCK switch is moved to the LOCK position, the lock sectors extend to block the latch cams to lock them closed. As the lock sectors extend, the door unlock sensor opens to prevent electrical unlatching and opening of the door.

When the vent doors turn and close to the fully closed position, the door locked sensor closes to turn on the door LOCKED light on the P100.

The door warning system gets signals from the door closed, the door latched, and the door locked sensors. When the door is closed, latched, and locked, the MAIN CARGO DOOR caution message does not show on EICAS.



MAIN DECK CARGO DOOR - FUNCTIONAL DESCRIPTION (CONT’D)

DOOR DOWNS879 MAIN CARGO

LATCH/HOOK

CLOSEOPEN

OPENED

DOOR HINGEMAIN CARGO

DOOR - CONTROLMAIN CARGO

fafbfc

fa

fb

fc

BRAKE

LIFT POWER

OFF

LATCHED

LOCKED

DOOR LOCKEDS896 MAIN CARGO

S895 MAIN CARGODOOR CLOSED

DOOR LATCHEDS884 MAIN CARGO

DOOR UNLOCKS883 MAIN CARGO

DOOR OPENS881 MAIN CARGO

DOOR UNLATCHS882 MAIN CARGO

28V DCGND HDLGBUS

GND HDLG115V AC

BUSMAIN CARGODOOR

CARGO DOORCONT

fafb

P100 MAIN CARGO DOOR CONT PNL

28V DC

HINGE PDU RAISE ENABLE

DOOR OPEN

DOOR LATCHED

DOOR CLOSED

DOOR LOCKED

UNLATCH ENABLELATCH PDU

PROXIMITY SWITCH

P34 APU/EXT PWR

MAIN CARGODOOR LATCH

MAIN CARGODOOR HINGE

HINGE PDU LOWER ENABLE

LATCH PDU

CLOSED

fc

ELECTRONICS UNIT

REDBLU

LATCH ENABLE

REDBLU

REDBLU

REDBLU

REDBLU

REDBLU

REDBLU

ACTUATOR

DRIVE UNIT

BRAKE

BRAKE

DOWN

UP

(OFF)

LOCK

UNLOCK

CLOSE

OPEN

P100

LOCKED

UNLOCKED

LATCHED

CLOSED

OPENED

MAIN DECK CARGO DOOR CONTROL

(OFF)

G

G

G

B



MAIN DECK CARGO DOOR - MANUAL OPERATION

General

Use a 3/8-inch drive tool for manual door operations.

WARNING: DO NOT OPERATE THE DOOR IN WINDS MORE THAN 40 KNOTS. DO NOT LET THE DOOR STAY OPEN IN WINDS MORE THAN 65 KNOTS. INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.

WARNING: DO NOT OPEN THE DOOR WHEN THE AIRPLANE IS PRESSURIZED. INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.

Controls

The manual system has three manual drive sockets. The first is the unlock actuator drive socket at the aft edge of the door. The second is the latch actuator drive socket at the bottom middle of the door. The third is the lift mechanism drive socket located just aft of the door in the fuselage.

CAUTION: LIMIT MANUAL DRIVE INPUT TORQUE TO LATCH/HOOK ACTUATOR TO 130 POUND-INCHES. LIMIT POWER TOOL SPEED TO 500 RPM OR LESS. WHEN MANUALLY OPERATING POWER UNIT, STOP CONTACT IS FELT BY A SUDDEN TORQUE RISE WHICH IS NOT TO EXCEED 130 POUND-INCHES. IF ACTUATOR CLUTCH SLIPPAGE TIME EXCEEDS 5 SECONDS, DAMAGE TO SLIP CLUTCH MAY OCCUR.

Indications

Witness ports along the bottom edge of the door are used to see if the door is latched and locked. Unlock and Unlatch Operations Manually turn the lock actuator. If the vent doors open, the door is unlocked. Insert the drive tool into the latch manual drive socket. Turn clockwise 115 turns. The door is unlatchedwhen it moves outboard to where it can move freely a small distance inboard and outboard.

Note: The lower edge of the door should move about 3 inches outboard.

Lift and Lower Operation

CAUTION: CAUTION: DO NOT LET THE POWER DRIVE UNIT OPERATE WITH TORQUE LIMITER SLIPPAGE FOR MORE THAN 5 SECONDS. DAMAGE TO THE POWER DRIVE UNIT CAN OCCUR. DO NOT OPERATE MANUAL DRIVE AT A SPEED FASTER THAN 500 RPM OR A TORQUE MORE THAN 190 POUND-INCHES.

Insert the drive tool into the lift manual drive socket aft of the door. Rotate counterclockwise until the door is in the full up position, 1280 full turns.

Note: A pause at the low point of door travel is normal.

Reverse the operations to lower the door.

Latch and Lock Operation

Insert the drive tool in the latch manual drive socket. Turn it in the latch direction. The door will latch.


The door must be unlatched before you lift the door with the lift manual drive socket.

The door must be full down before you can latch the door with the latch manual drive socket.



ACTUATORLATCH/HOOK


LIFT MANUAL DRIVE GEARBOX

LIFT MANUALDRIVE GEARBOX


ACTUATORLOCK

FWD

FWD

FWD

MAIN DECK CARGO DOOR - MANUAL OPERATION




Purpose

Cargo doors give access to the main deck, forward, aft,and bulk lower lobe cargo compartments.Location

The forward and aft lower cargo doors are on the rightside. The main deck cargo door and bulk cargo door areon the left side.

General Description

The aft cargo door lets the crew load cargo containersonly.

The bulk cargo door lets the crew load small, odd sizecargo and animals that are not in containers or onpallets.





CREW ENTRYDOOR

MAIN DECKCARGO DOOR

FORWARDCARGO DOOR

BULKCARGO DOOR

AFTCARGO DOOR




LOWER CARGO DOOR - INTRODUCTION

General Description

The large cargo door has an opening of 134 inches wide, and 69 inches high. The dimensions of the door lets cargo handlers load and unload pallets and containers.

The door a is non-plug type of door. Door latches hold the door closed against cabin pressure loads.

The door opens outward and upward. You can operate it electrically from outside or inside the cargo compartment. You can operate it manually from outside the cargo compartment.

Location

The large cargo doors are forward and aft of the wing on the right side of the airplane.



(LOOKING FROM INSIDE)

FWD

LOWER CARGO DOOR - INTRODUCTION



LOWER CARGO DOOR - COMPONENT LOCATION - INSIDE

Components on the Inside of the Door

The two lift mechanisms are near the upper forward and the upper aft corners of the cargo door.

The two rotary actuators are near the upper forward and upper aft corners.

The lift power unit is near the top forward part of the cargo door.

The latch/hook power unit is on the lower part of the door, near the center.

The latch mechanism goes from the latch/hook power unit to the pull-in hooks and latch cams.

Two pull-in hooks are at the forward and aft edges of the door.

Twelve latch cams are near the bottom of the door.

The lock mechanism goes from the latch/lock handle to the lock sectors on the twelve latch cams at the bottom of the door. The mechanism also goes to the two vent doors.

The latch/lock handle is forward of the door in the fuselage.

The graphic does not the show the location of the proximity sensors that do control functions. Their locations are shown at the component level.

General Description

This section describes the function of the components on the inside of the door as the door goes from the fully open position to the closed, latched, and lockedposition.

The motor in the lift power unit supplies the torque to move the door. The torque goes through the drive shafts to the rotary actuators. The torque goes from therotary actuators to the lift mechanism. The lift mechanism raises or lowers the door.

Electric power shifts from the lift power unit to the latch/hook power unit when a proximity sensor senses the door completely lowered. Torque goes from thelatch/hook power unit to the pull-in hooks. Movement of the pull-in hooks around the pull-in pins on the door cutout pulls the door into the latch position.

After the door is pulled in, torque goes from the latch/hook power unit to all the latch cams. The cams turn around the latch pins. This latches the door. Whena proximity sensor senses the door latches, it removes electric power from the power unit.

Movement of the latch/lock handle on the fuselage to the lock position, locks the door. The lock action causes these actions to occur:

- Lock mechanism locks the main latch cams at the bottom of the door- Lock mechanism holds the vent doors closed.



AFT HINGE ARM

ACTUATORROTARY

LIFT

ROTARY

LATCH/HOOK

PULL-IN HOOKS (2)

LATCHCAMS (12)

VENT DOORSFWD

ROTARYACTUATORS

ACTUATORS

POWER

MIDSPAN LATCHES (2)INBD

UNIT

POWER UNIT

(2)

DRIVESHAFT(2)

LOWER CARGO DOOR - COMPONENT LOCATION - INSIDE



LOWER CARGO DOOR - LOCK HANDLE MECHANISM

Purpose

The lock handle controls the movement of the lock mechanism.


The lock handle mechanism has these components:

- Handle release button- Handle- Spring (internal)- Connection to lock mechanism.


A push on the release button releases the lock handle. The connections to the lock mechanism transmits the movement to the lock sectors and the vent doors.



HANDLE RELEASEBUTTON

68"

LOCK HANDLE

VENT DOORS

FWD CARGO DOOR

134"

LOWER CARGO DOOR - LOCK HANDLE MECHANISM



LOWER CARGO DOOR - CONTROL SWITCHES

Purpose

Control switches let you operate the door electrically.


The open and close toggle type door control switchesare spring-loaded.


The switch lets you operate the door electrically,after the door is unlocked.



P43

LD-2

CLOSEDOOR

OPENDOOR

LIGHTSCOMPARTMENT

CARGO

CLOSE

OPEN

CONTROLDOOR

CARGOLC

FWD

LOWER CARGO DOOR - CONTROL SWITCHES



LOWER CARGO DOOR - LATCH/HOOK

Latch/hook Power Unit

The latch/hook power unit supplies torque to these components:

- Latch cams- Mid span latch cams- Pull-in hooks.


The latch/hook power unit has these components:

- Latch/hook torque tube- Electromechanical actuator- Electrical power connection- Three phase 115v ac motor.


The motor supplies torque to the electromechanical actuator. The actuator supplies torque to the latch/hook torque tube. The torque tube rotates the latch cams and then the pull-in hooks.

Latch Mechanism

The latch mechanism transmits torque from the latch/hook power unit to the latch cams and pull-in hooks.


The mechanism has these components:

- Torque tubes- Push rods- Bellcranks- Pull-in hooks- Mid span latch cams- Latch cams.


The torque tubes transmit torque to the latch cams. Thepush rods and bellcranks transmit torque from thetorque tube to the pull-in hooks and the mid span latchcams.



TORQUE TUBELATCH/HOOK

TORQUE TUBES (2)

POWER UNIT

LATCH/HOOK

LATCH/HOOK

MOTOR

FWD

INBD

MID SPAN LATCH (1 OF 2)

PUSH RODS

PULL-IN HOOKBELLCRANKS

LATCH CAMS (2 OF 12)

LOWER CARGO DOOR - LATCH/HOOK



LOWER CARGO DOOR - LIFT POWER UNIT

Purpose

The lift power unit supplies the power to open andclose the door.


The lift power unit has these components:- Three-phase 115v ac motor- Gear box- Two drive shafts.


The electric motor supplies torque through the gearboxand two drive shafts to two rotary actuators.



MOTOR

DRIVE SHAFTS (2)

GEARBOXFWD

ROTORY ACTUATORS (2)(REF)

INBD

LOWER CARGO DOOR - LIFT POWER UNIT



LOWER CARGO DOOR - FUNCTIONAL DESCRIPTION

General

Sensors on the door give inputs to the proximitysensors electronics unit (PSEU). The PSEU uses theinputs to turn on the door position indication lights,on the p43 panel, and enable door control relays.The relays supply three-phase power to the power unitson the door. The phase configuration controls whetherthe power unit opens or closes the door.

Unlock and Unlatch

A full open door lock handle enables door operation.The PSEU uses inputs from the handle unlocked sensor,the door latch range, and door unlatched sensor toenable the door latch relay. The relay configures thepower phases to unlatch the door.

Lift Movement

The PSEU uses input from the door unlatched sensor anddoor open sensor to enable the hinge up relay. Therelay configures the power phases so the lift powerunit moves the door up. The PSEU uses input from thedoor up relay to turn on the door open light, on the p43panel, and enable the cargo handling system.

Lower Movement

The PSEU uses input from these components:

- Door unlatch sensor- Door latch range- Door handle open sensors.

These components enable the hinge down relay. The relayconfigures the power phases so the lift power unitlowers the door.

The PSEU uses input from the door open sensor to turnoff the door open light, on the p43 panel.

The PSEU uses input from the latch range sensor to openthe hinge down relay.

Latch and Lock

The PSEU uses input from these components:

- Latch range sensor- Door handle open sensor- Door latched sensor.

These components enable the door latch relay. The relayconfigures the power phases so the latch power unitpulls in and latches the door. The PSEU uses inputsfrom the door handle open sensor and the door latchedsensor to open the door latch relay.

The PSEU uses inputs from the door handle open sensorand the door unlatched sensor to turn on the doorclosed light, on the p43 panel.



115V AC

28V DCGND HDLGBUS

P34 PANEL

S151 DR

PROX SW ELEC UNIT (PSEU)

FWD CARGODOOR

CARGO DRCONTROL

S150 DR

S154 DR

BUSGND HDLG

OPEN

S152 DRLATCH RANGE

LATCHED

UNLATCH

DR CLOSEDDR CONT ARM

DR HINGE UP

HINGE PDU

DR UNLATCH (P35)

LATCH ACTR

A

DR LATCH

B

B

DR HINGE DNA

DOOR OPENP43 EXT FWD CARGO DR CONT

DR OPEN OPEN

CLOSEOFF

CARGO HDLGPWR ENABLE W

W

S153 DRHANDLE UNLK

(P35)

LOWER CARGO DOOR - FUNCTIONAL DESCRIPTION



LOWER CARGO DOOR - MANUAL OPERATION

General

Use a 3/8-inch drive tool for manual door operations.

WARNING: DO NOT OPERATE THE DOOR IN WINDS MORE THAN 40 KNOTS. DO NOT LET THE DOOR STAY OPEN IN WINDS MORE THAN 65 KNOTS. INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR. WARNING: DO NOT OPEN THE DOOR WHEN THE AIRPLANE IS PRESSURIZED. INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.

Controls

There are three manual drive sockets on the door. One for the latch lock at the bottom middle of the door. Two lift sockets at the upper forward part of the door.

CAUTION: CAUTION: LIMIT MANUAL DRIVE INPUT TORQUE TO LATCH/HOOK ACTUATOR TO 130 POUND-INCHES. LIMIT POWER TOOL SPEED TO 500 RPM OR LESS. WHEN MANUALLY OPERATING POWER UNIT, STOP CONTACT IS FELT BY A SUDDEN TORQUE RISE WHICH IS NOT TO EXCEED 130 POUND-INCHES. ACTUATOR CLUTCH SLIPPAGE TIME SHOULD NOT EXCEED 5 SECONDS, DAMAGE TO SLIP CLUTCH MAY OCCUR.

Indications

Witness ports along the bottom edge of the door let you see if the door is latched and locked. Unlock and Unlatch Operations Release the latch lock handle. If the vent doors open, the door is unlocked. Insert the drive tool into the latch/lock manual drive socket. Turn it in the clockwise direction, 115 turns.The door unlatches when it moves outboard to where it can move freely a small distance inboard and outboard.

Note: The lower edge of the door should move 3 inches outboard.

Lift and Lower Operation

CAUTION: DO NOT LET THE POWER DRIVE UNIT OPERATE WITH TORQUE LIMITER SLIPPAGE FOR MORE THAN 5 SECONDS. DAMAGE TO THE POWER DRIVE UNIT CAN OCCUR. DO NOT OPERATE MANUAL DRIVE AT A SPEED FASTER THAN 500 PM OR A TORQUE MORE THAN 190 POUND-INCHES.

Insert the drive tool into the lift manual drive socket on the door outer skin. Rotate counterclockwise until the lower part of the door rotates away from the lower sill 6 feet. When the door is opened sufficiently, move the drive tool to the lift manual drive socket on the forward edge of the door. Again, rotate the drive tool counterclockwise until the door is in the full up position, 1280 full turns.

A pause at the low point of door travel is normal.

Reverse the operations to lower the door.

Latch and Lock Operation

Insert the drive tool in the latch manual drive socket. Turn it in the latch direction. The door latches.


The door must be unlatched before you lift the door with the lift manual drive socket. The door must be full down before you can latch the door with the latch manual drive socket.



LATCH LOCK

DRIVE

LIFT

MANUAL DRIVESOCKET

LATCH/HOOKCONTROL HANDLE

MANUAL

FWD

MANUALDRIVESOCKET

OUTERSKIN

FORWARDDOORSILL

DRIVEARM

FLOORBEAM

LINKARM

LIFT

SOCKET

FORWARD LARGE CARGO DOOR

LOWER CARGO DOOR - MANUAL OPERATION



BULK CARGO DOOR SYSTEM - INTRODUCTION

Purpose

The bulk cargo door system gives access to the bulk cargo compartment.

Location

The bulk cargo door is on the left side of the airplane, aft of the aft cargo door.

General Description

The bulk cargo door has a clear opening 38 inches wide and 45 inches high. Door dimensions let cargo handlers load and unload cargo that is not on pallets or in containers.

The door is a plug type. To open, it hinges along the top and moves into the bulk cargo compartment area. You can operate it manually from the outside or insidethe bulk cargo compartment.



INTERIORDOOR HANDLE

DOORCABLE

DOOR OPEN

STRAP LOOPUPLOCK

HANDLE

DOOR CLOSED

BULKCARGO

BULK CARGO DOOR SYSTEM - INTRODUCTION



BULK CARGO DOOR SYSTEM - COMPONENT LOCATION

Component Locations

The operating mechanism is on the cargo compartment ceiling structure, inboard of the bulk cargo door. The snubber is at the top, center of the cargo door. The two hinge arms are at the top of the cargo door. The latch mechanism is across the door, near the bottom.

General Description

The latch mechanism lets you open and close the door. It also holds the door closed. The hinge arms let the door rotate open and closed. The counterbalance helps to lift the door open. The snubber controls the rate of movement of the door.



LATCH TORQUE TUBE

INTERIORDOOR HANDLE

SPRINGTUBE

SPRING CABLEPULLEY

DOORCABLE

SNUBBER

HINGE ARM

DOOR STOPS(12)

LOWER STOPS (2)

LATCH CAM

DIFFERENTIAL

DOOR CENTERINGROLLER (2)

BULK CARGO DOOR SYSTEM - COMPONENT LOCATION



BULK CARGO DOOR SYSTEM - OPERATING MECHANISM

Purpose

The operating mechanism lifts the bulk cargo door to the open position.

The operating mechanism has these components:

- Spring tube- Spring cable- Differential pulley- Door cable.

Location

The operating mechanism attaches to airplane structure at the top of the bulk cargo compartment.


The springs in the tube supply the force that assists in opening the door. The differential pulley keeps the force near constant as the door travels upward.



SPRINGTUBE

SPRING CABLE

PULLEY

DOORCABLE

SNUBBER

DOOR OPENSTRAP LOOPUPLOCK

HANDLES

LEFTSIDE

FWD

DIFFERENTIAL

HANDLEEXTERIOR

HANDLEINTERIOR

BULK CARGO DOOR SYSTEM - OPERATING MECHANISM



BULK CARGO DOOR SYSTEM - OPERATION

Operation - Door Open

You can use either the internal or external handle to unlatch the door. To use the external handle, pull the handle outboard until you can turn it. To use theinternal handle, it is only necessary to turn it.

When the door is unlatched, the operating mechanism supplies the force to open the door. The snubber controls the rate at which the door opens. The doorrotates inward and upward on the hinge arms.

When the door is fully open, put the hold-open strap around the lower, aft door stop.

Operation - Door Close

To close the door, release the hold-open strap. Pull or push the door down. Turn the handle to the unlatch position to ensure the latch cams are in the properposition. Close the door. Turn the handle to the latch position. The door is latched and locked.

If you use the external handle, make sure the handle goes inboard to the fair position when you close the door.



INTERIORHANDLE

STRAP LOOPUPLOCK

HANDLE

BULKCARGO

LEFTSIDE

FWD

DOOR OPEN

EXTERIORHANDLE

LATCHCAM

BULK CARGO DOOR SYSTEM - OPERATION



DOOR WARNING SYSTEM - INTRODUCTION

Purpose

The door warning system supplies door status information.

Location

Sensors supply status information on these doors:

- Crew entry- Forward access- MEC access- Main deck cargo- Forward cargo- Aft cargo- Bulk cargo.

The sensors are electronic devices that work with targets.





CREW ENTRYDOOR

RIGID BARRIERDOOR

MAIN DECKCARGO DOOR

FORWARDCARGO DOOR

BULKCARGO DOOR

AFTCARGO DOOR

DOOR WARNING SYSTEM - INTRODUCTION



DOOR WARNING SYSTEM - INDICATIONS

General

The EICAS display (on P2) and the annunciator panel (on P5) show door indications.

EICAS Display

Advisory and caution information shows on the EICAS display.

Advisory or caution messages show for each door that is not in the closed and locked position. The large cargo doors have a caution message. The other doors have advisory messages. A single message shows when only one door of that type and location is not closed or locked. If two or more doors of that type are not closed or locked, the EICAS message changes to the type of door.

The door annunciator panel has these three groups:

- Entry doors- Cargo doors- Access doors.

Any door not closed or not locked causes the annunciator light to come on.



EICAS MESSAGES (P2)

CMPTRSEICAS

PSEUSENSORSDOOR

ENTRY DOORS C

ACCESS DOORS C

CARGO DOORS C

MAIN CARGO DOOR (B)

E/E ACCESS DOORFWD ACCESS DOOR

BULK CARGO DOOR

ANNUNCIATOR PANEL (P5)

ENTRYDOORS DOORS

ACCESSDOORSCARGO

FWD CARGO DOOR (B)AFT CARGO DOOR (B)

CREW ENTRY

DOOR WARNING SYSTEM - INDICATIONS

B767 ATA 52 Student Book

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Transcript of B767 ATA 52 Student Book