FIT FOR FLIGHT II Lecture notes and practice MODULE 5 ...

[email protected]©

I

Letalska angleščina II

FIT FOR FLIGHT II Lecture notes and practice

MODULE 5: SYSTEM MAINTENANCE

NIKA ZALAZNIK

Fit for Flight II

________________________________________________________________________________________________

II [email protected]©

CONTENTS

5 AIRCRAFT SYSTEM MAINTENANCE .................................................. 3

5.1 ELECTRICAL POWER ............................................................................................. 3 5.2 FUEL .......................................................................................................................... 9

5.3 HYDRAULIC POWER............................................................................................ 11 5.4 LANDING GEAR .................................................................................................... 13 5.5 WINGS ..................................................................................................................... 16 5.6 POWERPLANT ....................................................................................................... 18 5.7 SAFETY FIRST ....................................................................................................... 22

Fit for Flight II

___________________________________________________________________________________________________

3 [email protected]©

5 AIRCRAFT SYSTEM MAINTENANCE

Background information

Aircraft Maintenance is a systematic, explicit and comprehensive process for the management

of safety risks, that integrates operations and technical systems with financial management

and human resources, for all activities relate to an air operator or an approved maintenance.

The material contained in this module is for explanatory and language purposes only. Where

existing systems or components have been referenced, the example is used for the purpose of

clarity and to demonstrate the use of English. It is not my intention to advocate that particular

systems be used. In keeping with performance based regulations, this module is intended to

provide simplified technical English language details of the various regulatory maintenance

requirements and to offer examples of possible ways these elements can be used.

5.1 ELECTRICAL POWER

Vocabulary check

Before you read this chapter, check that you know these important terms. Mark a tick

() if you do. If you do not, use the glossary, a dictionary or ask your teacher.

A turbofan engine is simply a turbine engine where the first stage compressor rotor is larger in

diameter

AC loom

battery loss bundle network bus bar out of phase C/B pin charge plug clip relay contactor shed (v.) CSD shunt DC supply energise terminal fuse tie (v.) ground trip (v.) ground power voltage IDG wire kit wired load wiring diagram

Fit for Flight II

________________________________________________________________________________________________


5.1.1 Electrical power sources

A320: AMM 24.00.001

1 General

Two integrated drive generators (IDG) normally supply the a/c electrical power in

flight; each engine drives one generator. The APU drives a third, auxiliary generator

(APU GEN) which can replace either main generator (GEN 1 or GEN 2).

The generators supply the distribution network with alternating current. Two

transformer rectifiers (TR) supply, in normal configuration, the distribution network

with direct current. In the event of major failure, a constant-speed hydraulic motor

drives an emergency generator (CSM/G) to supply the systems required for a/c

control. On the ground, an electrical ground power unit (GPCU) can supply the a/c.

Independent power supply is also possible from the APU GEN.

1 AMM – Aircraft Maintenance Manual (particular sections)

Fit for Flight II

___________________________________________________________________________________________________


A300: AMM 24.41.00

1 AC Generation

A) 115/200 Volt Three-Phase Network

The main source of electrical power is the two 400 Hz constant frequency 90

KVA AC generators, each of which is driven mechanically by an engine

through a constant speed drive unit (SCD).

Each generator supplies distribution bus bars via line contactors.

Each generator is capable of supporting all the electrical loads through

transfer contactors.

A third generator, identical to the others, is driven directly at constant speed by

an auxiliary power unit (APU).

This generator ensures the electrical autonomy of the aircraft on the ground,

and can be used in flight to compensate for the loss of one or both of the

normal generators.

B) 400 Hz Single-Phase 115 Volt AC Network

A single-phase static inverter, supplied by the “emergency” DC bus bar,

supplies the emergency AC bus bar in case of failure of the main AC network.

Find an expression with the same meaning as »in the event of”.

Put the following words in the correct tenses. One word can be used more than once.

either … or, each, both, none, any, some,

several, much, many, few, little, all

1 A _________________________ cans of oil.

2 How ___________________ cabin attendants are there on _____________ A300

normally?

3 There are ___________________ possible reasons for the failure.

4 The plane can fly on __________________ two engines ___________________

one engine.

5 How __________________ fuel do you need?

6 __________________ generator supplies distribution bus bars.

7 There is only a ________________ water in the tanks.

8 The generator can be used to compensate for the loss of one or ____________ of

the normal generators.

9 Do you have __________________ questions?

10 No modification is necessary. Spares required: _________________________.

11 Aircraft affected: _______________________________.

12 Crew have reported _______________________ problems with this system.

13 Can I get you _______________ water?

Fit for Flight II

________________________________________________________________________________________________


Fill in the blanks in these sentences using expressions for conditions or possibilities:

if/should, unless, provided that

1. ___________________________ there is a failure the back-up system will come on

line.

2. ___________________________ the normal valve fails, the alternate valve will take

over.

3. The a/c can depart _______________________ there are no No-go items.

4. If the APU is inoperative, the engines cannot be started ____________________ there

is an air start unit.

Revise the use of the Passive / Active voice

Look at the structure of the sentences in italics in the A300 text and complete the table.

ACTIVE PASSIVE

SUBJECT VERB OBJECT, AGENT, etc. MEANS

active passive

(The) main source of electrical power each of which (=generators)

is is driven

(the) two generators by an engine

through a CSD.

Transform these sentences into the active mode.

Example:

PASSIVE

The transformer rectifier is supplied by the 400 Hz, 115/200 volt, 3-phase network.

ACTIVE

The 400 Hz, 115/200 volt, 3-phase network supplies the transformer rectifier.

1 The fan is put into operation automatically by an electronic module.

2 The auxiliary TR supply contactor is de-energised by the relay.

Fit for Flight II

___________________________________________________________________________________________________


3 The switch is closed by an overhaul signal.

4 The fan is supplied by the AC network.

5 The 3-phase supply is isolated by the relay.

5.1.2 Insulation damage

A300: SB 24.0692

B Reason Several instances have been reported of damage to the insulation of some electrical cable looms at the wing-to-pylon interface. Such damage could be induced by chafing of cable looms against the retaining “P” clips created by variations in this zone. This modification replaces these “P” clips with a clamp block assembly mounted on a new support angle, thereby providing a firmer method of attachment and a decrease in the amount of bending of the looms at this position.

C Description Embodiment of this modification on the a/c consist in: (1) Removing access panels at the top of the L.H. and R.H. pylons. (2) Removing and discarding some of the “P” clips attaching cable looms to a bracket

fixed to the bottom surface of the wing leading edge skin. (3) Bolting of a new support angle to the bracket on the wing skin. (4) Installation of a new clamp block and the retained “P” clips to secure the cable

looms to the new support angle. (5) Replacement of access panels.

Find the words in the SB with the same meaning as these words:

bundles area

cases wires

caused rubbing

installed thus

location ensuring

Are these sentences TRUE or FALSE?

»P« clips replace clamp assemblies. The modification reduces bending.

The modification has five steps. You discard all »P« clips.

You rivet the new support angle. The bracket is on the lower forward wing skin.

2 SB - Service Bulletin (particular sections)

Fit for Flight II

________________________________________________________________________________________________


5.1.3 Wiring error

SUBJECT: A320 ATA 24 – IDG MPU WIRING AND MMEL

EMENDMENT

1 EVENT THE PURPOSE OF THIS TELEX IS TO INFORM ALL A320 OPERATORS THAT A NUMBER OF A320 IDG MAGNETIC PICK-UP (MPU) SPEED SENSORS WERE MANUFACTURED WITH THE NOISE CANCELLATION COIL WIRED IN REVERSE. IN THIS CONFIGURATION THE FUNCTION OF THE COIL IS NO LONGER REALISED AND IN FACT NOISE MAY BE ADDED ON THE MPU SIGNAL.

2 OPERATIONAL EFFECTS A NON-COMPLYING MPU NOISE CANCELLATION COIL IS ONLY KNOWN TO AFFECT NORMAL SYSTEM OPERATION AT ENGINE START. DURING AN ENGINE START THE GCU MONITORS THE MPU SIGNAL. WHEN THIS SIGNAL IS ABOVE 4320 RPM THE GLC CLOSE AFTER A 80 MS TIME DELAY. IF NOISE IS SUPERIMPOSED ONTO THE MPU SIGNAL THE GCU COMPUTES AN OVERESTIMATED IDG SPEED. IF THE CALCULATED SPEED IS GREATER THAN 4320 RPM THE GENERATOR LINE CONTACTOR (GLC) WILL CLOSE. Use the telex to find the words with the same meaning as these words:

Objective ______________________________________

give information, tell, advise ______________________________________

some ______________________________________

non-standard, incorrect ______________________________________

influence, have an impact on ______________________________________

over, greater than ______________________________________

calculates ______________________________________

airlines ______________________________________

Answer these questions:

1 At what IDG speed does the GLC close?

2 When does this fault change system operation?

3 What do the sensors measure?

4 Which part of the sensor is wired in reverse?

5 How may this affect the value of IDG speed?

Make sentences using the information below:

1 Calculated speed > 4320 rmp GLC close

2 Delta temperature > 90oC OVERHEAT light come on

3 Pressure > 35 bars pressure relief valve open

4 Cabin altitude > 14,000 ft oxygen masks drop

Fit for Flight II

___________________________________________________________________________________________________


5.2 FUEL


() if you do. If you do not, use the glossary, a dictionary or ask your teacher/colleague.

BOOSTER LEVEL

CANISTER OUTER CELL PIPING CENTRIFUGAL PRESSURE COUPLING PUMP CROSSFEED QUANTITY DELIVER REFUEL (v.) DRAIN SHUT-OFF FILTER SURGE VENT FLOW TANK INLET TRANSFER VALVE JETTISON TRIP FUEL

5.2.1 Cable re-routing

A300: SB 28.058

RE-REUTING OF CABLE FOR HIGH LEVEL SENSOR IN OUTER TANK

A Reason There have been occurrences where the high level sensor cable between the ribs 26 and 27 in the outer fuel tank has been found chafed. The clipping and routing of the cable coupled with excessive slack between “P” clips could allow it to chafe against the support canister for the magnetic level indicator (MLI).

To prevent cable chafing, this modification introduces locally manufactured longer cleats and a reversal of the “P” clips supporting cable. To prevent further cable sag, “P” clips of a smaller size are used to grip the cable tighter. This ensures that adequate clearance is maintained between the cable and the MLI support canister.

B Action MODIFICATION OF AIRCRAFT

Drain the fuel tanks, remove the manhole covers, remove the “P” clips and cleats, manufacture new cleats, install new cleats, install new “P” clips, install the manhole covers and test for leakage.

Fit for Flight II

________________________________________________________________________________________________


Use these words from the text to complete the sentences.

routing, sag/slack, chafing, grip, clearance

1 The clamps _____________________________ the wiring in position.

2 Loose clipping results in _____________________________________.

3 Cable _________________________ is shown on the diagram.

4 If the clipping is loosing there may be _______________________ on the adjacent

structure.

5 There must be 20mm _______________________ between the wiring and the

structure.

Add the adjective or qualifier which is used in the text with each of these words:

tank outer manufactured ________________

level ___________________ cleats ________________

slack ___________________ cable sag ________________

indicator ___________________ size ________________

chafing ___________________ clearance ________________

5.2.2 Engine flame-out

A300: AOT 28.033

SUBJECT: SINGLE ENGINE FLAME OUT IN FLIGHT DUE TO FUEL STARVATION DESCRIPTION

A) TO IDENTIFY THE CONTROL KNOB CONFIGURATION. PLEASE NOTE THAT FOLLOWING

WING TANK/CROSS FEED VALVE KNOBS EXIST: 1) P/N NM87-1006-3 (ISOLATION VALVE), NM87-1011-4 (X-FEED VALVE): BASIC

VERSION WITH A ROUND BORE, FITTABLE TO THE FLAT DRIVE SHAFT BY SPECIAL INSTALLATION INSTRUCTIONS ONLY (SHOULD NOT BE IN SERVICE ANY MORE).

B) SONCE NO P/N IS ENGRAVED ON THE CONTROL KNOBS, A PHYSICAL CHECK OF THE BORE IS TO BE PERFORMED BY REMOVING THE CONTROL KNOBS. AIRBUS INDUSTRIE STRONGLY RECOMMEND APPLYING THE TEST PROCEDURE AS PER AMM 28.21.00, PAGE BLOCK 400, SUBSEQUENT TO CONTROL KNOB REINSTALLATION, THUS ASSURING THAT THE TANK ISOLATION VALVES AND X-FEED VALVE ARE ACTUALLY OPEN.

Check if this information is TRUE or FALSE.

There was an engine fire in flight. Fuel flow was stopped to one engine.

The fuel level was set to OFF. The bore of the old Knob is circular.

3 AOT – All Operators Telex

Fit for Flight II

___________________________________________________________________________________________________


The Knob bore is ROUND, the drive shaft is FLAT. What shape (form) are the

following parts?

square, spherical, cylindrical, flat, round, tapered, rectangular, curved

floor panel ____________________ passenger door __________

fire extinguisher ____________________ bell crank __________

display unit ____________________ wheels __________

trailing edge profile ____________________ rod __________

Find the words in the text that fit these definitions:

inscribed, marked ___________________________________________________

absence of supply, feeding ___________________________________________________

transmits movement ___________________________________________________

making sure ___________________________________________________

cylindrical hole ___________________________________________________

that can be attached to ___________________________________________________

5.3 HYDRAULIC POWER



ACCUMULATOR PIPE

BLUE PRESSURE BYPASS PTU CASE DRAIN PUMP CLOG RAT FILTER RESERVOIR FLUID RETURN GREEN SERVOS HOSE SUCTION LEAK SURGE MANIFOLD UNION NON RETURN VALVE YELLOW

5.3.1 Fire shut-off valve jamming

PRELIMINARY INFORMATION

PLS BE INFORMED THAT DGAC INTENDS TO ISSUE AN AIRWORTHINESS DIRECTIVE TO COVER SUBJECT MATTER. AS A PRELIMINARY INFORMATION PLS FIND HEREAFTER CONTENT:

AIRBUS INDUSTRIE A300, A310 AND A300-600 AIRPLANES. FIRE SHUT-OFF VALVE

Fit for Flight II

________________________________________________________________________________________________


THS AIRWORTHINESS DIRECTIVE APPLIES TO A300, A310 AND A300-600 AIRBUS INDUSTRIE AIRPLANES. ALL MODELS AND ALL SERIAL NUMBERS WITHOUT LUCAS AIR EQUIPMENT SERVICE BULLETIN NO B38LC15-29-05. IN ORDER TO PREVENT A FIRE SHUT-OFF VALVE JAMMING, THE FOLLOWING IS RENDERED MANDATORY:

1) IDENTIFY AFFECTED HYDRAULIC FIRE SHUT-OFF VALVES IN ACCORDANCE WITH LUCAS AIR EQUIPMENT SERVICE BULLETIN NO B38LC15-29-05.

2) MODIFY THEREAFTER AFFECTED HYDRAULIC FIRE SHUT-OFF VALVES IN ACCORDANCE WITH LUCAS AIR EQUIPMENT SERVICE BULLETIN NO B38LC15-29-05, BEFORE OCTOBER 1ST.

Use the text to see if these sentences are TRUE or FALSE.

1 The Airworthiness Directive has been issued.

2 The Airworthiness Directive only applies to a/c with SB B38LC15-29-05. 3 The Airworthiness Directive makes two actions compulsory.

4 The Airworthiness Directive is to stop the fire shut-off valve from inadvertently

shutting.

5 The Airworthiness Directive sets a deadline on October 1st.

What are the four verbs that start with »l«?


1 What are the two actions you must do to the hydraulic fire shut-off valve?

2 Who is the valve manufacturer?

3 What expression means »as per«, to agree with?

4 In a telex, how do you write »please«?

Find the odd one out in each of these series:

inform notify record advise tell

publish output issue print dispatch

the following thereafter below hereafter as follows

all every each both none

involved relevant effected concerned affected

5.3.2 Cable chafing

PRELIMINARY INFORMATION

FACTS SOME CASE OF THE HYDRAULIC FIRE SHUT OFF VALVE (FSOV) FAILING TO CLOSE DURING MAINTENANCE TASKS HAVE BEEN REPORTED TO AIRBUS INDUSTRIE.

Fit for Flight II

___________________________________________________________________________________________________


INVESTIGATIONS HAVE REVEALED THAT THE ACTUATOR INTERNAL CABLES GOING FROM THE CONNECTOR (ITEM 130 P 1018 OF CMM 29-10.01) TO THE MICROSWITCHES (ITEM 340 P 1018 OF CMM 29-10-01) COULD CHAFE AGAINST THE ELECTRICAL MOTOR BRUSHES, LEADING TO WIRING INSULATION DAMAGE. A BATCH OF 189 ACTUATORS, WHICH PRESENT A POTENTIAL RISK OF CABLE CHAFING, HAS BEEN IDENTIFIED. THIS TYPE OF ACTUATOR IS NO LONGER PRODUCED NAD HAS BEEN REPLACED BY ACTUATOR P/N E01100 AMENDMENT A OR P/N A06A00. THE DESIGN OF THESE ACTUATORS PREVENTS CABLE FROM CHAFING WITH MOTOR BRUSHES. NOTA: THE ACTUATOR ITSELF (P/N E01100 ITEM 1 P 1017 OF CMM 29-10-01) IS AN LRU EQUIPMENT. Translate the telex into Slovenian.

In the following sentences below, can you recognise which of the following five

conjunctions you need? They are all used in the TFU.

despite, since, however, in order to, if

1 Tests were conducted ___________________________ isolate the fault.

2 _____________________________ the part is unsatisfactory, a modification will

be embodied.

3 They performed a series of tests, __________________________ they could not

isolate the fault.

4 __________________________ the tests, they could not isolate the fault.

5 __________________________ the could not isolate the fault, they returned the

part to the manufacturer.

5.4 LANDING GEAR



ANTI-SKID AXLE

PIN BAY PROXIMITY SWITCH BUNGEE SLEEVE DEFLATE DRAG STRUT TORQUE LINKS UPLOCK GRAVITY EXTENSION INFLATE (v.) LEG LOCK NUT RETRACT

Fit for Flight II

________________________________________________________________________________________________


5.4.1 Loss of nose wheel

A 320 OPERATOR INFORMATION TELEX 0030/91

EVENT DESCRIPTION THE FOLLOWING EVENT HAS BEEN REPORTED RECENTLY TO AIRBUS INDUSTRIE.

- AFTER DEPARTURE FROM GATE AND WHILE TAXIING TO THE RUNWAY, THE PILOT REPORTED A NOSE LANDING GEAR VIBRATION FOLLOWED BY THE LOSS OF THE L/H NOSE WHEEL. THEN, THE A/C STOPPED ON THE RUNWAY.

- THE L/H WHEEL OUTER BEARING, THE AXLE SLEEVE AND THE WHEEL LOCKING BOLTS WERE FOUND BROKEN.

- THIS WHEEL HAD ACCUMULATED 86 LANDINGS SINCE LAST INSTALLATION. - PARTS ARE CURRENTLY IN THE HANDS OF LOCAL AIRWORTHINESS AUTHORITIES FOR

INVESTIGATION. Use the telex to decide if the following sentences are true or false.

The incident occurred after take-off. The crew felt vibrations.

The left main gear wheel came off. The a/c stopped on the taxiway.

The outer bearing was broken. It was a new wheel.

We remember words more easily by families, groups of words which have relation.

Make a mind map (network) about the landing gear. You can group words like this:

wheels tires steering brakes operation structure

axle inflation lock-out overheat spin-up bogie

5.4.2 Free-fall extension cable removal

A 320: AMM 32.33.16

Procedure (Ref. Fig. 403/TASK 32-33-16-991-002)

Subtask: 32-33-16-050

WARNING: MAKE SURE THAT THE NOSE GEAR AND DOOR SAFETY PINS ARE INSTALLED.

A. Remove the applicable cable(s) (1) and/or (2) as follows: (1) Remove and discard the cotter pins (8) (2) Remove these items:

a. The nuts (9) and the washers (7) b. The bolts (4) and the spacers (6) c. The cable-guard

(3) Remove the cable-guide locking-devices (11) and the fairleads (10).

Fit for Flight II

___________________________________________________________________________________________________


(4) Remove the locking clips (16) from the turnbuckles (17). (5) Loosen the turnbuckles (17) for the cables (1) and (2) until the tension in the

cables is released. (6) On the cable(s) to be removed, continue to loosen the turnbuckle(s) (17) until the

cable(s) is/are disconnected. (7) If necessary, temporarily attach the loose cable(s) (12) and/or (14) to the

structure. (8) Release the cable(s) (1) and/or (2) from the cable pulley (3) and remove it/them

from the a/c.

Describe the procedure in your own words, using sequence words.

Find the procedure the contrary of these actions:

detach _______________ keep ______________________

apply _______________ connected ______________________

tighten _______________ stop, discontinue ________________

install _______________

Find the words in the procedure which have the same meaning as the words below.

mounted _______________ ensure ____________________

relevant _______________ untighten ____________________

components _______________ airplane ____________________

if required _______________ throw away ____________________

Fill in the table below with the correct word forms from the text.

VERB ADJECTIVE NOUN

lengthen

hard

size

What do these contractions mean? Look at the example.

HYD hydraulic BRK ___________________ BRT ______________________

ALTN ___________________ AVNCS ______________________

GEN ___________________ XMTR ______________________

DIA ___________________ COMPT ______________________

PNL ___________________ ASYM ______________________

TK ___________________ CKPT ______________________

ASSY ___________________ Y ______________________

XFEED ___________________ CKT ______________________

Fit for Flight II

________________________________________________________________________________________________


5.5 WINGS



PANEL ALLOY

BAFFLE BOUNDARY LAYER FAIRING DIHEDRAL MANHOLE VORTEX MATE (v.) WEB HONEYCOMB NO-STEP STRINGER FENCE SEALING SPAN

5.5.1 Spring rod removal

A 300: CMM 53.25.11

In this text, 12 different words are replaced by the word »blimp«. Use the context,

illustration and your knowledge to replace the »blimps« A-L with the correct word. This

exercise will help you find the approximate meaning of the words you do not know.

Removal of spring (1) Drive out cotter blimp _________________ (A) (8), nuts (7), washers (6), screws

(2) and (4) bushings (3) and (5). Blimp __________________ (B) spring rod (1). (2) Refer blimp __________________ © Overhaul Manual 27.61.12 for disassembly

of spring rod. Removal of upper relay

(1) Drive out blimp ____________________ (D) pin (21), washer (19), drive out shouldered shaft (18) and retain spacers (17), fitting (16) blimp _____________ (E) bell crank assy (9).

(2) Disassembly of bell crank a. Remove shouldered bushings (10) and (11). b. Uncrimp bush (13) and extract bearing (12). c. Extract ball blimp ________________ (F) (14) and spacer (15).

Disassembly of micro switch and mechanism

(1) Before modification 1180 a. Drive out cotter pin (33), nut (32), washer (31), blimp _______________

(G) (30), bush (29). Remove spring. b. Blimp _________________ (H) cotter pin (24), blimp ______________ (I)

(23), washer (22). Drive out blimp ____________ (J) (19), blimp ___________________ (K) washer (21), bushing (20) and locking arm assy.

c. Blimp ________________ (L) and drive out shouldered pin (27), remove spacer (28) and remove locking arm (18).

Fit for Flight II

___________________________________________________________________________________________________


Find the components which have these functions:

1 It keeps a distance between two parts _______________________________

2 It changes direction of movement _______________________________

3 It secures bolts, screws, nuts, etc. _______________________________

4 It gives the nut a flat surface _______________________________

5 It attaches bolts, screws _______________________________

6 It puts screws, bolts, etc. in position _______________________________

5.5.2 Loss of shroud panels

A 320 TELEX 953.2149/91

SUBJECT: A320 – ATA 56 – LOSS OF SHROUD PANELS FWD OF AILERON TWO CASES HAVE RECENTLY BEEN REPORTED WHERE THE UPPER OUTBOARD SHROUD PANEL P/N 0587654008/009 (IPC 57-51-05 FIG. 31A ITEM 10A) FWD OF AILERON DETACHED IN FLIGHT. INVESTIGATIONS INITIAL INVESTIGATIONS INDICATE A PRODUCTION DIFFICULTY ON A RECENT BATCH OF PANELS, THE SOURCE OF WHICH HAS BEEN LOCATED AND CORRECTED. IT APPEARS THAT THE INSTALLATION IS CAUSING THE FASTENERS TO PULL THROUGH THE CFRP PANEL. FOLLOW-UP PLAN THAT AN ALL OPERATOR TELEX WILL BE ISSUED NEXT WEEK REQUESTING ONE-TIME VISUAL INSPECTION OF THESE PANELS. SUBJECT TO CONFIRMATION, THE AFFECTED BATCH OF PANELS WERE INSTALLED ON APPROXIMATELLY 80 A/C, STARTING WITH MSN 183. REPAIR, IF REQUIRED WILL BE BY MANUFACTURING THE PANEL OF ALUMINUM ALLOY.


1 Which ATA chapter is involved?

2 Was the aileron lost?

3 How many cases have occurred?

4 When did incidents occur?

5 Was the problem caused by a manufacturing defect?

6 Are the fasteners becoming lose?

7 Will the new inspection be performed periodically?

8 Is a/c No 83 affected?

9 Are the panels in composite?

10 Which word means “a series of parts manufactured together”?

Are the verbs in the telex active or passive? Find all the verbs.

Find the contrary of these expressions:

fwd of ______________ upper outboard ______________ inner rear ____________

inboard of ___________ left outer ________________ top left ______________

Fit for Flight II

________________________________________________________________________________________________


5.6 POWERPLANT



MASTER LEVER MID-SPAN

CLEARANCE PICK-UP PYLON EGT SHROUD FOD SPINNER SPOOL STALL THRUST REVERSES WET START FLAME-OUT SHUTDOWN INGESTION

5.6.1 Aborted take-off

CFMI CFM 56-3 TELEX

THE PURPOSE OF THIS WIRE IS TO PROVIDE CURRENT INFORMATION RELATIVE TO THE ABORTED TAKEOFF AT WICHITA, KANSAS ON MARCH 2008. DISASSEMBLY AND INSPECTION OF THE CFM 56-3-81 ENGINE INVOLVED IN THE ABORTED TAKEOFF HAS REVEALED A STAGE 1 HPC BLADE FAILURE DUE TO HIGH CYCLE FATIGUE (HCF). THE BLADE FAILED IN HCF ORIGINATING JUST FORWARD OF CORNER 3 ON THE DOVETAIL PRESSURE FACE. ONE HPC STAGE 1 VARIABLE STATOR VANE (VSV) LEVER ARM WAS FOUND TO BE DISENGAGED FROM THE VSV ACTUATION HALF-RING. THIS ALLOWED THE VANE TO ROTATE FREELY DURING ENGINE OPERATION WHICH RESULTED IN A ONE-PER-REV EXCITATION TO THE STAGE 1 BLADE RESULTING IN THE HCF BLADE FAILURE. ALL INDICATIONS ARE THAT THE STAGE 1 VSV LEVER ARM WAS NOT ENGAGED IN THE VSV ACTUATION RING DURING THE LAST ENGINE SHOP VISIT (376 HOURS/172 CYCLES) PRIOR TO THE FAILURE. THE BLADE FAILURE, THEREFORE, APPEARS TO HAVE BEEN THE RESULT OF THE DISENGAGED LEVER ARM. Complete the data that is missing from these sentences.

A take-off had to be ________________________ in ______________________, KA on

March _____________________, 1990. A Stage 1 ______________________ blade failed.

The failure was caused by _________________________ as a result of a large number of

_____________________________. The failure occurred in front of ___________________

3 on the pressure face. On the VSV actuation _________________________ a lever

__________________ was disengaged. As a result the __________________________ could

rotate freely. It appears that the Stage 1 VSV ______________________ arm was not

engaged in the ______________________ during the last shop visit.

Fit for Flight II

___________________________________________________________________________________________________


Find the four expressions that express cause.

Find the synonyms for the words in the text.

objective ________________ permitted __________________

telex ________________ disconnected __________________

present ________________ before __________________

seems ________________ dismantling __________________

consequently ________________ concerned __________________

5.6.2 Cracks

A320 TFU 78.11.12.01

FOUR OPERATORS HAVE REPORTED ONE CASE EACH OF CRACKED CENTERBODY ASSEMBIES. BOTH CRACKS OCCURRED AT STATION 291.6 ADJECENT TO THE WELD. THE CRACKS PROPAGATED CIRCUMFERENTIALLY ABOUT 260 DEGREES. ROHR ALL OPERATORS LETTER AOL-CFM56-003 REV B WAS ISSUED MARCH 2007. THIS REVISION CHANGES THE INSPECTION INTERVAL FROM “A” CHECK TO 150 FLIGHT HOURS. ROHR ALL OPERATORS LETTER CFM-56-003 ISSUED NOVEMBER 19TH 2006 RUNS CONCURRENTLY WITH THIS REVISION. INCLUDED IN A.O.L. CFM56-003 ARE THE FLY ON LIMITS AND REPAIRS. ROHR ARE CONTINUING TO VIBRATION TEST CENTERBODIES. INITIAL RESULTS INDICATE VIBRATION INDUCED FAILURE. WE WILL INFORM OPERATORS OF THE RESULTS OF THESE FURTHER TESTS, AND IF ANY SERVICE ACTION IS REQUIRED. Look for the words in the text with the same meaning as these:

happened ____________________ modifies _____________________

next to ____________________ simultaneously ________________

spread ____________________ caused ______________________

around ____________________ additional ______________________

published ____________________ needed ______________________

What does A.O.L mean?

Look at these examples of verbs used in compound expressions. Then write your own

compound expressions using a verb to correspond to the definitions below.

Example:

To test with vibrations = to vibration test

Caused by vibrations = vibration induced

The time a/c can continue to fly before an inspection = fly-on time

Fit for Flight II

________________________________________________________________________________________________


caused by friction

to test for fatigue related to frequency power for go-round masks which drop down engine in which fuel is injected an area to run up the engine related to corrosion fuel burnt off during flight to tighten by hand

5.6.3 Oil leak

CFMI CFM 56 TELEX: DAMPED No 5

BEARING OIL SUPPLY TUBE RECENTLY, TWO CFM 56-3C OPERATORS EXPERIENCED OIL LEAKING FROM THE AFT COWL AREA. BOTH ENGINES WERE WITHIN 600 TO 850 FLIGHT HOURS SINCE NEW. TROUBLESHOOTING REVEALED AN EXTERNAL OIL LEAK IN THE LPT FRAME, LOCATED AT THE OIL SUPPLY AND SCAVENGE TUBE EXITS FROM STRUTS 5 AND 6. ORIGIN OF THE LEAK WAS DETERMINED TO BE A CRACK IN THE NUMBER 5 BEARING OIL DAMPER CAVITY SUPPLY TUBE, CLOSE TO THE INLET COVER FITTING WELD JOINT. IN BOTH CASES, THE FAULTY TUBE WAS REPLACED ON WING AND THE A/C RELEASED FOR REVENUE SERVICE. THE AFFECTED HARDWARE IS UNDER INVESTIGATION TO ESTABLISH THE CAUSE OF THE CRACK AND DEFINE CORRECTIVE ACTIONS. IF LEAKS FROM A NO. 5 BEARING OIL DAMPED CAVITY SUPPLY TUBE ARE CONFIRMED, A PROCEDURE IS AVAILABLE TO REPLACE THE TUBE ON-WING. THIS PROCEDURE WILL BE INCORPORATED IN SERVICE BULLETIN 72-472, TARGETED TO BE ISSUED BEFORE JUNE 30. WE WILL KEEP YOU INFORMED AS FURTHER INFORMATION BECOMES AVAILABLE.

Are the following sentences TRUE or FALSE?

The leak was cause by a loose fitting. The leak comes from a bearing.

Two airlines have experienced this failure. The plumbing was repaired.

The SB will be issued as from the end of June. The engines were relatively new.

Find the words which mean the same as the following:

Near __________ permits easy movement ______________

Outlets _________ scheduled flights ______________

Ready __________ encountered ______________

Inside __________ it is an objective ______________

Fit for Flight II

___________________________________________________________________________________________________


5.6.4 In-flight power reduction

A320 OIT 0101/08

SUBJECT: A320 CFM56-5 ATA 78 UNCOMMANDED ENGINE POWER REDUCTION IN FLIGHT

FURTHER TO SOME OPERATORS’ COMMENTS ON THE ORIGINAL ISSUE. THE REVISION OF THIS O.I.T. PROVIDES CLARIFICATION ON PARA III. THE O.I.T. NOW READS AS FOLLOWS: EVENT DESCRIPTION ON 19 MAY 2006, ONE OPERATOR EXPERIENCED AN UNCOMMANDED ENGINE POWER REDUCTION IN FLIGHT DURING THE CRUISE PHASE AFTER MORE THAN 3 HOURS FLIGHT. THE FLIGHT WAS ENDED WITHOUT DIVERSION OR OTHER EVENT. THE FOLLOWING SNAGS HAVE BEEN REPORTED:

- ENG 2 REV FAULTY ECAM WARNING CAME ON DURING CRUISE FOLLOWED BY ENG 2 POWER REDUCTION (DOWN TO 38 PERCENT N1)

- ENGINE 2 STAYED AT IDLE THROUGHOUT THE REST OF THE FLIGHT - ENGINE 1 OPERATION NORMAL - CFDS FADEC SYSTEM REPORT SHOWS STOW 8WJ5 DEPL/STPW SW.

Tick the specific engine failures among these various failures. Do not count accessory

failure.

jamming flame-out discrepancy

wet start surge leak

shut down ingestion vibration

clogging rumbling hung start

Find out the words which mean the same as the following:

following ______________________

edition ______________________

uncontrolled, unwanted, spurious ______________________________________________

incidents, problems, failures ______________________________________________

told about by the crew ______________________________________________

appeared, illuminated ______________________________________________

during all _____________________

retract, move in _____________________

Fit for Flight II

________________________________________________________________________________________________


5.7 SAFETY FIRST

PAPER WORK

Aircraft maintenance engineers are responsible for keeping a log of all the repairs and work

they do on an aircraft so that safety remains their biggest concern. Before a aircraft returns to

the skies, an AME must ensure that all components work properly and safely. Therefore, they

put the aircrafts through a number of standard tests, which consequently makes frequent fliers

feel a lot safer about air travel.

Fit for Flight II

___________________________________________________________________________________________________


Fit for Flight II

________________________________________________________________________________________________


Write a maintenance procedure report using no more than 50 words.

Fill in the maintenance log.

Use all necessary information of your own and the following prompts.

Loss of fuel flow to the engine

- engine No 2 experienced loss of fuel flow and vibration

- maintenance inspection found disclosed metal in the oil filters and evidence of internal

and external overheating at the fan frame vents

- actions taken

ProSlo AirService: Maintenance hangar report

Aircraft type: Owner: Category Discrepancy Action Engine and fuel Airframe Hydraulics/controls Landing gear Electrics Avionics and instruments Technician: Supervisor: Name: Name: Date: Date:

Conclusion

People entrust their lives to aircraft maintenance engineers in the hope that they are properly

maintaining and repairing aircraft carriers. When we feel turbulence on a plane or anything

that disrupts our general feelings of aircraft safety, we hope that everything on the plane is

regularly maintained and in good working condition.

Fit for Flight II

___________________________________________________________________________________________________


References

Bristow, G.V. Technical Pilot Interview.

Kukovec, A. 2001. Flying.

Kukovec, A.1994. Angleško-slovenski letalski slovar. Ljubljana: Uprava za zračno plovbo

McMillian Career English. 1984. Aviation Maintenance. Macmillan.

Morgan, D., Regan, N. 2008. Take-off. Technical English for Engineering. Workbook. Garnet

Morgan, D., Regan, N. 2008. Take-off. Technical English for Engineering. Course Book. Garnet

Shawcross, P. 1992. English for Aircraft. System Maintenance. Paris: Belin.

Shawcross, P.1992. English for Aircraft 1, Documentation Handbook. Paris : Belin.

Zalaznik, N. 2009. Engineering Your Future. Impletum

www.nasa.gov

http://www.nasa.gov/

FIT FOR FLIGHT II Lecture notes and practice MODULE 5 ...

Documents

Transcript of FIT FOR FLIGHT II Lecture notes and practice MODULE 5 ...