AMM_12-14-32-614-001-A

@A318/A319/A320/A321AIRCRAFT MAINTENANCE MANUAL

LANDING GEAR - SERVICING

** On A/C ALL

Task 12-14-32-614-001-ANitrogen Filling of the Tires

WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START ATASK ON OR NEAR:- THE FLIGHT CONTROLS- THE FLIGHT CONTROL SURFACES- THE LANDING GEAR AND THE RELATED DOORS- COMPONENTS THAT MOVE.

WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR.

1. Reason for the Job

Self explanatory

2. Job Set-up Information

A. Fixtures, Tools, Test and Support Equipment

REFERENCE QTY DESIGNATION

No specific AR ADAPTER - TIRE INFLATION/DEFLATION

No specific 1 CART - INFLATION, TIRE, NITROGEN

No specific AR SAFETY BARRIER(S)

No specific Torque wrench: range to between 0.00 and 1.20 M.DAN (0.00 and 9.00LBF.FT)

3. Job Set-up

Subtask 12-14-32-941-062-A

A. Safety Precautions

(1) Put the safety barriers in position.

Subtask 12-14-32-941-051-A

B. Preparation

WARNING : LET THE BRAKES AND THE WHEELS BECOME COOL BEFORE YOU GO NEAR THELANDING GEAR. DO NOT APPLY A LIQUID OR GAS FIRE EXTINGUISHER DIRECTLY ON AHOT WHEEL OR BRAKE UNIT. THIS COULD CAUSE AN EXPLOSION.

WARNING : DO NOT PUT COMPRESSED GAS IN CONTACT WITH YOUR SKIN. THE GAS CAN GOTHROUGH THE SKIN AND MAKE BUBBLES IN THE BLOOD. THIS CONDITION CAN KILLYOU.

WARNING : BE CAREFUL WHEN YOU INFLATE THE TIRES.USE A PRESSURE REGULATOR (OR PRESSURE RELIEF VALVE) BETWEEN THE PRESSURESOURCE AND THE TIRE.MAKE SURE THAT THE PRESSURE REGULATOR IS ADJUSTED TO THE CORRECTPRESSURE FOR THE TIRE.

KNA Nov 01/1112-14-32 PB301

Revision n˚: 12


IF THE PRESSURE SOURCE DOES NOT HAVE A PRESSURE REGULATOR, THERE IS A RISKOF INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

WARNING : USE ONLY DRY NITROGEN OR OTHER INERT GASES TO INFLATE THE TIRES ON THEMAIN GEAR WHEELS.THE OXYGEN IN THE GAS USED TO INFLATE THESE TIRES MUST NOT BE MORE THAN5% (VOLUME).IF THE AIRCRAFT IS FAR FROM ITS BASE AND NO DRY NITROGEN IS AVAILABLE, YOUCAN USE AIR FOR THE SERVICING OF THE TIRES IF:- THE OXYGEN IN THE TIRES IS NOT MORE THAN 5% (VOLUME)OR- MAINTENANCE PERSONNEL REMOVE THE AIR FROM THE TIRES AND INFLATE

THEM WITH DRY NITROGEN BEFORE 15 HOURS TIME SERVICE.A CHEMICAL REACTION BETWEEN THE OXYGEN IN THE TIRES AND GASES FROM THEINNER LINER CAN CAUSE A TIRE EXPLOSION.

(1) Put the CART - INFLATION, TIRE, NITROGEN near the tire to be inflated.

(2) Remove the tire inflation-valve cap.

(3) Install the ADAPTER - TIRE INFLATION/DEFLATION on the tire inflation valve. Connect the tireinflation cart to the tire inflation adaptor.

(4) If there is a large temperature decrease between the departure and the destination airports, you mustadjust the tire pressure for the colder airport before the flight. If the temperature difference is equal toor more than 24 deg.C (18 deg.F) lower, do this procedure:

(a) Increase the given tire pressures 3.7% for each 10 deg.C (18 deg.F) of temperature difference.-------------------------------------------------------------------------------! EXAMPLE: Temperature at departure airport = 20 deg.C (68 deg.F) !! Temperature at arrival airport = -10 deg.C (+14 deg.F) !! Temperature difference = 30 deg.C (54 deg.F). !!-----------------------------------------------------------------------------!! Increase the tire pressure: 30/10 x 3.7% = 11.1%. !!-----------------------------------------------------------------------------!! If the loaded tire pressure is 13.0 bar (189 psi), !! increase the tire pressure: !! 13.0 bar (189 psi) + (13.0 bar (189 psi)x 11.1%)) !! = 14.4 bar (209 psi). !-------------------------------------------------------------------------------

4. Procedure

WARNING : USE ONLY NITROGEN FOR TIRE INFLATION. IF THE BRAKES OVERHEAT, OTHER GASES CANCAUSE AN EXPLOSION.

NOTE : In the tables that follow the term ’loaded’ means with the aircraft weight on the wheels. The term ’unloaded’is when the applicable wheel is off the ground (jacked).

KNA Nov 01/1112-14-32 PB301

Revision n˚: 12


Subtask 12-14-32-614-056-B

A. Nitrogen Filling of the NLG Tires

(1) Refer to the table to find the correct NLG tire pressure. If necessary, inflate the tire(s) with nitrogen(from an approved source) to the correct pressure.

A/C MAXIMUM RAMPWEIGHT (MRW)

TIRE DIMENSION AND TYPE INFLATION PRESSUREUNLOADED BARS (PSI)

INFLATION PRESSURELOADED BARS (PSI)

77400 kg(170638 lb)

30 X 8.8 - 15CONVENTIONAL

11.8 (171) normal12.4 (180) max

12.3 (178) normal12.9 (187) max

77400 kg(170638 lb)

30 X 8.8 R15RADIAL

11.8 (171) normal12.4 (180) max

12.3 (178) normal12.9 (187) max

Subtask 12-14-32-614-057-L

B. Nitrogen Filling of the MLG Tires

(1) Refer to the table to find the correct MLG tire pressure. If necessary, inflate the tire(s) with nitrogen(from an approved source) to the correct pressure.

A/C MAXIMUM RAMPWEIGHT (MRW)

TIRE DIMENSION ANDTYPE

INFLATION PRESSUREUNLOADED BARS (PSI)

INFLATION PRESSURELOADED BARS (PSI)

77400 kg(170638 lb)

46 X 17 R20RADIAL

13.8 (200) normal14.5 (210) max

14.4 (209) normal15.1 (219) max

77400 kg(170638 lb)

49 X 19 R20RADIAL

10.3 (149) normal10.8 (157) max

10.7 (155) normal11.2 (162) max

77400 kg(170638 lb)

46 X 16 - 20CONVENTIONAL

13.8 (200) normal14.5 (210) max

14.4 (209) normal15.1 (219) max

77400 kg(170638 lb)


11.5 (167) normal12.1 (175) max

12.0 (174) normal12.6 (182) max

77400 kg(170638 lb)


10.3 (149) normal10.8 (157) max

10.7 (155) normal11.2 (162) max

5. Close-up

Subtask 12-14-32-942-051-A

A. Removal of Equipment

(1) Remove the SAFETY BARRIER(S).

(2) Disconnect the tire inflation cart, adaptor and gage.

(3) Install the tire inflation-valve cap. TORQUE the valve cap to between 0.05 and 0.1 M.DAN (4.42 and8.85 LBF.IN).

(4) Remove the inflation cart from the area.

(5) Remove the ground support and maintenance equipment, the special and standard tools and all otheritems.

KNA Nov 01/1112-14-32 PB301

Revision n˚: 12

AMM_12-14-32-614-001-A

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