DOC AIRBUS | AMM A320FOperational Check of the Thrust Reverser Actuation System (TRAS) Track Lock [PW11]
TASK 78-37-01-710-802-A
Operational Check of the Thrust Reverser Actuation System (TRAS) Track Lock
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 78-37-01-941-052-A ** ON A/C NOT FOR ALL
Subtask 78-37-01-440-052-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:34:16 UTC
Operational Check of the Thrust Reverser Actuation System (TRAS) Track Lock
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.
WARNING:
WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.
ZONE: 400
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE |
| No specific | 1 | DRIVE 3/8 IN - SQUARE |
| 636-3000-28GSE | 1 | TR ACT. PRIM. LCK PIN |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1) | |
| 437AL, 438AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2) | |
| 447AL, 448AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-00-00-860-833-A | Procedure to Prevent Engine Motoring |
| TASK 71-13-00-010-802-A | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-802-A | Closing of the Fan Cowl Doors |
| TASK 78-30-00-040-805-A | Deactivation of the Thrust Reverser System for Ground Maintenance |
| TASK 78-30-00-440-805-A | Reactivation of the Thrust Reverser System after Ground Maintenance |
| TASK 78-32-00-860-802-A | Manual Extension of the Thrust-Reverser Translating Sleeves |
| TASK 78-32-00-860-803-A | Manual Retraction of the Thrust-Reverser Translating Sleeves |
| TASK 78-37-01-000-801-A | Removal of the Thrust Reverser Actuator System (TRAS) Track Lock |
| TASK 78-37-01-400-801-A | Installation of the Thrust Reverser Actuator System (TRAS) Track Lock |
TRAS Track LockSubtask 78-37-01-941-052-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
Subtask 78-37-01-010-054-A ** ON A/C NOT FOR ALL (1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position to get access to the TRAS locking feedback-actuator.
Subtask 78-37-01-040-052-A ** ON A/C NOT FOR ALL (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position to get access to the TRAS locking feedback-actuator.
C. Deactivation of the Thrust Reverser for Ground Maintenance
4. ProcedureWARNING:
YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.
(1) Do the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-805). CAUTION:
WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.
Subtask 78-37-01-710-051-A ** ON A/C NOT FOR ALL A. Check of the Left and Right Track-Lock Locking-Mechanism
(1) Make sure that the TRAS track lock is in the locked position. See the figure:
(2) Make sure that the translating sleeve is in the retracted position (Ref. AMM TASK 78-32-00-860-803).
(3) Deactivate the feedback locking actuator for the applicable thrust reverser half.
(a) Turn the feedback locking actuator manual lock drive to the unlocked position.
(b) Install the 636-3000-28GSE TR ACT. PRIM. LCK PIN in the feedback locking actuator through the manual lock drive to hold the manual lock drive in the unlocked position. Refer to the manufacturer's instructions.
(4) Deactivate the locking actuator for the applicable thrust reverser half.
(a) Turn the locking actuator manual lock drive to the unlocked position.
(b) Install the 636-3000-28GSE TR ACT. PRIM. LCK PIN in the locking actuator through the manual lock drive to hold the manual lock drive in the unlocked position. Refer to the manufacturer's instructions.
(5) Make sure the manual drive unit lever is in the unlocked position.
(6) Engage the DRIVE 3/8 IN - SQUARE in the manual drive unit.
(7) Check of the applicable translating sleeve
(b) Make sure that the applicable translating sleeve will not extend. A hard stop should be felt while you try to turn the manual drive.
Subtask 78-37-01-440-051-A ** ON A/C NOT FOR ALL (1) Make sure that the TRAS track lock is in the locked position. See the figure:
(2) Make sure that the translating sleeve is in the retracted position (Ref. AMM TASK 78-32-00-860-803).
(3) Deactivate the feedback locking actuator for the applicable thrust reverser half.
(a) Turn the feedback locking actuator manual lock drive to the unlocked position.
(b) Install the 636-3000-28GSE TR ACT. PRIM. LCK PIN in the feedback locking actuator through the manual lock drive to hold the manual lock drive in the unlocked position. Refer to the manufacturer's instructions.
(4) Deactivate the locking actuator for the applicable thrust reverser half.
(a) Turn the locking actuator manual lock drive to the unlocked position.
(b) Install the 636-3000-28GSE TR ACT. PRIM. LCK PIN in the locking actuator through the manual lock drive to hold the manual lock drive in the unlocked position. Refer to the manufacturer's instructions.
(5) Make sure the manual drive unit lever is in the unlocked position.
(6) Engage the DRIVE 3/8 IN - SQUARE in the manual drive unit.
(7) Check of the applicable translating sleeve
CAUTION:
DO NOT USE POWER TOOLS TO EXTEND OR RETRACT THE TRANSLATING SLEEVE. DAMAGE TO EQUIPMENT CAN OCCUR.
CAUTION:
DO NOT EXCEED THE MAXIMUM SPEED OF 600 RPM ON THE MANUAL DRIVE UNIT. IF YOU DO, DAMAGE TO EQUIPMENT CAN OCCUR.
(a) Slowly try to manually extend the applicable translating sleeve (Ref. AMM TASK 78-32-00-860-802). (b) Make sure that the applicable translating sleeve will not extend. A hard stop should be felt while you try to turn the manual drive.
NOTE: It is possible that the translating sleeve will move a small distance.
(c) If a hard stop is not felt and the translating sleeve continues to extend, replace the applicable track lock (Ref. AMM TASK 78-37-01-000-801) and (Ref. AMM TASK 78-37-01-400-801). B. Return of the Applicable Translating Sleeve to the Retracted and Locked condition
(1) Remove the 636-3000-28GSE TR ACT. PRIM. LCK PIN from the locking actuator. Refer to the manufacturer's instructions.
(2) Remove the 636-3000-28GSE TR ACT. PRIM. LCK PIN from the locking feedback actuator. Refer to the manufacturer's instructions.
(3) Manually retract the translating sleeve to the retracted and locked condition (Ref. AMM TASK 78-32-00-860-803).
(4) Make sure that the locking actuator and feedback locking actuator manual lock drives are in the locked position.
5. Close-up(1) Remove the 636-3000-28GSE TR ACT. PRIM. LCK PIN from the locking actuator. Refer to the manufacturer's instructions.
(2) Remove the 636-3000-28GSE TR ACT. PRIM. LCK PIN from the locking feedback actuator. Refer to the manufacturer's instructions.
(3) Manually retract the translating sleeve to the retracted and locked condition (Ref. AMM TASK 78-32-00-860-803).
(4) Make sure that the locking actuator and feedback locking actuator manual lock drives are in the locked position.
Subtask 78-37-01-440-052-A ** ON A/C NOT FOR ALL
A. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).
Subtask 78-37-01-410-051-A ** ON A/C NOT FOR ALL B. Close Access
(1) Remove the access platform(s).
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
Subtask 78-37-01-942-050-A ** ON A/C NOT FOR ALL (1) Remove the access platform(s).
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
C. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the WARNING NOTICE(S).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the WARNING NOTICE(S).