DOC AIRBUS | AMM A320FDeactivation of the Thrust Reverser Actuation System (TRAS) Track Lock [PW11]
TASK 78-37-00-040-801-A
Deactivation of the Thrust Reverser Actuation System (TRAS) Track Lock
MMEL 78-30-04B
THRUST REVERSER DOOR TERTIARY LOCK
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 78-37-00-941-050-A ** ON A/C NOT FOR ALL
Subtask 78-37-00-440-057-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:34:09 UTC
Deactivation of the Thrust Reverser Actuation System (TRAS) Track Lock
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.
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.
ZONE: 400
1. Reason for the JobMMEL 78-30-04B
THRUST REVERSER DOOR TERTIARY LOCK
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | EXTENSION LENGTH 102 MM (4 IN)-SQUARE DRIVE |
| No specific | 1 | WRENCH 1/4 IN - RATCHET |
| No specific | Torque wrench: range to between 50 and 45 lbf.in (0.57 and 0.51 m.daN )  |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-00-00-860-833-A | Procedure to Prevent Engine Motoring |
| 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 78-32-37-000-801-A | Removal of the TRAS Track Lock Pin Access Panel |
TRAS Track LockSubtask 78-37-00-941-050-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 78-37-00-040-050-A ** ON A/C NOT FOR ALL (1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
B. 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 78-37-00-040-051-A ** ON A/C NOT FOR ALL A. Deactivation of the TRAS Track Lock for the Applicable Thrust Reverser Half
(1) Remove the two bolts (1) and the track lock cover (2) to get access to the lockout hole (Ref. AMM TASK 78-32-37-000-801).
PRE SB GRAA320NEO-A-78-30-0005-00001-930A-D
(2) Remove the lockout pin (3) from the latch beam.
END OF PRE SB GRAA320NEO-A-78-30-0005-00001-930A-D
POST SB GRAA320NEO-A-78-30-0005-00001-930A-D
(3) Remove the lockout pin (4) from the latch beam.
END OF POST SB GRAA320NEO-A-78-30-0005-00001-930A-D
(4) Turn the TRAS track lock lockout-lever approximately 72 degrees to the unlocked position.
(a) Use the applicable WRENCH 1/4 IN - RATCHET and the EXTENSION LENGTH 102 MM (4 IN)-SQUARE DRIVE.
PRE SB GRAA320NEO-A-78-30-0005-00001-930A-D
(5) Install the lockout pin (3) in the TRAS track lock.
END OF PRE SB GRAA320NEO-A-78-30-0005-00001-930A-D
POST SB GRAA320NEO-A-78-30-0005-00001-930A-D
(6) Install the lockout pin (4) in the TRAS track lock.
END OF POST SB GRAA320NEO-A-78-30-0005-00001-930A-D
(7) Remove the WRENCH 1/4 IN - RATCHET and the EXTENSION LENGTH 102 MM (4 IN)-SQUARE DRIVE from the TRAS track lock lockout-lever.
(a) Let the TRAS track lock lockout-lever move against the lockout pin (3) or (4) to keep the TRAS track lock lockout-lever in the unlocked position.
(8) Install the track lock cover (2) back on the latch beam with the two bolts (1).
(a) Make sure that the track lock cover (2) pin is on the top side.
(9) TORQUE the bolts (1) to between 50 and 45 lbf.in (0.57 and 0.51 m.daN ).
(10) Deactivate the TRAS track lock for the opposite thrust reverser half.
5. Close-up(1) Remove the two bolts (1) and the track lock cover (2) to get access to the lockout hole (Ref. AMM TASK 78-32-37-000-801).
PRE SB GRAA320NEO-A-78-30-0005-00001-930A-D
(2) Remove the lockout pin (3) from the latch beam.
END OF PRE SB GRAA320NEO-A-78-30-0005-00001-930A-D
POST SB GRAA320NEO-A-78-30-0005-00001-930A-D
(3) Remove the lockout pin (4) from the latch beam.
END OF POST SB GRAA320NEO-A-78-30-0005-00001-930A-D
(4) Turn the TRAS track lock lockout-lever approximately 72 degrees to the unlocked position.
(a) Use the applicable WRENCH 1/4 IN - RATCHET and the EXTENSION LENGTH 102 MM (4 IN)-SQUARE DRIVE.
NOTE: For the TRAS track lock on the left thrust reverser, you can turn the lockout lever counterclockwise. For the TRAS track lock on the right thrust reverser, you can turn the lockout lever clockwise.
(b) Keep the lockout lever in the unlocked position.PRE SB GRAA320NEO-A-78-30-0005-00001-930A-D
(5) Install the lockout pin (3) in the TRAS track lock.
END OF PRE SB GRAA320NEO-A-78-30-0005-00001-930A-D
POST SB GRAA320NEO-A-78-30-0005-00001-930A-D
(6) Install the lockout pin (4) in the TRAS track lock.
END OF POST SB GRAA320NEO-A-78-30-0005-00001-930A-D
(7) Remove the WRENCH 1/4 IN - RATCHET and the EXTENSION LENGTH 102 MM (4 IN)-SQUARE DRIVE from the TRAS track lock lockout-lever.
(a) Let the TRAS track lock lockout-lever move against the lockout pin (3) or (4) to keep the TRAS track lock lockout-lever in the unlocked position.
(8) Install the track lock cover (2) back on the latch beam with the two bolts (1).
(a) Make sure that the track lock cover (2) pin is on the top side.
(9) TORQUE the bolts (1) to between 50 and 45 lbf.in (0.57 and 0.51 m.daN )
. (10) Deactivate the TRAS track lock for the opposite thrust reverser half.
Subtask 78-37-00-440-057-A ** ON A/C NOT FOR ALL
A. Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-805).
Subtask 78-37-00-942-052-A ** ON A/C NOT FOR ALL B. 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).
(3) Make an entry in the logbook.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the WARNING NOTICE(S).
(3) Make an entry in the logbook.