DOC AIRBUS | AMM A320FRemoval of the Thrust Reverser Actuator System (TRAS) Track Lock [PW11]
TASK 78-37-01-000-801-A
Removal of the Thrust Reverser Actuator 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 78-37-01-941-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:34:13 UTC
Removal of the Thrust Reverser Actuator 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.
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 1M(3 FT) |
| No specific | AR | CAP - PROTECTION |
| No specific | AR | CLOTH - PROTECTIVE |
| No specific | AR | COVER - PROTECTION |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-00-00-860-832-A | Procedure to Prevent Engine Motoring and to Stop the Electrical Supply to the EEC |
| TASK 71-13-00-010-802-A | Opening of the Fan Cowl Doors |
| TASK 78-30-00-040-805-A | Deactivation of the Thrust Reverser System for Ground Maintenance |
| TASK 78-32-38-000-801-A | Removal of the Track Lock Cover |
| TASK 78-36-00-010-802-A | Opening of the Thrust Reverser Cowl-Doors |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1) | |
| TASK 29-10-00-864-001-A | Depressurize the Green Hydraulic System |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2) | |
| TASK 29-10-00-864-002-A | Depressurize the Yellow Hydraulic System |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
LH TRAS Track LockSubtask 78-37-01-941-050-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) Do the procedure to prevent engine motoring and to stop the electrical supply to the Electronic Engine Control (EEC)
(Ref. AMM TASK 71-00-00-860-832).
Subtask 78-37-01-010-050-A ** ON A/C NOT FOR ALL (1) Do the procedure to prevent engine motoring and to stop the electrical supply to the Electronic Engine Control (EEC)
(Ref. AMM TASK 71-00-00-860-832).
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 1M(3 FT) in position.
Subtask 78-37-01-630-050-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 1M(3 FT) in position.
C. Depressurization of the Hydraulic System
(a) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001).
(b) Depressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(2) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
(a) Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-10-00-864-002).
(b) Depressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-001).
Subtask 78-37-01-040-050-A ** ON A/C NOT FOR ALL WARNING:
MAKE SURE YOU DEPRESSURIZED THE HYDRAULIC SYSTEM. IF YOU LOOSEN A HYDRAULIC TUBE FITTING WHEN THERE IS PRESSURE IN THE HYDRAULIC SYSTEM, YOU CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
(1) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)(a) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001).
(b) Depressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(2) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
(a) Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-10-00-864-002).
(b) Depressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-001).
D. Deactivation of the Thrust Reverser for maintenance
Subtask 78-37-01-010-051-A ** ON A/C NOT FOR ALL WARNING:
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 maintenance (Ref. AMM TASK 78-30-00-040-805). E. Get Access
(1) Open the applicable thrust reverser cowl-door (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR.
4. Procedure(1) Open the applicable thrust reverser cowl-door (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR.
CAUTION:
WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.
Subtask 78-37-01-020-050-A ** ON A/C NOT FOR ALL A. Removal of the TRAS Track Lock
(a) Remove the track lock cover (Ref. AMM TASK 78-32-38-000-801).
(b) Disconnect the TRAS monitoring harness (4038KS-A) and (4046KS-A) from the TRAS track lock (1).
(c) Install CAP - PROTECTION on the TRAS monitoring harness connectors and the TRAS track lock (1).
(d) Put CLOTH - PROTECTIVE under the TRAS track lock (1) to collect the remaining hydraulic fluid.
(e) Disconnect the control tube, aft return tube, and return tube from the TRAS track lock (1).
(f) Install CAP - PROTECTION on the control tube, aft return tube, return tube and the TRAS track lock (1).
(g) Remove the bolt (4), washers (2) and (3) and the grounding strap from the TRAS track lock (1).
PRE SB GRAA320NEO A-78-30-0005-00001-930A-D
(h) Remove the three bolts (6) and three washers (5) that attach the TRAS track lock (1) to 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
(i) Do the following:
1 Remove the bolt (6) that attaches the pin guard (7) and the TRAS track lock (1) to the latch beam.
2 Remove the two bolts (6) and two washers (5) that attach the TRAS track lock (1) to the latch beam.
END OF POST SB GRAA320NEO A-78-30-0005-00001-930A-D
(j) Carefully remove the TRAS track lock (1) from the latch beam.
(2) Remove the TRAS track lock (11) from the right thrust reverser door.
(a) Remove the track lock cover (Ref. AMM TASK 78-32-38-000-801).
(b) Disconnect the TRAS monitoring harness (4039KS-A) and (4047KS-A) from the TRAS track lock (11).
(c) Install CAP - PROTECTION on the TRAS monitoring harness connectors and the TRAS track lock (11).
(d) Put CLOTH - PROTECTIVE under the TRAS track lock (11) to collect the remaining hydraulic fluid.
(e) Disconnect the control tube, aft return tube and return tube from the TRAS track lock (11).
(f) Install CAP - PROTECTION on the control tube, aft return tube, return tube and TRAS track lock (11).
(g) Remove the bolt (16), washers (14) and (15) and grounding strap from the TRAS track lock (11).
PRE SB GRAA320NEO A-78-30-0005-00001-930A-D
(h) Remove the three bolts (13) and the three washers (12) that attach the TRAS track lock (11) to 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
(i) Do the following:
1 Remove the bolt (13) that attaches the pin guard (17) and the TRAS track lock (11) to the latch beam.
2 Remove the two bolts (13) and two washers (12) that attach the TRAS track lock (11) to the latch beam.
END OF POST SB GRAA320NEO A-78-30-0005-00001-930A-D
(j) Carefully remove the TRAS track lock (11) from the latch beam.
(3) Installation of the protection covers
WARNING:
THE TRAS TRACK LOCK VALVE (TLV) CAN CONTAIN HYDRAULIC FLUID. BE CAREFUL WHEN YOU REMOVE THE TRAS TRACK LOCK VALVE.
WARNING:
YOU MUST NOT GET HYDRAULIC FLUID ON YOUR SKIN, IN YOUR EYES OR IN YOUR MOUTH. THE HYDRAULIC FLUID IS POISONOUS AND CAN BE ABSORBED INTO YOUR BODY. IF YOU ACCIDENTALLY GET HYDRAULIC FLUID IN YOUR EYES, MOUTH OR ON YOUR SKIN, FLUSH WITH WATER AND GET MEDICAL AID.
CAUTION:
HYDRAULIC FLUID CAN CAUSE DAMAGE TO EQUIPMENT. IF HYDRAULIC FLUID FALLS ON A SURFACE, IMMEDIATELY CLEAN THE SURFACE WITH A CLEAN CLOTH.
CAUTION:
USE TEFLON-JAWED PLIERS TO LOOSEN/TIGHTEN ELECTRICAL CONNECTORS. DO NOT USE METAL-JAWED PLIERS. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE ELECTRICAL CONNECTORS CAN OCCUR.
CAUTION:
USE A SECOND WRENCH TO HOLD THE MATING PARTS WHEN YOU LOOSEN OR TIGHTEN THE TUBE OR HOSE NUTS. IF YOU DO NOT OBEY THIS INSTRUCTION, YOU CAN TWIST THE TUBES OR HOSES OR CAUSE DAMAGE TO THEM.
(1) Remove the TRAS track lock (1) from the left thrust reverser door. (a) Remove the track lock cover (Ref. AMM TASK 78-32-38-000-801).
(b) Disconnect the TRAS monitoring harness (4038KS-A) and (4046KS-A) from the TRAS track lock (1).
(c) Install CAP - PROTECTION on the TRAS monitoring harness connectors and the TRAS track lock (1).
(d) Put CLOTH - PROTECTIVE under the TRAS track lock (1) to collect the remaining hydraulic fluid.
(e) Disconnect the control tube, aft return tube, and return tube from the TRAS track lock (1).
(f) Install CAP - PROTECTION on the control tube, aft return tube, return tube and the TRAS track lock (1).
(g) Remove the bolt (4), washers (2) and (3) and the grounding strap from the TRAS track lock (1).
PRE SB GRAA320NEO A-78-30-0005-00001-930A-D
(h) Remove the three bolts (6) and three washers (5) that attach the TRAS track lock (1) to 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
(i) Do the following:
1 Remove the bolt (6) that attaches the pin guard (7) and the TRAS track lock (1) to the latch beam.
2 Remove the two bolts (6) and two washers (5) that attach the TRAS track lock (1) to the latch beam.
END OF POST SB GRAA320NEO A-78-30-0005-00001-930A-D
(j) Carefully remove the TRAS track lock (1) from the latch beam.
(2) Remove the TRAS track lock (11) from the right thrust reverser door.
(a) Remove the track lock cover (Ref. AMM TASK 78-32-38-000-801).
(b) Disconnect the TRAS monitoring harness (4039KS-A) and (4047KS-A) from the TRAS track lock (11).
(c) Install CAP - PROTECTION on the TRAS monitoring harness connectors and the TRAS track lock (11).
(d) Put CLOTH - PROTECTIVE under the TRAS track lock (11) to collect the remaining hydraulic fluid.
(e) Disconnect the control tube, aft return tube and return tube from the TRAS track lock (11).
(f) Install CAP - PROTECTION on the control tube, aft return tube, return tube and TRAS track lock (11).
(g) Remove the bolt (16), washers (14) and (15) and grounding strap from the TRAS track lock (11).
PRE SB GRAA320NEO A-78-30-0005-00001-930A-D
(h) Remove the three bolts (13) and the three washers (12) that attach the TRAS track lock (11) to 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
(i) Do the following:
1 Remove the bolt (13) that attaches the pin guard (17) and the TRAS track lock (11) to the latch beam.
2 Remove the two bolts (13) and two washers (12) that attach the TRAS track lock (11) to the latch beam.
END OF POST SB GRAA320NEO A-78-30-0005-00001-930A-D
(j) Carefully remove the TRAS track lock (11) from the latch beam.
(3) Installation of the protection covers
CAUTION:
INSTALL PROTECTION COVERS ON ALL THE OPENINGS IMMEDIATELY TO PREVENT DAMAGE TO THE ENGINE.
(a) Make sure that you install COVER - PROTECTION as necessary to prevent damage to the engine.