DOC AIRBUS | AMM A320FInstallation of the Thrust Reverser Bifurcation Latch Pin [PW11]
TASK 78-32-73-400-801-A
Installation of the Thrust Reverser Bifurcation Latch Pin
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 78-32-73-941-051-A ** ON A/C NOT FOR ALL
Subtask 78-32-73-410-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:33:49 UTC
Installation of the Thrust Reverser Bifurcation Latch Pin
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.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | Torque wrench: range to between 1360 and 1190 lbf.in (15.37 and 13.45 m.daN )  |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1) | |
| 437AL, 438AR, 452AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2) | |
| 447AL, 448AR, 462AR | |
| 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 78-32-71-000-802-A | Removal of the Right Thrust Reverser Thermal Insulation Blankets |
| TASK 78-32-71-400-802-A | Installation of the Right Thrust Reverser Thermal Insulation Blankets |
| TASK 78-36-00-010-802-A | Opening of the Thrust Reverser Cowl-Doors |
| TASK 78-36-00-410-802-A | Closing of the Thrust Reverser Cowl-Doors |
Thrust Reverser Bifurcation Latch PinSubtask 78-32-73-941-051-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
Subtask 78-32-73-010-052-A ** ON A/C NOT FOR ALL (1) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
B. Get Access
(1) Make sure that the fan cowl doors are open (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
Subtask 78-32-73-040-051-A ** ON A/C NOT FOR ALL (1) Make sure that the fan cowl doors are open (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
C. Deactivation of the Thrust Reverser System for Maintenance
Subtask 78-32-73-010-053-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) Make sure that you did the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-805). D. Get Access
(1) Make sure that the right thrust-reverser cowl-door is open (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
462AR
(2) Make sure that you removed the BLS latch blanket from the lower inner structure of the right thrust-reverser door (Ref. AMM TASK 78-32-71-000-802).
4. Procedure(1) Make sure that the right thrust-reverser cowl-door is open (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
462AR
(2) Make sure that you removed the BLS latch blanket from the lower inner structure of the right thrust-reverser door (Ref. AMM TASK 78-32-71-000-802).
CAUTION:
WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.
Subtask 78-32-73-420-050-A ** ON A/C NOT FOR ALL A. Installation of the Bifurcation Latch System (BLS) Pin
(1) Removal of the protection covers
(2) Install the BLS pin assembly (5) on the right thrust reverser door.
(a) Install the BLS pin assembly (5) to the IFS with the bolt (1), washer (2), bushing (3) and nut (4).
(b) TORQUE the nut (4) to between 1360 and 1190 lbf.in (15.37 and 13.45 m.daN ).
5. Close-up(1) Removal of the protection covers
CAUTION:
REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.
(a) Make sure that you remove all the necessary COVER - PROTECTION to prevent damage to the engine. (2) Install the BLS pin assembly (5) on the right thrust reverser door.
(a) Install the BLS pin assembly (5) to the IFS with the bolt (1), washer (2), bushing (3) and nut (4).
(b) TORQUE the nut (4) to between 1360 and 1190 lbf.in (15.37 and 13.45 m.daN )
. Subtask 78-32-73-410-050-A ** ON A/C NOT FOR ALL
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the BLS latch blanket on the lower inner structure of the right thrust reverser door (Ref. AMM TASK 78-32-71-400-802).
(3) Close the right thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
462AR
Subtask 78-32-73-440-050-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the BLS latch blanket on the lower inner structure of the right thrust reverser door (Ref. AMM TASK 78-32-71-400-802).
(3) Close the right thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
462AR
B. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).
Subtask 78-32-73-410-051-A ** ON A/C NOT FOR ALL