DOC AIRBUS | AMM A320FRemoval of the Thrust Reverser Cowl Opening System [CFML]
TASK 78-36-51-000-802-A
Removal of the Thrust Reverser Cowl Opening System
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 78-36-51-941-057-A
Subtask 78-36-51-020-054-A
[Rev.10 from 2021]
2026.04.01 12:57:58 UTC
Removal of the Thrust Reverser Cowl Opening System
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
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 | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1) | |
| 437AL, 438AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2) | |
| 447AL, 448AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-803-A | Opening of the Fan Cowl Doors |
| TASK 78-30-00-040-807-A | Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU) |
| TASK 78-36-00-010-806-A | Opening of the Thrust Reverser Cowl Doors |
Thrust Reverser Cowl Opening Actuator (PRE SB BD70CR78-010 and/or PRE SB BD70CR78-009)Subtask 78-36-51-941-057-A
A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
Subtask 78-36-51-010-063-A (1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate:
- The ENG/MODE selector switch, and
- The ENG/MASTER 1(2) control switch.
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
Subtask 78-36-51-040-060-A (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
C. Deactivation of the Thrust Reverser System for Nacelle Maintenance
Subtask 78-36-51-010-071-A 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 nacelle maintenance (Ref. AMM TASK 78-30-00-040-807). Subtask 78-36-51-020-054-A
A. Removal of the Thrust Reverser Cowl Opening System
PRE SB BD70CR78-010
(1) Disconnection of the actuator (1) from the engine bracket (14):
(a) Remove the screw (8).
(b) Remove the bonding strap (9).
(c) Loosen and remove the nut (10) and the washer (11).
(d) Remove the bolt (12).
(e) Disconnection of the actuator (1) from the engine bracket (14).
(f) If necessary, remove the bushing (13) from the engine bracket (14).
END OF PRE SB BD70CR78-010
POST SB BD70CR78-010
(2) Disconnection of the actuator (1) from the engine bracket (14):
(a) Remove the nut (24).
(b) Remove the screw (20).
(c) Remove the bonding strap (19).
(e) Loosen and remove the nut (22).
(f) Remove the washer (23).
(g) Remove the bolt (26).
(h) Remove the bushing (25).
(i) Disconnect the actuator (1) from the engine bracket (14).
END OF POST SB BD70CR78-010
PRE SB BD70CR78-009
(3) Disconnection of the actuator (1) from the thrust reverser bracket (7):
(a) Loosen and remove the screw (2).
(b) Remove the anti-rotation device (3).
(c) Remove the screw (4).
(d) Remove the bushing (5).
(e) Remove the pin (6).
(f) Disconnect the actuator (1) from the thrust reverser bracket (7).
END OF PRE SB BD70CR78-009
POST SB BD70CR78-009
(4) Disconnection of the actuator (1) from the thrust reverser bracket (7):
(a) Loosen and remove the screw (15).
(b) Remove the anti-rotation device (16).
(c) Remove the pin (17).
(d) Remove the bushing (18).
(e) Disconnect the actuator (1) from the thrust reverser bracket (7).
END OF POST SB BD70CR78-009
(5) Carefully remove the actuator (1).
NOTE: This procedure is given for the thrust reverser left cowl opening system. It is also applicable to the thrust reverser right cowl opening system.
PRE SB BD70CR78-010
(1) Disconnection of the actuator (1) from the engine bracket (14):
(a) Remove the screw (8).
(b) Remove the bonding strap (9).
(c) Loosen and remove the nut (10) and the washer (11).
(d) Remove the bolt (12).
(e) Disconnection of the actuator (1) from the engine bracket (14).
CAUTION:
KEEP THE BUSHING WHEN YOU DISCONNECT THE ACTUATOR.
1 Disconnect the actuator (1) from the engine bracket (14). (f) If necessary, remove the bushing (13) from the engine bracket (14).
END OF PRE SB BD70CR78-010
POST SB BD70CR78-010
(2) Disconnection of the actuator (1) from the engine bracket (14):
(a) Remove the nut (24).
(b) Remove the screw (20).
(c) Remove the bonding strap (19).
WARNING:
USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.
(d) Remove and discard the pin (21). (e) Loosen and remove the nut (22).
(f) Remove the washer (23).
(g) Remove the bolt (26).
(h) Remove the bushing (25).
(i) Disconnect the actuator (1) from the engine bracket (14).
END OF POST SB BD70CR78-010
PRE SB BD70CR78-009
(3) Disconnection of the actuator (1) from the thrust reverser bracket (7):
(a) Loosen and remove the screw (2).
(b) Remove the anti-rotation device (3).
(c) Remove the screw (4).
(d) Remove the bushing (5).
(e) Remove the pin (6).
(f) Disconnect the actuator (1) from the thrust reverser bracket (7).
END OF PRE SB BD70CR78-009
POST SB BD70CR78-009
(4) Disconnection of the actuator (1) from the thrust reverser bracket (7):
(a) Loosen and remove the screw (15).
(b) Remove the anti-rotation device (16).
(c) Remove the pin (17).
(d) Remove the bushing (18).
(e) Disconnect the actuator (1) from the thrust reverser bracket (7).
END OF POST SB BD70CR78-009
(5) Carefully remove the actuator (1).