DOC AIRBUS | AMM A320FReactivation of the Thrust Reverser System after Ground Maintenance [CFML]
TASK 78-30-00-440-809-A
Reactivation of the Thrust Reverser System after Ground Maintenance
A. This task gives the instructions to unlock the right lower actuator. This actuator is also known as the synchronized manual locking actuator.
B. When the synchronized manual locking actuator is locked, it prevents operation of the translating cowl by a mechanical locking mechanism. Lock the synchronized manual locking actuator as a safety precaution before you do core engine maintenance to prevent accidental operation of the translating cowl.
C. This locking procedure is only done during engine maintenance with the transcowl fully stowed. When maintenance is complete, you must do the unlocking procedure. There is a different task to deactivate the thrust reverser on both engines for flight (Ref. AMM TASK 78-30-00-040-808).
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 78-30-00-941-093-A
Subtask 78-30-00-440-072-A
Subtask 78-30-00-410-081-A
[Rev.10 from 2021]
2026.04.01 03:34:48 UTC
Reactivation of the Thrust Reverser System after Ground Maintenance
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.
1. Reason for the JobA. This task gives the instructions to unlock the right lower actuator. This actuator is also known as the synchronized manual locking actuator.
B. When the synchronized manual locking actuator is locked, it prevents operation of the translating cowl by a mechanical locking mechanism. Lock the synchronized manual locking actuator as a safety precaution before you do core engine maintenance to prevent accidental operation of the translating cowl.
C. This locking procedure is only done during engine maintenance with the transcowl fully stowed. When maintenance is complete, you must do the unlocking procedure. There is a different task to deactivate the thrust reverser on both engines for flight (Ref. AMM TASK 78-30-00-040-808).
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 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 71-13-00-410-803-A | Closing of the Fan Cowl Doors |
| TASK 78-30-00-440-807-A | Reactivation of the Thrust Reverser System after Nacelle Maintenance (ICU) |
Thrust Reverser for Ground MaintenanceSubtask 78-30-00-941-093-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) Make sure that the WARNING NOTICE(S) are 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) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
Subtask 78-30-00-010-099-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) Make sure that the WARNING NOTICE(S) are in position to tell persons not to operate:
- The ENG/MODE selector switch
- 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) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
B. Get Access
(1) Make sure that the fan cowl doors are open (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
4. Procedure(1) Make sure that the fan cowl doors are open (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
Subtask 78-30-00-440-072-A
A. Activate the Thrust Reverser after Ground Maintenance
(2) If the thrust reverser was deactivated hydraulically, do the activation procedure at the Isolation Control Unit (ICU) (Ref. AMM TASK 78-30-00-440-807).
5. Close-upWARNING:
DO NOT PUT YOUR FINGERS BETWEEN THE YELLOW LOCK HANDLE AND THE BODY OF THE SYNCHRONIZED MANUAL LOCKING ACTUATOR. THE LOCK HANDLE CAN MOVE BACK SUDDENLY AND CAUSE AN INJURY.
(1) Carefully push the yellow lock handle (2) into position against the body of the synchronized manual locking actuator (1). Keep your fingers on the outboard side of the lock handle (2). (2) If the thrust reverser was deactivated hydraulically, do the activation procedure at the Isolation Control Unit (ICU) (Ref. AMM TASK 78-30-00-440-807).
Subtask 78-30-00-410-081-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(3) Remove the WARNING NOTICE(S).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(3) Remove the WARNING NOTICE(S).