DOC AIRBUS | AMM A320FLocking of the Right Lower Actuator (Synchronized Manual Locking Actuator) [CFML]
TASK 78-31-43-040-802-A
Locking of the Right Lower Actuator (Synchronized Manual Locking Actuator)
A. This procedure gives the instructions to lock the right lower actuator.
This actuator is also known as the synchronized manual locking actuator.
B. When the synchronized manual locking actuator is locked, the translating cowl cannot move manually or hydraulically. You can lock the synchronized manual locking actuator as a safety precaution before you do maintenance.
C. You can lock the synchronized manual locking actuator with the translating cowl in any position (fully stowed, fully deployed or in any position between stowed and deployed).
D. The locking procedure is only done during maintenance. When the maintenance is complete, you must do the unlocking procedure. Never permit flight with a synchronized manual locking actuator in the locked condition.
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 78-31-43-941-052-A
Subtask 78-31-43-040-052-A
[Rev.10 from 2021]
2026.04.01 13:13:30 UTC
Locking of the Right Lower Actuator (Synchronized Manual Locking Actuator)
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 procedure gives the instructions to lock the right lower actuator.
This actuator is also known as the synchronized manual locking actuator.
B. When the synchronized manual locking actuator is locked, the translating cowl cannot move manually or hydraulically. You can lock the synchronized manual locking actuator as a safety precaution before you do maintenance.
C. You can lock the synchronized manual locking actuator with the translating cowl in any position (fully stowed, fully deployed or in any position between stowed and deployed).
D. The locking procedure is only done during maintenance. When the maintenance is complete, you must do the unlocking procedure. Never permit flight with a synchronized manual locking actuator in the locked condition.
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 | WARNING NOTICE(S) |
| No specific | 1 | WRENCH - STANDARD |
| 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 |
Locking-Unlocking of the Right Lower Actuator (Synchronized Manual Locking Actuator)Subtask 78-31-43-941-052-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 78-31-43-010-054-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
- 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 1M(3 FT) in position.
4. Procedure(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 1M(3 FT) in position.
Subtask 78-31-43-040-052-A
A. Locking of the Right Lower Actuator (Synchronized Manual Locking Actuator)
(2) Do the steps that follow if the handle:
(b) Turn the MDU (3) approximately 180 degrees in the deploy direction or in the stow direction.
(c) Pull the yellow lock handle (2) out. The right lower actuator is not locked until the handle is at approximately 45 degrees from the axis of the right lower actuator.
CAUTION:
LOCK THE SYNCHRONIZED MANUAL LOCKING ACTUATOR BY HAND. IF YOU USE A TOOL, YOU CAN CAUSE DAMAGE TO THE SYNCHRONIZED MANUAL LOCKING ACTUATOR.
(1) Pull the yellow lock handle (2) up and away from the body of the right lower actuator (1). Continue until the handle stops at approximately 45 degrees from the axis of the right lower actuator. (2) Do the steps that follow if the handle:
- Does not move from its initial position, or
- Stops at approximately 15 degrees from the axis of the right lower actuator (1).
(b) Turn the MDU (3) approximately 180 degrees in the deploy direction or in the stow direction.
(c) Pull the yellow lock handle (2) out. The right lower actuator is not locked until the handle is at approximately 45 degrees from the axis of the right lower actuator.