DOC AIRBUS | AMM A320FRemoval of the Thrust Reverser Hydraulic Manual Control Valve [IAE]
TASK 78-31-44-000-010-A
Removal of the Thrust Reverser Hydraulic Manual Control Valve
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 78-31-44-941-052-A ** ON A/C NOT FOR ALL
Subtask 78-31-44-020-051-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:27:34 UTC
Removal of the Thrust Reverser Hydraulic Manual Control Valve
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.
WARNING:
DO NOT GET HYDRAULIC FLUID ON YOUR SKIN, IN YOUR EYES OR IN YOUR MOUTH. HYDRAULIC FLUID IS POISONOUS AND CAN GO THROUGH YOUR SKIN AND INTO YOUR BODY. FLUSH HYDRAULIC FLUID FROM YOUR EYES, MOUTH OR SKIN WITH WATER. GET MEDICAL AID IF YOU GET HYDRAULIC FLUID IN YOUR EYES OR MOUTH.
CAUTION:
DO NOT LET HYDRAULIC FLUID FALL ON THE ENGINE. UNWANTED HYDRAULIC FLUID MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT FREE CLOTH. THE FLUID CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 3M (10 FT) |
| No specific | AR | CAP - BLANKING |
| No specific | 1 | CONTAINER 20 L - SHALLOW |
| No specific | AR | PLUG - BLANKING |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 413AL | |
| FOR [1000EM2] (ENGINE-2) | |
| 423AL | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 29-10-00-864-001-A | Depressurize the Green Hydraulic System |
| TASK 29-10-00-864-002-A | Depressurize the Yellow Hydraulic System |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
| TASK 78-30-00-040-012-A | Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance |
Manual Control ValveSubtask 78-31-44-941-052-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
Subtask 78-31-44-614-051-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
B. Depressurize the Hydraulic System.
(1) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the applicable system.
(a) On the HYD/FUEL panel 40VU.
(b) On the ground service panel of the applicable hydraulic system.
(2) Depressurize the applicable hydraulic system (Ref. AMM TASK 29-10-00-864-001) or (Ref. AMM TASK 29-10-00-864-002).
(3) Depressurize the reservoir of the applicable hydraulic system (Ref. AMM TASK 29-14-00-614-001).
Subtask 78-31-44-040-051-A ** ON A/C NOT FOR ALL (1) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the applicable system.
(a) On the HYD/FUEL panel 40VU.
(b) On the ground service panel of the applicable hydraulic system.
(2) Depressurize the applicable hydraulic system (Ref. AMM TASK 29-10-00-864-001) or (Ref. AMM TASK 29-10-00-864-002).
(3) Depressurize the reservoir of the applicable hydraulic system (Ref. AMM TASK 29-14-00-614-001).
C. Deactivate the thrust reverser.
Subtask 78-31-44-941-053-A ** ON A/C NOT FOR ALL WARNING:
MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
(1) Deactivate the thrust reverser hydraulic control unit (Ref. AMM TASK 78-30-00-040-012). D. Put the ACCESS PLATFORM 3M (10 FT) in to position.
4. ProcedureSubtask 78-31-44-020-051-A ** ON A/C NOT FOR ALL
A. Removal of the Thrust Reverser Hydraulic Manual Control Valve.
(1) Remove the pylon access panel
(a) FOR [1000EM1] (ENGINE-1)
413AL
(b) FOR [1000EM2] (ENGINE-2)
423AL
(2) Put a CONTAINER 20 L - SHALLOW in to position below the manual control valve.
(3) Disconnect the pipe (5) and loosen the pipe (1) from the manual control valve (7).
(4) Remove the bolts (2) and the washers (3).
(5) Hold the valve (7), disconnect the pipe (1), remove the valve (7) and immediately put a PLUG - BLANKING on the pipe (1).
(7) Install CAP - BLANKING on all the openings.
(1) Remove the pylon access panel
(a) FOR [1000EM1] (ENGINE-1)
413AL
(b) FOR [1000EM2] (ENGINE-2)
423AL
(2) Put a CONTAINER 20 L - SHALLOW in to position below the manual control valve.
(3) Disconnect the pipe (5) and loosen the pipe (1) from the manual control valve (7).
(4) Remove the bolts (2) and the washers (3).
(5) Hold the valve (7), disconnect the pipe (1), remove the valve (7) and immediately put a PLUG - BLANKING on the pipe (1).
NOTE: A large quantity of hydraulic fluid flows from the pipe (1). Install the plug on the pipe before the end of hydraulic flow. If you do not put a plug the reservoir will become empty.
(6) Discard the hydraulic fluid from the container and let the container in position. (7) Install CAP - BLANKING on all the openings.