DOC AIRBUS | AMM A320FRemoval of the Pylon Hydraulic Tubes and Hoses [PW11]
TASK 78-31-51-000-803-A
Removal of the Pylon Hydraulic Tubes and Hoses
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 78-31-51-941-073-A ** ON A/C NOT FOR ALL
Subtask 78-31-51-020-063-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.02 07:43:31 UTC
Removal of the Pylon Hydraulic Tubes and Hoses
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AND THE ADJACENT COMPONENTS AFTER ENGINE SHUTDOWN. THE ENGINE, THE ENGINE OIL AND THE ADJACENT COMPONENTS CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.
WARNING:
WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.
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 | CAP - PROTECTION |
| No specific | 1 | CONTAINER 5 L (1.32 USGAL) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1) | |
| 437AL, 438AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2) | |
| 447AL, 448AR | |
| 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 78-30-00-040-805-A | Deactivation of the Thrust Reverser System for Ground Maintenance |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1) | |
| TASK 29-10-00-864-001-A | Depressurize the Green Hydraulic System |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2) | |
| TASK 29-10-00-864-002-A | Depressurize the Yellow Hydraulic System |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
Pylon Hydraulic Tubes and HosesSubtask 78-31-51-941-073-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833)
Subtask 78-31-51-864-058-A ** ON A/C NOT FOR ALL (1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833)
B. Depressurization of the Hydraulic Systems
(1) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
(a) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001).
(b) Depressurize the Green hydraulic reservoir (Ref. AMM TASK 29-14-00-614-001).
(2) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
(a) Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-10-00-864-002).
(b) Depressurize the Yellow hydraulic reservoir (Ref. AMM TASK 29-14-00-614-001).
Subtask 78-31-51-010-092-A ** ON A/C NOT FOR ALL (1) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
(a) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001).
(b) Depressurize the Green hydraulic reservoir (Ref. AMM TASK 29-14-00-614-001).
(2) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
(a) Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-10-00-864-002).
(b) Depressurize the Yellow hydraulic reservoir (Ref. AMM TASK 29-14-00-614-001).
C. Get Access
(1) Open the fan cowl doors (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
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
Subtask 78-31-51-040-075-A ** ON A/C NOT FOR ALL (1) Open the fan cowl doors (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
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
D. Deactivation of the Thrust Reverser for Maintenance
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 maintenance (Ref. AMM TASK 78-30-00-040-805). Subtask 78-31-51-020-063-A ** ON A/C NOT FOR ALL
A. Removal of the Pylon Hoses
(1) Remove the screws (4) and washers (5) from the clamps (6) and (7) that attach the return hose (3) and the stow hose (2) to the pylon bracket.
(2) Put a CONTAINER 5 L (1.32 USGAL) below the hoses to catch the hydraulic fluid.
(3) Disconnection of the hoses
(b) Drain the hydraulic fluid from the hoses into the CONTAINER 5 L (1.32 USGAL).
(c) Disconnect and remove the stow hose (2), the return hose (3) and the deploy hose (1) from the Tee-piece.
(4) Installation of the protection covers
(1) Remove the screws (4) and washers (5) from the clamps (6) and (7) that attach the return hose (3) and the stow hose (2) to the pylon bracket.
(2) Put a CONTAINER 5 L (1.32 USGAL) below the hoses to catch the hydraulic fluid.
(3) Disconnection of the hoses
CAUTION:
HYDRAULIC FLUID CAN CAUSE DAMAGE TO EQUIPMENT. IF HYDRAULIC FLUID FALLS ON A SURFACE, IMMEDIATELY CLEAN THE SURFACE WITH A CLEAN CLOTH.
(a) Disconnect and remove the stow hose (2), the return hose (3) and the deploy hose (1) from the pylon. (b) Drain the hydraulic fluid from the hoses into the CONTAINER 5 L (1.32 USGAL).
(c) Disconnect and remove the stow hose (2), the return hose (3) and the deploy hose (1) from the Tee-piece.
(4) Installation of the protection covers
CAUTION:
INSTALL PROTECTION COVERS ON ALL THE OPENINGS IMMEDIATELY TO PREVENT DAMAGE TO THE ENGINE.
(a) Put a CAP - PROTECTION on the hoses and the pylon hose connections.