W DOC AIRBUS | AMM A320F

Removal of the Green Engine-Pump Delivery Check-Valve

TASK 29-11-36-000-803-A
Removal of the Green Engine-Pump Delivery Check-Valve

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.
WARNING: DO NOT TOUCH THE HYDRAULIC SYSTEM COMPONENTS FOR A SHORT TIME AFTER THE ENGINE IS SHUTDOWN. THE ENGINE COMPONENTS STAY HOT FOR SOME TIME AND CAN CAUSE INJURY.
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.
ZONE: 413
FIN: 1050GM
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific
AR
CAP - PROTECTION
No specific
1
CONTAINER 20L (5 USGAL)
No specific
AR
PLUG - BLANKING
No specific
AR
WARNING NOTICE(S)
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.14SBA1)
Textile-Lint free Cotton -
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
413
UPPER FWD PYLON
195BB, 197CB, 413AL
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
 D. Referenced Information
REFERENCE
DESIGNATION
TASK 29-10-00-864-001-A
Depressurize the Green Hydraulic System
TASK 29-14-00-614-001-A
Depressurization of the Hydraulic Reservoirs
TASK 54-52-11-000-807-A
Removal of the Access Skin Panels
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
F Green Engine-Pump Delivery Check-Valve
3. Job Set-up
Subtask 29-11-36-860-058-A
A. Aircraft Maintenance Configuration
   (1) Make sure that the Green hydraulic system is depressurized
(Ref. AMM TASK 29-10-00-864-001).
   (2) Depressurize the reservoir of the Green hydraulic system
(Ref. AMM TASK 29-14-00-614-001).
Subtask 29-11-36-941-056-A
B. Safety Precautions
   (1) On AIR COND panel 30VU:
  • Make sure that the APU BLEED pushbutton switch is released (ON legend off).
  • Put a WARNING NOTICE(S) in position to tell persons not to operate the APU BLEED pushbutton switch.
   (2) Open access door 197CB.
     (a) On the ground service panel, put WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system.
   (3) On the HYD section of panel 40VU:
     (a) Put WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system.
   (4) Open access door 195BB.
     (a) Put WARNING NOTICE(S) in position to tell persons not to pressurize the reservoir of the Green hydraulic system.
   (5) On the center pedestal, on ENG panel 115VU:
  • Make sure that the ENG/MODE selector switch is in the NORM position.
  • 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.
  • 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.
   (6) On the ENG section of maintenance panel 50VU:
  • Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
  • Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
Subtask 29-11-36-010-056-A
C. 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
   (2) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at the pylon.
Subtask 29-11-36-020-054-A
D. Disconnection of the Engine Hydraulic Hose
   (1) Put a CONTAINER 20L (5 USGAL) in position below the check valve (1).
   (2) Disconnect the hose (2) from the check valve (1).
   (3) Drain the hydraulic fluid from the hose (2) into the container.
   (4) Connect the hose (2) to the check valve (1). Tighten the coupling nut of the hose (2) with your hand.
Subtask 29-11-36-410-057-A
E. Close Access
   (1) Remove the access platform(s).
   (2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
Subtask 29-11-36-010-057-B
F. Get Access
   (1) Remove skin access panel 413AL (Ref. AMM TASK 54-52-11-000-807).
   (2) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
   (3) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at the pylon.
4. Procedure
Subtask 29-11-36-020-053-C
A. Removal of the Green Engine-Pump Delivery Check-Valve
CAUTION: BE CAREFUL WHEN YOU REMOVE THE CHECK VALVE AS THE HYDRAULIC FLUID WILL FLOW OUT.
   (1) Remove the sealant from the heads of the bolts (4) and (7) and around the check valve (1).
   (2) Put Textile-Lint free Cotton - (Material No.14SBA1) at the connection of the tube (3) and the check valve (1) to collect the remaining hydraulic fluid.
   (3) Remove the bolts (4) and (7) and the washers (5) that attach the check valve (1) to the pylon.
   (4) Remove the anti-rotation device (6).
   (5) Remove the sealant from the mating surfaces of the anti-rotation device (6) and the pylon.
   (6) Disconnect the tube (3) from the check valve (1).
   (7) Hold the check valve (1) and disconnect the hose (2) manually.
   (8) Remove the check valve (1) from the pylon.
   (9) Put the PLUG-BLANKING in each disconnected line end.
   (10) Put the CAP - PROTECTION on the two ends of the check valve (1).
[Rev.10 from 2021] 2026.04.01 00:15:11 UTC
"Aviabrain" 2025