W DOC AIRBUS | AMM A320F

Removal of the Check Valve

TASK 32-51-22-000-001-A
Removal of the Check Valve

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.
WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:
  • THE FLIGHT CONTROLS
  • THE FLIGHT CONTROL SURFACES
  • THE LANDING GEAR AND THE RELATED DOORS
  • COMPONENTS THAT MOVE.
MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.
WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.
FIN: 2902GM ** ON A/C NOT FOR ALL
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 2M (6 FT)
No specific
1
CONTAINER 5 L (1.32 USGAL)
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
2
WARNING NOTICE(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
131CC
131BC
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 29-00-00-910-002-A
Safety Procedures of the 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 52-30-00-860-001-A
Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
F Check Valve 2902GM on Frame 34 ** ON A/C NOT FOR ALL
F Check Valve 2902GM on Frame 30 ** ON A/C NOT FOR ALL
3. Job Set-up
Subtask 32-51-22-010-050-A ** ON A/C NOT FOR ALL
A. Get Access
   (1) Open the FWC cargo door (Ref. AMM TASK 52-30-00-860-001).
   (2) Put the ACCESS PLATFORM 2M (6 FT) in position.
   (3) Open the panel 131CC.
Subtask 32-51-22-010-050-B ** ON A/C NOT FOR ALL
A. Get Access
   (1) Open the FWC cargo door (Ref. AMM TASK 52-30-00-860-001).
   (2) Put the ACCESS PLATFORM 2M (6 FT) in position.
   (3) Open the panel 131BC.
Subtask 32-51-22-860-050-A ** ON A/C NOT FOR ALL
B. Aircraft Maintenance Configuration
WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.
   (1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
   (2) Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-10-00-864-002):
  • do not connect the PTU isolation coupling
  • do not close the right MLG door.
   (3) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the Yellow hydraulic system:
  • on the panel 40VU in the cockpit
  • on the ground service panel of the Yellow hydraulic system.
   (4) Depressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-001).
   (5) Put the CONTAINER 5 L (1.32 USGAL) below the safety valve to collect the hydraulic fluid leakage.
Subtask 32-51-22-865-050-A ** ON A/C NOT FOR ALL
C. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUABCU &/Y BRK/PRESS IND61GGC10
** ON A/C NOT FOR ALL
49VUHYDRAULIC/Y HYD/PUMP ENG2 ALT3710GDH02
** ON A/C NOT FOR ALL
49VUHYDRAULIC/Y HYD/PUMP ENG2 ALT3710GDE12
** ON A/C NOT FOR ALL
121VUHYDRAULIC/HYD POWER/Y3803GXN30
** ON A/C NOT FOR ALL
121VUHYDRAULIC/BRAKING AND STEERING/SYS2/SPLY4GGM36
121VUHYDRAULIC/BRAKING AND STEERING/SYS2/CTL3GGM35
121VUHYDRAULIC/BRAKING AND STEERING/SYS1/CTL1GGM34
121VUHYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY2GGM33
121VUHYDRAULIC/PARK BRK/CTL/STBY71GGN37
121VUHYDRAULIC/PARK BRK/CTL/NORM70GGN36
121VUHYDRAULIC/Y HYD/PUMP ENG2/MONG3700GDQ37
121VUHYDRAULIC/Y HYD/PUMP ENG2/CTL3701GDQ36
** ON A/C NOT FOR ALL
121VUHYDRAULIC/HYD POWER/Y3803GXN31
** ON A/C NOT FOR ALL
123VUY HYD/ELEC/PUMP3802GXAB06
123VUY HYD/ELEC/ELEC PUMP/NORM3801GXAB03
4. Procedure
Subtask 32-51-22-020-050-A ** ON A/C NOT FOR ALL
A. Removal of the Check Valve 2902GM
F Check Valve 2902GM on Frame 34 ** ON A/C NOT FOR ALL
F Check Valve 2902GM on Frame 30 ** ON A/C NOT FOR ALL
WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.
CAUTION: USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN YOU DISCONNECT/CONNECT HYDRAULIC LINES ON UNIONS. IF YOU DO NOT USE THE SECOND WRENCH, THERE IS A RISK THAT YOU WILL LOOSEN OR TIGHTEN THE UNION TOO MUCH.
CAUTION: BE CAREFUL WHEN YOU REMOVE THE CHECK VALVE AS THE HYDRAULIC FLUID WILL FLOW OUT.
   (1) Loosen the two screws (1) for easy removal of the check valve 2902GM.
   (2) Disconnect the coupling nuts (2) and (4).
   (3) Remove the check valve (3).
   (4) Put blanking plugs on the disconnected line ends.
   (5) Remove the container and discard the hydraulic fluid correctly.
[Rev.10 from 2021] 2026.04.01 00:51:35 UTC
"Aviabrain" 2025