W DOC AIRBUS | AMM A320F

Removal of the Safety Valve

TASK 32-51-21-000-001-A
Removal of the Safety 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. WORK ON THE HYDRAULIC SYSTEMS CAN BE DANGEROUS.
FIN: 2900GM ** 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
PLUG - BLANKING
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
2
WARNING NOTICE(S)
 B. Referenced Information
REFERENCE
DESIGNATION
TASK 20-23-21-911-001-A
Removal/Installation of the Bobbins from their Housings and Installation of O-rings, Square Seals, and Back-up Rings on the Bobbins
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 32-12-00-010-001-A
Open the Main Gear Doors for Access
F Safety Valve
3. Job Set-up
Subtask 32-51-21-010-050-A ** ON A/C NOT FOR ALL
A. Get Access
   (1) Open the right MLG door (Ref. AMM TASK 32-12-00-010-001)
   (2) Put the ACCESS PLATFORM 2M (6 FT) in position.
Subtask 32-51-21-860-050-A ** ON A/C NOT FOR ALL
B. Aircraft Maintenance Configuration
   (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 (6) to collect the hydraulic fluid leakage.
Subtask 32-51-21-865-050-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
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 32-51-21-020-050-A ** ON A/C NOT FOR ALL
A. Removal of the Safety Valve
   (1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
   (2) Hold the safety valve (6) with your hand.
   (3) Remove the bolts (4) and (5) and the washers (3).
   (4) Remove the safety valve (6) from the manifold (1).
   (5) Remove and discard the drum-equipped assemblies (2) from the safety valve (6) (Ref. AMM TASK 20-23-21-911-001).
   (6) Put the PLUG-BLANKING in each disconnected line end.
[Rev.10 from 2021] 2026.04.01 12:32:36 UTC
"Aviabrain" 2025