W DOC AIRBUS | AMM A320F

Removal of the Sequence Valve

TASK 28-21-45-000-001-A
Removal of the Sequence Valve

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: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.
1. Reason for the Job
Self 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
SAFETY BARRIER(S)
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
98D57004014000
1
HOOK-COVER (RIB2-SURGE DOORS)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
540AB, 540BZ, 640AB, 640BZ
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 28-10-00-910-001-A
Safety Procedures When You Do Work in a Fuel Tank
TASK 28-10-00-910-002-A
Access to the Fuel Tanks and the Work Areas
TASK 28-25-00-650-001-A
Pressure Defuel
TASK 28-25-00-650-003-A
To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 28-25-00-650-003-A-01
To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 57-27-11-000-001-A
Removal of the Access Panel
F Sequence Valves - Wing-Fuel-Tank Inner-Cell
3. Job Set-up
Subtask 28-21-45-941-050-A ** ON A/C NOT FOR ALL
A. Safety Precautions
WARNING: BEFORE YOU DO WORK IN OR NEAR A FUEL TANK, MAKE SURE THAT YOU OBEY ALL THE SAFETY PROCEDURES. THIS WILL PREVENT INJURY TO PERSONS AND/OR DAMAGE TO THE AIRCRAFT.
   (1) You must obey the fuel safety procedures (Ref. AMM TASK 28-10-00-910-001) when you do work in a fuel tank.
   (2) Put the SAFETY BARRIER(S) in position.
Subtask 28-21-45-865-050-A ** ON A/C NOT FOR ALL
B. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VUFUEL/L WING TK/PUMP2 SPLY7QAN26
121VUFUEL/L WING TK/PUMP1 SPLY1QAN23
121VUFUEL/R WING TK/PUMP2 SPLY8QAQ26
121VUFUEL/R WING TK/PUMP1 SPLY2QAQ23
123VUL WING TK/PUMP 1/STBY SPLY11QAAD12
123VUR WING TK/PUMP 1/STBY SPLY12QAAE12
Subtask 28-21-45-650-052-A ** ON A/C NOT FOR ALL
C. Fuel Configuration
   (1) Defuel the applicable fuel tank (Ref. AMM TASK 28-25-00-650-001).
   (2) Drain the remaining fuel from the applicable fuel tank (Ref. AMM TASK 28-25-00-650-003).
Subtask 28-21-45-010-050-A ** ON A/C NOT FOR ALL
D. Get Access
   (1) Put the ACCESS PLATFORM 3M (10 FT) in position below the applicable access panel 540AB(640AB).
   (2) Remove the applicable access panel 540AB 640AB (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-001).
   (3) Open the applicable access door 540BZ 640BZ and install the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS).
4. Procedure
Subtask 28-21-45-020-051-A ** ON A/C NOT FOR ALL
A. Removal of the Sequence Valve
   (1) Remove the bolts (8) and then the sequence valve assembly from the pump canister. Remove and discard the O-ring (1).
   (2) Remove the bolts (3), move the mounting plate (9) and the elbow (5) apart and discard the O-ring (2).
   (3) Remove the bolts (4), move the elbow (5) and the sequence valve (7) apart and discard the O-ring (6).
NOTE: It is possible to adapt this procedure to remove only part of the assembly.
[Rev.10 from 2021] 2026.04.02 07:02:48 UTC
"WTRUIB" 2025