W DOC AIRBUS | AMM A320F

Removal of the Fuel Recirculation Check-valve

TASK 28-16-42-000-001-A
Removal of the Fuel Recirculation Check-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.
FIN: 122QM
FIN: 123QM
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 4M (13 FT)-ADJUSTABLE
No specific
AR
CONTAINER 1 L (1/4 USGAL)
No specific
AR
PLUG - BLANKING
No specific
AR
SAFETY BARRIER(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
FOR [122QM] (CHECK VALVE-FUEL RECIRCULATION, L)
471BL
471CL
FOR [123QM] (CHECK VALVE-FUEL RECIRCULATION, R)
482BR
481CR
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 28-00-00-910-001-A
Fuel Safety Procedures
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 54-53-11-000-002-A
Removal of the Pylon-to-Wing Access Panels
TASK 54-53-11-000-002-B
Removal of the Pylon-to-Wing Access Panels
TASK 54-53-11-000-804-A
Removal of the Pylon-to-Wing Access Panels and Doors
F Check-valve ** ON A/C NOT FOR ALL
F Check-valve ** ON A/C NOT FOR ALL
F Check-valve ** ON A/C NOT FOR ALL
3. Job Set-up
Subtask 28-16-42-941-054-A
A. Safety Precautions
WARNING: OBEY THE FUEL SAFETY PROCEDURES.
   (1) You must obey the fuel safety procedures when you do work on the fuel system (Ref. AMM TASK 28-00-00-910-001).
   (2) Put the SAFETY BARRIER(S) in position.
Subtask 28-16-42-860-051-A
B. 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 28-16-42-010-050-A ** ON A/C NOT FOR ALL
C. Get Access
   (1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE below the applicable zone 470(480).
   (2) Remove the applicable access panels (Ref. AMM TASK 54-53-11-000-002):
     (a) FOR [122QM] (CHECK VALVE-FUEL RECIRCULATION, L)
     (b) FOR [123QM] (CHECK VALVE-FUEL RECIRCULATION, R)
Subtask 28-16-42-010-050-B ** ON A/C NOT FOR ALL
C. Get Access
   (1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE below the applicable zone 470(480).
   (2) Remove the applicable access panels (Ref. AMM TASK 54-53-11-000-002):
     (a) FOR [122QM] (CHECK VALVE-FUEL RECIRCULATION, L)
     (b) FOR [123QM] (CHECK VALVE-FUEL RECIRCULATION, R)
Subtask 28-16-42-010-050-C ** ON A/C NOT FOR ALL
C. Get Access
   (1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE below the applicable zone 470(480).
   (2) Remove the applicable access panels (Ref. AMM TASK 54-53-11-000-804):
     (a) FOR [122QM] (CHECK VALVE-FUEL RECIRCULATION, L)
     (b) FOR [123QM] (CHECK VALVE-FUEL RECIRCULATION, R)
4. Procedure
Subtask 28-16-42-020-050-A ** ON A/C NOT FOR ALL
A. Removal of the Fuel Recirculation Check-Valve
WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
   (1) Put a CONTAINER 1 L (1/4 USGAL) below the check valve (2).
   (2) Remove the nut (5), the bolt (3) and disconnect the bonding strip (4).
   (3) Remove and discard the lockwire from the bolts (10). Remove the bolts (10), the washers (9) and the plates (11).
   (4) Remove and discard the seal (8).
   (5) Disengage the tab washers (6) and remove the bolts (7) and the tab washers (6). Remove the check valve (2) from the mounting block. Discard the tab washers (6).
   (6) Remove and discard the O-ring (1).
   (7) Put the PLUG-BLANKING in each disconnected line end.
Subtask 28-16-42-020-050-B ** ON A/C NOT FOR ALL
A. Removal of the Fuel Recirculation Check-Valve
WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
   (1) Put a CONTAINER 1 L (1/4 USGAL) below the check valve (2).
   (2) Remove the nut (6), the bolt (3) and disconnect the bonding strips, (4) and (5).
   (3) Remove and discard the lockwire from the bolts (11). Remove the bolts (11), the washers (10) and the plates (12).
   (4) Remove and discard the seal (9).
   (5) Disengage the tab washers (7) and remove the bolts (8) and the tab washers (7). Remove the check valve (2) from the mounting block. Discard the tab washers (7).
   (6) Remove and discard the O-ring (1).
   (7) Put the PLUG-BLANKING in each disconnected line end.
[Rev.10 from 2021] 2026.04.01 07:27:15 UTC
"Aviabrain" 2025