W DOC AIRBUS | AMM A320F

Removal of the Main-Transfer-System Clack Valve

TASK 28-26-44-000-001-A
Removal of the Main-Transfer-System Clack 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.
ZONE: 540
ZONE: 640
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 2M (6 FT) - ADJUSTABLE
No specific
AR
ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific
AR
CAP - BLANKING
No specific
AR
SAFETY BARRIER(S)
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
AR
WARNING NOTICE(S)
460005835
1
SLEEVE - GROUND LOCK
98D57004014000
1
HOOK-COVER (RIB2-SURGE DOORS)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
540
FUEL TANK
640
FUEL TANK
148AZ, 540AB, 540BZ, 640AB, 640BZ, 734, 744
147AZ
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 28-00-00-000-001-A
Removal of the Fuel Pipes
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 28-42-15-000-005-A
Removal of the Wing-Tank Fuel-Quantity Probes
TASK 32-12-00-010-001-A
Open the Main Gear Doors for Access
TASK 57-17-11-000-001-A
Removal of Access Cover 147AZ(148AZ)
TASK 57-17-11-000-001-B
Removal of Access Cover 148AZ or/and the ACT-Equipment Support Door
TASK 57-27-11-000-001-A
Removal of the Access Panel
F Main-Transfer-System Clack Valve - Location and Detail
3. Job Set-up
Subtask 28-26-44-941-051-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.
   (3) Put a WARNING NOTICE(S) in position to tell persons not to operate the landing gear doors.
Subtask 28-26-44-650-050-A ** ON A/C NOT FOR ALL
B. Fuel Configuration
   (1) Defuel the applicable fuel tanks (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 28-26-44-865-050-A ** ON A/C NOT FOR ALL
C. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VUFUEL/L WING TK/PUMP2 SPLY7QAN26
121VUFUEL/L WING TK/PUMP1 SPLY1QAN23
121VUFUEL/R WING TK/PUMP2 SPLY8QAQ26
121VUFUEL/R WING TK/PUMP1 SPLY2QAQ23
121VUFUEL/CTR TK/AUTO/CTL3QLR27
121VUFUEL/CTR TK/L&R XFR/CTL & IND2QLR26
121VUFUEL/CTR TK/L&R XFR/CTL & IND1QLR25
123VUL WING TK/PUMP 1/STBY SPLY11QAAD12
123VUR WING TK/PUMP 1/STBY SPLY12QAAE12
Subtask 28-26-44-010-050-A ** ON A/C NOT FOR ALL
D. Get Access
   (1) Open the applicable MLG door (Ref. AMM TASK 32-12-00-010-001):
  • for the LH wing, open the door 734
  • for the RH wing, open the door 744.
   (2) Make sure that the 460005835 SLEEVE - GROUND LOCK is on the applicable MLG door actuator.
   (3) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE below the applicable access panel:
  • for the LH wing, below the panel 147AZ
  • for the RH wing, below the panel 148AZ
   (4) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE below the applicable access panel:
  • for the LH wing, below the panel 540AB
  • for the RH wing, below the panel 640AB.
   (5) Remove the applicable access panels (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-001), (Ref. AMM TASK 57-17-11-000-001):
   (6) Safety open the applicable spring-loaded surge-doors with the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS):
  • for the LH wing, safety open the door 540BZ
  • for the RH wing, safety open the door 640BZ.
   (7) If necessary, remove the applicable Fuel Quantity Indicating (FQI) probe (Ref. AMM TASK 28-42-15-000-005):
  • for the LH wing, remove the FQI probe 54QT1
  • for the RH wing, remove the FQI probe 54QT2.
   (8) Remove fuel pipes, as necessary, to get access to the applicable clack valve (Ref. AMM TASK 28-00-00-000-001).
Subtask 28-26-44-010-050-B ** ON A/C NOT FOR ALL
D. Get Access
   (1) Open the applicable MLG door (Ref. AMM TASK 32-12-00-010-001):
  • for the LH wing, open the door 734
  • for the RH wing, open the door 744.
   (2) Make sure that the 460005835 SLEEVE - GROUND LOCK is on the applicable MLG door actuator.
   (3) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE below the access panel 148AZ.
   (4) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE below the applicable access panel:
  • for the LH wing, below the panel 540AB
  • for the RH wing, below the panel 640AB.
   (5) Remove the applicable access panels (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-001), (Ref. AMM TASK 57-17-11-000-001):
  • for the LH wing, remove the panel 540AB
   (6) Safety open the applicable spring-loaded surge-doors with the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS):
  • for the LH wing, safety open the door 540BZ
  • for the RH wing, safety open the door 640BZ.
   (7) If necessary, remove the applicable Fuel Quantity Indicating (FQI) probe (Ref. AMM TASK 28-42-15-000-005):
  • for the LH wing, remove the FQI probe 54QT1
  • for the RH wing, remove the FQI probe 54QT2.
   (8) Remove fuel pipes, as necessary, to get access to the applicable clack valve (Ref. AMM TASK 28-00-00-000-001).
4. Procedure
Subtask 28-26-44-020-050-A ** ON A/C NOT FOR ALL
A. Removal of the Main-Transfer-System Clack Valve
   (1) Remove the nut (17). Remove the bolt (28), the washer (18), the bonding strap (15) and the washer (19). Remove the washer (27) from the bolt (28).
   (2) Remove the nuts (20) and the bolts (25).
   (3) Remove the shroud assembly (16).
   (4) Remove the spindle (12), the distance tubes (14) and (21) and the clack valve assembly (13).
   (5) Remove the nuts (22), the bolts (26) and the washers (23).
   (6) Remove the seating (11).
   (7) Remove and discard the O-ring (10).
   (8) Remove the nuts (9), the bolts (5) and the washers (6) and (8).
   (9) Remove the adaptor (24).
   (10) Remove and discard the O-ring (7).
   (11) Release the nut (2).
   (12) Remove the split ring (3) and the nut (2) from the flanged pipe (30).
   (13) Remove the flanged pipe (30).
   (14) Remove and discard the O-rings (4) and (29).
   (15) Install a CAP - BLANKING in the open end of the pipe (1).
[Rev.10 from 2021] 2026.04.02 06:17:46 UTC
"WTRUIB" 2025