W DOC AIRBUS | AMM A320F

Check for Full and Free Movement of Clack Valves

TASK 28-11-00-200-001-A
Check for Full and Free Movement of Clack Valves

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
Refer to the MPD TASK: 281142-01
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
WARNING NOTICE(S)
98D57004013000
1
HOOK-COVER (RIB 2 SURGE DOORS)
98D57004014000
1
HOOK-COVER (RIB2-SURGE DOORS)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
540
FUEL TANK
640
FUEL TANK
540AB, 540AZ, 540BZ, 640AB, 640AZ, 640BZ
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 12-11-28-650-003-A
Pressure Refuel with Automatic Control
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
TASK 57-27-11-400-001-A
Installation of the Access Panel
F Clack Valves - Location and Detail
3. Job Set-up
Subtask 28-11-00-941-086-A
A. Safety Precautions
WARNING: OBEY THE SAFETY PROCEDURES WHEN YOU DO WORK IN A FUEL TANK.
   (1) You must obey the fuel safety procedures when you do work in a fuel tank (Ref. AMM TASK 28-10-00-910-001).
   (2) Put a WARNING NOTICE(S) in the cockpit to tell persons not to operate the flight controls.
   (3) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
Subtask 28-11-00-650-107-A
B. Fuel Configuration
   (1) Defuel the aircraft (Ref. AMM TASK 28-25-00-650-001).
   (2) Drain the fuel that remains, from the aircraft (Ref. AMM TASK 28-25-00-650-003).
Subtask 28-11-00-010-050-A
C. Get Access
   (1) Put the ACCESS PLATFORM 3M (10 FT) in position:

  • for the left wing, below zone 540
  • for the right wing, below zone 640.
   (2) Remove the applicable access panel (Ref. AMM TASK 57-27-11-000-001) and (Ref. AMM TASK 28-10-00-910-002):

   (3) Install the 98D57004013000 HOOK-COVER (RIB 2 SURGE DOORS) on the applicable forward surge door:

   (4) Install the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS) on the applicable aft surge door:

4. Procedure
Subtask 28-11-00-210-050-A
A. Check for Full and Free Movement of Clack Valves
   (1) Make sure that the clack valves at RIB2 operate freely and through their full movement.
5. Close-up
Subtask 28-11-00-410-072-A
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Remove the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS) from the applicable aft access door 540BZ 640BZ.
   (3) Carefully close the fuel surge doors 540BZ (640BZ).
   (4) Remove the 98D57004013000 HOOK-COVER (RIB 2 SURGE DOORS) from the applicable forward access door 540AZ 640AZ.
   (5) Carefully close the fuel surge doors 540AZ (640AZ).
   (6) Install the applicable access panel (Ref. AMM TASK 57-27-11-400-001):

Subtask 28-11-00-650-106-A
B. Fuel Configuration
   (1) Refuel the aircraft as necessary (Ref. AMM TASK 12-11-28-650-003).
Subtask 28-11-00-942-051-A
C. Removal of Equipment
   (1) Remove the safety barriers.
   (2) Remove the access platform(s).
   (3) Remove the WARNING NOTICE(S).
   (4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
[Rev.8 from Aug 2017] 2026.04.02 06:17:02 UTC
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