DOC AIRBUS | AMM A320FRemoval of the Check Valve
TASK 28-12-44-000-004-A
Removal of the Check Valve
Self Explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 28-12-44-941-064-A
Subtask 28-12-44-020-053-A
[Rev.10 from 2021]
2026.04.02 07:02:02 UTC
Removal of the Check Valve
WARNING:
OBEY THE FUEL SAFETY PROCEDURES.
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.
WARNING:
BE CAREFUL NOT TO GET AIRCRAFT FUEL IN YOUR MOUTH OR IN YOUR EYES.
IF YOU GET FUEL ON YOUR SKIN OR ON YOUR CLOTHES, FLUSH IT IMMEDIATELY WITH WATER.
IF NECESSARY, GET MEDICAL HELP.
AIRCRAFT FUEL IS POISONOUS.
WARNING:
DO NOT GET YOUR CLOTHES SOAKED WITH FUEL.
WARNING:
MAKE SURE THAT YOU HAVE THE CORRECT FIRE FIGHTING EQUIPMENT AVAILABLE.
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.
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 JobSelf Explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE |
| No specific | AR | SAFETY BARRIER(S) |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 140 | CENTER WING |
| 147AZ |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 28-00-00-910-001-A | Fuel Safety Procedures |
| 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 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 |
Subtask 28-12-44-941-064-A
A. Safety Precautions
(1) Obey the fuel safety procedures (Ref. AMM TASK 28-00-00-910-001).
(2) Obey the safety procedures when you do work in a fuel tank (Ref. AMM TASK 28-10-00-910-001).
(3) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(4) Put a WARNING NOTICE(S) in position to tell persons not to operate the Main Landing Gear (MLG) doors.
Subtask 28-12-44-860-056-A (1) Obey the fuel safety procedures (Ref. AMM TASK 28-00-00-910-001).
(2) Obey the safety procedures when you do work in a fuel tank (Ref. AMM TASK 28-10-00-910-001).
(3) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(4) Put a WARNING NOTICE(S) in position to tell persons not to operate the Main Landing Gear (MLG) doors.
B. Aircraft Maintenance Configuration
(1) Defuel the center tank (Ref. AMM TASK 28-25-00-650-001).
(2) Drain the remaining fuel from the center tank (Ref. AMM TASK 28-25-00-650-003).
Subtask 28-12-44-010-053-A ** ON A/C NOT FOR ALL (1) Defuel the center tank (Ref. AMM TASK 28-25-00-650-001).
(2) Drain the remaining fuel from the center tank (Ref. AMM TASK 28-25-00-650-003).
C. Get Access
Check Valve 50QM(51QM) 52QM(53QM) 120QM(121QM) 93QM ** ON A/C NOT FOR ALL
Check Valve 50QM(51QM) 120QM(121QM) 93QM ** ON A/C NOT FOR ALL
(2) Make sure that the 460005835 SLEEVE - GROUND LOCK is installed on the LH MLG door actuator.
(3) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE below access panel 147AZ or the ACT-Equipment Support Door.
(4) Remove access panel 147AZ or the ACT-Equipment Support Door (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-17-11-000-001).
Subtask 28-12-44-010-053-C ** ON A/C NOT FOR ALL Check Valve 50QM(51QM) 52QM(53QM) 120QM(121QM) 93QM ** ON A/C NOT FOR ALL Check Valve 50QM(51QM) 120QM(121QM) 93QM ** ON A/C NOT FOR ALL WARNING:
MAKE SURE THAT THE TRAVEL RANGES OF THE LANDING GEAR DOORS ARE CLEAR.
(1) Open the LH MLG door (Ref. AMM TASK 32-12-00-010-001). (2) Make sure that the 460005835 SLEEVE - GROUND LOCK is installed on the LH MLG door actuator.
(3) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE below access panel 147AZ or the ACT-Equipment Support Door.
(4) Remove access panel 147AZ or the ACT-Equipment Support Door (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-17-11-000-001).
C. Get Access
(2) Make sure that the 460005835 SLEEVE - GROUND LOCK is installed on the LH MLG door actuator.
(3) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE below the ACT-Equipment Support Door.
(4) Remove the ACT-Equipment Support Door (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-17-11-000-001).
Subtask 28-12-44-865-057-A WARNING:
MAKE SURE THAT THE TRAVEL RANGES OF THE LANDING GEAR DOORS ARE CLEAR.
(1) Open the LH MLG door (Ref. AMM TASK 32-12-00-010-001). (2) Make sure that the 460005835 SLEEVE - GROUND LOCK is installed on the LH MLG door actuator.
(3) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE below the ACT-Equipment Support Door.
(4) Remove the ACT-Equipment Support Door (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-17-11-000-001).
D. Open, safety and tag this(these) circuit breaker(s):
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | FUEL/HI/LVL/SPLY | 1QJ | L25 |
| 121VU | FUEL/RFL/DFL/SPLY | 2QU | L24 |
| 121VU | FUEL/RFL/DFL/XFR/DEFUEL/VALVE | 1QU | L23 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | ACT PUMP SUPPLY | 25QH | Q29 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | FUEL/ACT AIR SOV/MAN/SPLY | 64QH | J20 |
| 121VU | FUEL/ACT AIR SOV/AUTO/SPLY | 63QH | J19 |
| 121VU | FUEL/ACT XFR VLV/MOT2 | 66QH | J18 |
| 121VU | FUEL/ACT XFR VLV/MOT1 | 65QH | J17 |
| 121VU | FUEL/HI/LVL/SPLY | 1QJ | L24 |
| 121VU | FUEL/RFL/DFL/SPLY | 2QU | L23 |
| 121VU | FUEL/RFL/DFL/XFR/DEFUEL/VALVE | 1QU | L22 |
| 121VU | FUEL/ACT VENT VLV/MAN/SPLY | 62QH | L21 |
| 121VU | FUEL/ACT VENT VLV/AUTO/SPLY | 61QH | L20 |
| 121VU | FUEL/ACT/FUEL PUMP/SPLY | 25QH | Q29 |
Subtask 28-12-44-020-053-A
A. Removal of the Check Valve
Check Valve 50QM(51QM) 52QM(53QM) 120QM(121QM) 93QM ** ON A/C NOT FOR ALL
Check Valve 50QM(51QM) 120QM(121QM) 93QM ** ON A/C NOT FOR ALL
(1) Loosen the clamp (2) and move it along the pipe (1) away from the check-valve (3).
(2) Remove the check-valve (3) from the pipe (1) and remove the clamp (2).
Check Valve 50QM(51QM) 52QM(53QM) 120QM(121QM) 93QM ** ON A/C NOT FOR ALL Check Valve 50QM(51QM) 120QM(121QM) 93QM ** ON A/C NOT FOR ALL (2) Remove the check-valve (3) from the pipe (1) and remove the clamp (2).