DOC AIRBUS | AMM A320FRemoval of the Check Valve
TASK 29-11-48-000-001-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 29-11-48-941-050-A
Subtask 29-11-48-020-050-A
[Rev.10 from 2021]
2026.04.01 00:16:36 UTC
Removal of the 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.
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 | 1 | ACCESS PLATFORM 4M (13 FT) |
| No specific | 1 | CONTAINER 5 L (1.32 USGAL) |
| No specific | AR | PLUG - BLANKING |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | WARNING NOTICE(S) |
| 98D27803500001 | 1 | LOCKING TOOL ZERO POS |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1410GM] (CHECK VALVE-SLAT WTB G RETURN, L WING) | |
| 522SB | |
| FOR [1411GM] (CHECK VALVE-SLAT WTB G RETURN, R WING) | |
| 622SB | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 27-80-00-866-005-A | Retracting the Slats on the Ground |
| TASK 29-00-00-910-002-A | Safety Procedures of the Hydraulic System |
| TASK 29-10-00-864-001-A | Depressurize the Green Hydraulic System |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
| TASK 29-23-00-860-001-A | Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU) |
Slat WTB Check Valves 1410GM(1411GM)Subtask 29-11-48-941-050-A
A. Safety Precautions
(2) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system.
(3) Put a WARNING NOTICE(S) in position to tell persons not to operate the slats.
Subtask 29-11-48-860-050-A WARNING:
OBEY THE HYDRAULIC SAFETY PROCEDURES.
(1) Obey the hydraulic safety precautions (Ref. AMM TASK 29-00-00-910-002). (2) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system.
(3) Put a WARNING NOTICE(S) in position to tell persons not to operate the slats.
B. Aircraft Maintenance Configuration
(1) Make sure that the slats are fully retracted (Ref. AMM TASK 27-80-00-866-005).
(2) On the panel 114VU, install the 98D27803500001 LOCKING TOOL ZERO POS on the slat/flap control lever.
(3) Disconnect the PTU isolation coupling (Ref. AMM TASK 29-23-00-860-001).
(4) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001).
(5) Depressurize the Green hydraulic-system reservoir (Ref. AMM TASK 29-14-00-614-001).
(6) Remove the safety collar from the circuit breakers 9CV and 11CV.
Subtask 29-11-48-865-050-A (1) Make sure that the slats are fully retracted (Ref. AMM TASK 27-80-00-866-005).
(2) On the panel 114VU, install the 98D27803500001 LOCKING TOOL ZERO POS on the slat/flap control lever.
(3) Disconnect the PTU isolation coupling (Ref. AMM TASK 29-23-00-860-001).
(4) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001).
(5) Depressurize the Green hydraulic-system reservoir (Ref. AMM TASK 29-14-00-614-001).
(6) Remove the safety collar from the circuit breakers 9CV and 11CV.
C. Open, safety and tag this(these) circuit breaker(s):
Subtask 29-11-48-010-050-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1 | 5CV | B06 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | HYDRAULIC/G HYD/PUMP ENG1/CTL | 1701GK | H12 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1 | 5CV | B01 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/CTL | 1701GK | R35 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/MONG | 1702GK | R34 |
| ** ON A/C ALL | |||
| 121VU | FLIGHT CONTROLS/WTB/SLT/SYS2 | 11CV | P19 |
| 121VU | FLIGHT CONTROLS/SLT/CTL/SYS2 | 7CV | R21 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/MONG | 1702GK | R33 |
| ** ON A/C ALL | |||
| 122VU | FLIGHT CONTROLS/WTB/SLT/SYS1 | 9CV | S06 |
D. Get Access
(1) Put an ACCESS PLATFORM 4M (13 FT) below the applicable access panel.
(2) Remove the applicable access panel:
(a) FOR [1410GM] (CHECK VALVE-SLAT WTB G RETURN, L WING)
remove 522SB
(b) FOR [1411GM] (CHECK VALVE-SLAT WTB G RETURN, R WING)
remove 622SB.
4. Procedure(1) Put an ACCESS PLATFORM 4M (13 FT) below the applicable access panel.
(2) Remove the applicable access panel:
(a) FOR [1410GM] (CHECK VALVE-SLAT WTB G RETURN, L WING)
remove 522SB
(b) FOR [1411GM] (CHECK VALVE-SLAT WTB G RETURN, R WING)
remove 622SB.
Subtask 29-11-48-020-050-A
A. Removal of the Check Valve
(2) Loosen and disconnect the coupling nuts (1) and (5). Remove the pipe (4).
(3) Remove the check valve (2) from the coupling nut (3).
(4) Put the PLUG-BLANKING in each disconnected line end.
(5) Remove the CONTAINER 5 L (1.32 USGAL) and correctly discard the hydraulic fluid.
WARNING:
DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:
- FLUSH IT AWAY WITH CLEAN WATER
- GET MEDICAL AID.
CAUTION:
MAKE SURE THAT THE FLUID DOES NOT STAY ON THE AIRCRAFT STRUCTURE. IF THE FLUID GETS ON THE AIRCRAFT STRUCTURE, WASH IT OFF IMMEDIATELY WITH SOAP AND WATER.
(1) Put a CONTAINER 5 L (1.32 USGAL) below the applicable check valve. (2) Loosen and disconnect the coupling nuts (1) and (5). Remove the pipe (4).
(3) Remove the check valve (2) from the coupling nut (3).
(4) Put the PLUG-BLANKING in each disconnected line end.
(5) Remove the CONTAINER 5 L (1.32 USGAL) and correctly discard the hydraulic fluid.