DOC AIRBUS | AMM A320FInstallation of the Check Valve
TASK 29-12-37-400-002-A
Installation of the Check Valve
Self Explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Expendable Parts
E. Referenced Information
3. Job Set-up
Subtask 29-12-37-941-059-A
Subtask 29-12-37-420-055-A
Subtask 29-12-37-865-058-A
[Rev.10 from 2021]
2026.04.01 00:19:18 UTC
Installation of the Check Valve
WARNING:
MAKE SURE THAT THE FLIGHT CONTROL SAFETY-LOCKS AND THE WARNING NOTICES ARE IN POSITION.
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.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
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 | SAFETY BARRIER(S) |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.02ABA1) | Phosphate Ester Hydraulic Fluid-General Power - - |
| (Material No.08BAA9) | Non Aqueous Cleaner-General - - |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [2170GM] (CHECK VALVE-FLAP WTB B RETURN, L WING) | |
| 575DB | |
| FOR [2405GM] (CHECK VALVE-FLAP WTB B RETURN, R WING) | |
| 675DB | |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| FOR [2405GM] (CHECK VALVE-FLAP WTB B RETURN, R WING) | ||
| 6 | TIE-CABLE | AIPC 29-15-05-38-010 |
| 6 | TIE-CABLE | AIPC 29-15-85-10-010 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 27-50-00-866-009-A | Retraction of the Flaps on the Ground |
| TASK 27-50-00-866-009-A-01 | Retraction of the Flaps/Slats on the Ground |
| TASK 27-51-00-710-001-A | Operational Test of the Wing Tip Brake and the Pressure Off Brake |
| TASK 27-60-00-866-002-A | Extension-Retraction of the Spoilers for Maintenance |
| TASK 27-80-00-866-005-A | Retracting the Slats on the Ground |
| TASK 29-00-00-864-001-A | Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action |
| TASK 29-00-00-910-002-A | Safety Procedures of the Hydraulic System |
| TASK 29-10-00-863-003-A | Pressurize the Blue Hydraulic System with a Hydraulic Ground Power-Cart |
| TASK 29-10-00-863-003-A-01 | Pressurize the Blue Hydraulic System with the Blue Electric Pump |
| TASK 29-10-00-864-003-A | Depressurize the Blue Hydraulic System |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
| TASK 57-51-37-000-004-A | Removal of the Access Panels 575AB(675AB), 575BB(675BB), 575CB(675CB), 575DB(675DB), 575EB(675EB), 575FB(675FB), 575GB(675GB), 575HB(675HB) |
| FOR [2170GM] (CHECK VALVE-FLAP WTB B RETURN, L WING) | |
| TASK 57-51-37-400-004-A | Installation of the Access Panels 575AB(675AB), 575BB(675BB), 575CB(675CB), 575DB(675DB), 575EB(675EB), 575FB(675FB), 575GB(675GB), 575HB(675HB) |
| FOR [2405GM] (CHECK VALVE-FLAP WTB B RETURN, R WING) | |
| TASK 57-51-37-400-004-A | Installation of the Access Panels 575AB(675AB), 575BB(675BB), 575CB(675CB), 575DB(675DB), 575EB(675EB), 575FB(675FB), 575GB(675GB), 575HB(675HB) |
Flap WTB Check Valve 2170GMSubtask 29-12-37-941-059-A
A. Safety Precautions
(2) Make sure that the SAFETY BARRIER(S) are in position.
(3) Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the Blue hydraulic system.
(4) Make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the flaps.
Subtask 29-12-37-860-054-A WARNING:
OBEY THE HYDRAULIC SAFETY PROCEDURES.
(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002). (2) Make sure that the SAFETY BARRIER(S) are in position.
(3) Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the Blue hydraulic system.
(4) Make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the flaps.
B. Aircraft Maintenance Configuration
(1) Make sure that the Blue hydraulic system is depressurized (Ref. AMM TASK 29-00-00-864-001).
(2) Make sure that the applicable hydraulic reservoir is depressurized (Ref. AMM TASK 29-14-00-614-001).
(3) Make sure that the flaps are fully extended (Ref. AMM TASK 27-80-00-866-005).
(4) Make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION is on the flap/slat control lever on the panel 114VU.
(5) Make sure that the No. 3 spoiler is in the maintenance position (Ref. AMM TASK 27-60-00-866-002).
(6) Make sure that the 98D27604000000 COLLAR-SAFETY, SPOILER or 98D27604004000 COLLAR SAFETY SPOILER is on the piston rod of the servo-control.
(7) Make sure that the ACCESS PLATFORM 4M (13 FT) is in position.
(8) Make sure that the applicable access panels 575DB(675DB) are removed (Ref. AMM TASK 57-51-37-000-004).
(9) Make sure that a CONTAINER 5 L (1.32 USGAL) below the applicable check valve.
Subtask 29-12-37-865-056-A (1) Make sure that the Blue hydraulic system is depressurized (Ref. AMM TASK 29-00-00-864-001).
(2) Make sure that the applicable hydraulic reservoir is depressurized (Ref. AMM TASK 29-14-00-614-001).
(3) Make sure that the flaps are fully extended (Ref. AMM TASK 27-80-00-866-005).
(4) Make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION is on the flap/slat control lever on the panel 114VU.
(5) Make sure that the No. 3 spoiler is in the maintenance position (Ref. AMM TASK 27-60-00-866-002).
(6) Make sure that the 98D27604000000 COLLAR-SAFETY, SPOILER or 98D27604004000 COLLAR SAFETY SPOILER is on the piston rod of the servo-control.
(7) Make sure that the ACCESS PLATFORM 4M (13 FT) is in position.
(8) Make sure that the applicable access panels 575DB(675DB) are removed (Ref. AMM TASK 57-51-37-000-004).
(9) Make sure that a CONTAINER 5 L (1.32 USGAL) below the applicable check valve.
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/SEC1/NORM/SPLY | 21CE1 | B08 |
| 49VU | FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1 | 6CV | B07 |
| ** ON A/C ALL | |||
| 49VU | HYD/HYD PWR/B WARN/& CTL | 2702GJ | C12 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/SEC1/NORM/SPLY | 21CE1 | B03 |
| 49VU | FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1 | 6CV | B02 |
| ** ON A/C ALL | |||
| 105VU | FLT CTL/SEC1/STBY SPLY | 22CE | B01 |
| 121VU | FLIGHT CONTROLS/WTB/FLP/SYS2 | 12CV | P20 |
| 121VU | FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2 | 8CV | Q21 |
| 121VU | FLIGHT CONTROLS/SEC3/SPLY | 21CE3 | Q19 |
| 121VU | FLIGHT CONTROLS/SEC2/SPLY | 21CE2 | Q18 |
| 122VU | FLIGHT CONTROLS/WTB/FLP/SYS1 | 10CV | S07 |
| 123VU | B HYD/ELEC PUMP | 2701GJ | AB09 |
Subtask 29-12-37-420-055-A
A. Preparation for Installation
(2) Clean the component interfaces and the adjacent area with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Do an inspection of the component interfaces and the adjacent area.
Subtask 29-12-37-420-052-B WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
(1) Remove the blanking caps from the line ends. (2) Clean the component interfaces and the adjacent area with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Do an inspection of the component interfaces and the adjacent area.
B. Installation of the Check Valve
(1) Apply Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to the threads of the applicable check valve (2) and the coupling nuts (1), (3) and (5).
(a) FOR [2170GM] (CHECK VALVE-FLAP WTB B RETURN, L WING)
1 Attach the check valve (2) to the coupling nut (1).
2 Install the pipe (4) and attach it with the coupling nuts (3) and (5).
(b) FOR [2405GM] (CHECK VALVE-FLAP WTB B RETURN, R WING)
1 Attach the check valve (2) to the coupling nut (1).
2 Install the pipe (4) and attach it with the coupling nuts (3) and (5).
3 Attach the clamp (11) to the bracket and the pipe with the sleeves (10), the bolts (12), the spring washers (9) and the nuts (8).
4 Install the support plug (7) to the two pipes and secure it with a new AIPC 29-15-05-38-010 TIE-CABLE (6) or AIPC 29-15-85-10-010 TIE-CABLE (6).
Subtask 29-12-37-865-057-A (1) Apply Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to the threads of the applicable check valve (2) and the coupling nuts (1), (3) and (5).
(a) FOR [2170GM] (CHECK VALVE-FLAP WTB B RETURN, L WING)
1 Attach the check valve (2) to the coupling nut (1).
2 Install the pipe (4) and attach it with the coupling nuts (3) and (5).
(b) FOR [2405GM] (CHECK VALVE-FLAP WTB B RETURN, R WING)
1 Attach the check valve (2) to the coupling nut (1).
2 Install the pipe (4) and attach it with the coupling nuts (3) and (5).
3 Attach the clamp (11) to the bracket and the pipe with the sleeves (10), the bolts (12), the spring washers (9) and the nuts (8).
4 Install the support plug (7) to the two pipes and secure it with a new AIPC 29-15-05-38-010 TIE-CABLE (6) or AIPC 29-15-85-10-010 TIE-CABLE (6).
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 29-12-37-863-051-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/SEC1/NORM/SPLY | 21CE1 | B08 |
| 49VU | FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1 | 6CV | B07 |
| ** ON A/C ALL | |||
| 49VU | HYD/HYD PWR/B WARN/& CTL | 2702GJ | C12 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/SEC1/NORM/SPLY | 21CE1 | B03 |
| 49VU | FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1 | 6CV | B02 |
| ** ON A/C ALL | |||
| 105VU | FLT CTL/SEC1/STBY SPLY | 22CE | B01 |
| 121VU | FLIGHT CONTROLS/WTB/FLP/SYS2 | 12CV | P20 |
| 121VU | FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2 | 8CV | Q21 |
| 121VU | FLIGHT CONTROLS/SEC3/SPLY | 21CE3 | Q19 |
| 121VU | FLIGHT CONTROLS/SEC2/SPLY | 21CE2 | Q18 |
| 122VU | FLIGHT CONTROLS/WTB/FLP/SYS1 | 10CV | S07 |
| 123VU | B HYD/ELEC PUMP | 2701GJ | AB09 |
D. Pressurize the Hydraulic Systems
(1) Pressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-863-003).
Subtask 29-12-37-710-051-A (1) Pressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-863-003).
E. Test
(1) Do an operational test of the flap WTB (Ref. AMM TASK 27-51-00-710-001).
(2) Make sure the check valve (4) and the coupling nuts (1), (3) and (5) do not leak.
Subtask 29-12-37-864-057-A (1) Do an operational test of the flap WTB (Ref. AMM TASK 27-51-00-710-001).
(2) Make sure the check valve (4) and the coupling nuts (1), (3) and (5) do not leak.
F. Depressurize the Hydraulic Systems
(1) Depressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-864-003).
5. Close-up(1) Depressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-864-003).
Subtask 29-12-37-865-058-A
A. Open, safety and tag this(these) circuit breaker(s):
Subtask 29-12-37-410-051-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1 | 6CV | B07 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1 | 6CV | B02 |
| ** ON A/C ALL | |||
| 121VU | FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2 | 8CV | Q21 |
B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable access panel:
(a) FOR [2170GM] (CHECK VALVE-FLAP WTB B RETURN, L WING)
install 575DB (Ref. AMM TASK 57-51-37-400-004)
(b) FOR [2405GM] (CHECK VALVE-FLAP WTB B RETURN, R WING)
install 675DB (Ref. AMM TASK 57-51-37-400-004).
Subtask 29-12-37-865-059-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable access panel:
(a) FOR [2170GM] (CHECK VALVE-FLAP WTB B RETURN, L WING)
install 575DB (Ref. AMM TASK 57-51-37-400-004)
(b) FOR [2405GM] (CHECK VALVE-FLAP WTB B RETURN, R WING)
install 675DB (Ref. AMM TASK 57-51-37-400-004).
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 29-12-37-866-051-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1 | 6CV | B07 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1 | 6CV | B02 |
| ** ON A/C ALL | |||
| 121VU | FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2 | 8CV | Q21 |
D. Aircraft Configuration
(1) Retract the flaps fully (Ref. AMM TASK 27-50-00-866-009).
(2) Put the No. 3 spoiler back to the servicable condition (Ref. AMM TASK 27-60-00-866-002).
(3) On the servo-control, make sure that the pointer on the hex. head is opposite the letter '0' on the housing.
Subtask 29-12-37-942-051-A (1) Retract the flaps fully (Ref. AMM TASK 27-50-00-866-009).
(2) Put the No. 3 spoiler back to the servicable condition (Ref. AMM TASK 27-60-00-866-002).
(3) On the servo-control, make sure that the pointer on the hex. head is opposite the letter '0' on the housing.
E. Removal of Equipment
(1) Install the safety collar on the circuit breakers 10CV and 12CV.
(2) Remove the SAFETY BARRIER(S).
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(1) Install the safety collar on the circuit breakers 10CV and 12CV.
(2) Remove the SAFETY BARRIER(S).
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.