DOC AIRBUS | AMM A320FLeak Test between Equipments and Accessory Gearbox (AGB) Pad [CFML]
TASK 71-00-00-790-807-A
Leak Test between Equipments and Accessory Gearbox (AGB) Pad
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 71-00-00-941-160-A
Subtask 71-00-00-410-195-A
[Rev.10 from 2021]
2026.04.01 13:14:48 UTC
Leak Test between Equipments and Accessory Gearbox (AGB) Pad
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
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 | AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY |
| No specific | 1 | CONTAINER 5 L (1.32 USGAL) |
| No specific | AR | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 255 and 200 lbf.in (2.88 and 2.26 m.daN )  | |
| No specific | Torque wrench: range to between 300 and 262 lbf.in (3.39 and 2.96 m.daN ) | |
| 956A6621G01 | 1 | TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP2442) | engine oil |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1) | |
| 437AL, 438AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2) | |
| 447AL, 448AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-00-00-710-815-A | Idle Leak Check |
| TASK 71-13-00-010-803-A | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-803-A | Closing of the Fan Cowl Doors |
Leak Test between Equipments and Accessory Gearbox PadSubtask 71-00-00-941-160-A
A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put a WARNING NOTICE(S) in position to tell persons not to operate:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
Subtask 71-00-00-010-210-A (1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put a WARNING NOTICE(S) in position to tell persons not to operate:
- The ENG/MODE selector switch
- The ENG/MASTER 1(2) control switch.
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
4. Procedure(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
WARNING:
USE PERSONAL PROTECTION EQUIPMENT. USE THE ENGINE OIL IN A WELL-VENTILATED AREA. ENGINE OIL IS TOXIC.
Subtask 71-00-00-790-071-A A. Leak Test between Equipments and Accessory Gearbox (AGB) Pad
(1) Put a CONTAINER 5 L (1.32 USGAL) below the AGB (1).
(2) Leak test between Integrated Drive Generator (IDG) (2) and the IDG pad (3).
(a) Disconnection of the IDG pad drain tube (5).
1 Loosen the threads of the coupling nut (6) to disconnect the IDG pad drain tube (5) from the nipple (4) of IDG pad (3).
(b) Installation of the sealing tool:
1 Remove the storage plugs from the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
2 Connect the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to the nipple (4) of the IDG pad (3).
3 TORQUE the coupling nut (8) of the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to between 300 and 262 lbf.in (3.39 and 2.96 m.daN ).
4 Connect the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to the AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY (10).
5 TORQUE the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to between 255 and 200 lbf.in (2.88 and 2.26 m.daN ).
(c) Do the leak test as follows:
2 Close the isolation valve (11) to isolate the AGB cavity.
3 Do a check of the sealing cavity.
4 If there is a quick decrease in pressure, replace the O-ring.
7 If there is no pressure decrease during one minute test, remove the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
(d) Removal of the sealing tool:
1 Remove the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY from the AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY (10).
2 Loosen the threads of the coupling nut (8) to disconnect the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY from the nipple (4) of the IDG pad (3).
3 Remove the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
4 Install the storage plugs on the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
(e) Connection of the IDG pad drain tube (5):
1 Lubricate the threads of the coupling nut (6) with the engine oil (Material No.CP2442) .
2 Connect the IDG pad drain tube (5) to the nipple (4) of the IDG pad (3).
3 TORQUE the coupling nut (6) to between 300 and 262 lbf.in (3.39 and 2.96 m.daN ).
(3) Leak test between manual control cover (12) and the manual control pad (13).
(a) Disconnection of the manual control pad drain tube (15).
1 Loosen the threads of the coupling nut (16) to disconnect the manual control pad drain tube (15) from the nipple (14) of the manual control pad (13).
(b) Installation of the sealing tool:
1 Remove the storage plugs from the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
2 Connect the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to the nipple (14) of the manual control pad (13).
3 TORQUE the coupling nut (8) of the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to between 300 and 262 lbf.in (3.39 and 2.96 m.daN ).
4 Connect the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to the AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY (10).
5 TORQUE the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to between 255 and 200 lbf.in (2.88 and 2.26 m.daN ).
(c) Do the leak test as follows:
2 Close the isolation valve (11) to isolate the AGB cavity.
3 Do a check of the sealing cavity.
4 If there is a quick decrease in pressure, replace the O-ring.
7 If there is no pressure decrease during one minute test, remove the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
(d) Removal of the sealing tool:
1 Remove the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY from the AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY (10).
2 Loosen the threads of the coupling nut (8) to disconnect the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY from the nipple (14) of the manual control pad (13).
3 Remove the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
4 Install the storage plugs on the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
(e) Connection of the manual drive pad drain tube (15):
1 Lubricate the threads of the coupling nut (16) with the engine oil (Material No.CP2442) .
2 Connect the manual control pad drain tube (15) to the nipple (14) of the manual control pad (13).
3 TORQUE the coupling nut (16) to between 300 and 262 lbf.in (3.39 and 2.96 m.daN ).
(4) Leak test between hydraulic pump (17) and the hydraulic pump pad (18).
(a) Disconnection of the hydraulic pump pad drain tube (20).
1 Loosen the threads of the coupling nut (21) to disconnect the hydraulic pump pad drain tube (20) from the nipple (19) of the hydraulic pump pad (18).
(b) Installation of the sealing tool:
1 Remove the storage plugs from the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
2 Connect the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to the nipple (19) of the hydraulic pump pad (18).
3 TORQUE the coupling nut (8) of the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to between 300 and 262 lbf.in (3.39 and 2.96 m.daN ).
4 Connect the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to the AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY (10).
5 TORQUE the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to between 255 and 200 lbf.in (2.88 and 2.26 m.daN ).
(c) Do the leak test as follows:
2 Close the isolation valve (11) to isolate the AGB cavity.
3 Do a check of the sealing cavity.
4 If there is a quick decrease in pressure, replace the O-ring.
7 If there is no pressure decrease during one minute test, remove the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
(d) Removal of the sealing tool:
1 Remove the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY from the AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY (10).
2 Loosen the threads of the coupling nut (8) to disconnect the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY from the nipple (19) of the hydraulic pump pad (18).
3 Remove the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
4 Install the storage plugs on the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
(e) Connection of the hydraulic pump pad drain tube (20):
1 Lubricate the threads of the coupling nut (21) with the engine oil (Material No.CP2442) .
2 Connect the hydraulic pump pad drain tube (20) to the nipple (19) of the hydraulic pump pad (18).
3 TORQUE the coupling nut (21) to between 300 and 262 lbf.in (3.39 and 2.96 m.daN ).
(5) Leak test between fuel pump (22) and the fuel pump pad (23).
(a) Disconnection of the fuel pump pad drain tube (25).
1 Loosen the threads of the coupling nut (26) to disconnect the fuel pump pad drain tube (25) from the fuel pump pad (23).
2 Remove the fuel pump pad drain tube (25) from the nipple (24) of the fuel pump pad (23).
(b) Installation of the sealing tool:
1 Remove the storage plugs from the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
2 Connect the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to the nipple (24) of the fuel pump pad (23).
3 TORQUE the coupling nut (8) of the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to between 300 and 262 lbf.in (3.39 and 2.96 m.daN ).
4 Connect the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to the AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY (10).
5 TORQUE the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to between 255 and 200 lbf.in (2.88 and 2.26 m.daN ).
(c) Do the leak test as follows:
2 Close the isolation valve (11) to isolate the AGB cavity.
3 Do a check of the sealing cavity.
4 If there is a quick decrease in pressure, replace the O-ring.
7 If there is no pressure decrease during one minute test, remove the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY
(d) Removal of the sealing tool:
1 Remove the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY from the AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY (10).
2 Loosen the threads of the coupling nut (8) to disconnect the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY from the nipple (24) of the fuel pump pad (23).
3 Remove the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
4 Install the storage plugs on the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
(e) Connection of the fuel pump pad drain tube (25):
1 Lubricate the threads of the coupling nut (26) with the engine oil (Material No.CP2442) .
2 Connect the fuel pump pad drain tube (25) to the nipple (24) of the fuel pump pad (23).
3 TORQUE the coupling nut (26) to between 300 and 262 lbf.in (3.39 and 2.96 m.daN ).
(6) Remove the CONTAINER 5 L (1.32 USGAL) kept below the AGB (1).
Subtask 71-00-00-710-272-A 5. Close-up(1) Put a CONTAINER 5 L (1.32 USGAL) below the AGB (1).
(2) Leak test between Integrated Drive Generator (IDG) (2) and the IDG pad (3).
(a) Disconnection of the IDG pad drain tube (5).
1 Loosen the threads of the coupling nut (6) to disconnect the IDG pad drain tube (5) from the nipple (4) of IDG pad (3).
(b) Installation of the sealing tool:
1 Remove the storage plugs from the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
2 Connect the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to the nipple (4) of the IDG pad (3).
3 TORQUE the coupling nut (8) of the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to between 300 and 262 lbf.in (3.39 and 2.96 m.daN )
. 4 Connect the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to the AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY (10).
5 TORQUE the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to between 255 and 200 lbf.in (2.88 and 2.26 m.daN )
. (c) Do the leak test as follows:
CAUTION:
DO NOT OVERPRESSURIZE THE CAVITY. IF YOU PRESSURIZE IT TO MORE THAN 199.95 KPA (29 PSI), MAG SEAL SEPARATION CAN OCCUR.
1 Open the AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY (10) to pressurize the cavity between 9.5 psi (0.66 bar) and 10 psi (0.69 bar). 2 Close the isolation valve (11) to isolate the AGB cavity.
3 Do a check of the sealing cavity.
4 If there is a quick decrease in pressure, replace the O-ring.
NOTE: A quick pressure decrease indicates a damaged O-ring.
5 If it is difficult to isolate cavity and maintain pressure, install a new O-ring. NOTE: Difficulties to isolate cavity and maintain pressure indicates a missing O-ring.
6 Do the leak test again. Refer to step 4.A.(2)(c). 7 If there is no pressure decrease during one minute test, remove the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
(d) Removal of the sealing tool:
1 Remove the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY from the AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY (10).
2 Loosen the threads of the coupling nut (8) to disconnect the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY from the nipple (4) of the IDG pad (3).
3 Remove the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
4 Install the storage plugs on the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
(e) Connection of the IDG pad drain tube (5):
1 Lubricate the threads of the coupling nut (6) with the engine oil (Material No.CP2442) .
2 Connect the IDG pad drain tube (5) to the nipple (4) of the IDG pad (3).
3 TORQUE the coupling nut (6) to between 300 and 262 lbf.in (3.39 and 2.96 m.daN )
. (3) Leak test between manual control cover (12) and the manual control pad (13).
(a) Disconnection of the manual control pad drain tube (15).
1 Loosen the threads of the coupling nut (16) to disconnect the manual control pad drain tube (15) from the nipple (14) of the manual control pad (13).
(b) Installation of the sealing tool:
1 Remove the storage plugs from the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
2 Connect the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to the nipple (14) of the manual control pad (13).
3 TORQUE the coupling nut (8) of the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to between 300 and 262 lbf.in (3.39 and 2.96 m.daN )
. 4 Connect the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to the AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY (10).
5 TORQUE the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to between 255 and 200 lbf.in (2.88 and 2.26 m.daN )
. (c) Do the leak test as follows:
CAUTION:
DO NOT OVERPRESSURIZE THE CAVITY. IF YOU PRESSURIZE IT TO MORE THAN 199.95 KPA (29 PSI), MAG SEAL SEPARATION CAN OCCUR.
1 Open the AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY (10) to pressurize the cavity between 9.5 psi (0.66 bar) and 10 psi (0.69 bar). 2 Close the isolation valve (11) to isolate the AGB cavity.
3 Do a check of the sealing cavity.
4 If there is a quick decrease in pressure, replace the O-ring.
NOTE: A quick pressure decrease indicates a damaged O-ring.
5 If it is difficult to isolate cavity and maintain pressure, install a new O-ring. NOTE: Difficulties to isolate cavity and maintain pressure indicates a missing O-ring.
6 Do the leak test again. Refer to step 4.A.(3)(c). 7 If there is no pressure decrease during one minute test, remove the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
(d) Removal of the sealing tool:
1 Remove the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY from the AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY (10).
2 Loosen the threads of the coupling nut (8) to disconnect the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY from the nipple (14) of the manual control pad (13).
3 Remove the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
4 Install the storage plugs on the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
(e) Connection of the manual drive pad drain tube (15):
1 Lubricate the threads of the coupling nut (16) with the engine oil (Material No.CP2442) .
2 Connect the manual control pad drain tube (15) to the nipple (14) of the manual control pad (13).
3 TORQUE the coupling nut (16) to between 300 and 262 lbf.in (3.39 and 2.96 m.daN )
. (4) Leak test between hydraulic pump (17) and the hydraulic pump pad (18).
(a) Disconnection of the hydraulic pump pad drain tube (20).
1 Loosen the threads of the coupling nut (21) to disconnect the hydraulic pump pad drain tube (20) from the nipple (19) of the hydraulic pump pad (18).
(b) Installation of the sealing tool:
1 Remove the storage plugs from the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
2 Connect the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to the nipple (19) of the hydraulic pump pad (18).
3 TORQUE the coupling nut (8) of the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to between 300 and 262 lbf.in (3.39 and 2.96 m.daN )
. 4 Connect the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to the AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY (10).
5 TORQUE the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to between 255 and 200 lbf.in (2.88 and 2.26 m.daN )
. (c) Do the leak test as follows:
CAUTION:
DO NOT OVERPRESSURIZE THE CAVITY. IF YOU PRESSURIZE IT TO MORE THAN 199.95 KPA (29 PSI), MAG SEAL SEPARATION CAN OCCUR.
1 Open the AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY (10) to pressurize the cavity between 9.5 psi (0.66 bar) and 10 psi (0.69 bar). 2 Close the isolation valve (11) to isolate the AGB cavity.
3 Do a check of the sealing cavity.
4 If there is a quick decrease in pressure, replace the O-ring.
NOTE: A quick pressure decrease indicates a damaged O-ring.
5 If it is difficult to isolate cavity and maintain pressure, install a new O-ring. NOTE: Difficulties to isolate cavity and maintain pressure indicates a missing O-ring.
6 Do the leak test again. Refer to step 4.A.(4)(c). 7 If there is no pressure decrease during one minute test, remove the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
(d) Removal of the sealing tool:
1 Remove the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY from the AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY (10).
2 Loosen the threads of the coupling nut (8) to disconnect the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY from the nipple (19) of the hydraulic pump pad (18).
3 Remove the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
4 Install the storage plugs on the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
(e) Connection of the hydraulic pump pad drain tube (20):
1 Lubricate the threads of the coupling nut (21) with the engine oil (Material No.CP2442) .
2 Connect the hydraulic pump pad drain tube (20) to the nipple (19) of the hydraulic pump pad (18).
3 TORQUE the coupling nut (21) to between 300 and 262 lbf.in (3.39 and 2.96 m.daN )
. (5) Leak test between fuel pump (22) and the fuel pump pad (23).
(a) Disconnection of the fuel pump pad drain tube (25).
1 Loosen the threads of the coupling nut (26) to disconnect the fuel pump pad drain tube (25) from the fuel pump pad (23).
2 Remove the fuel pump pad drain tube (25) from the nipple (24) of the fuel pump pad (23).
(b) Installation of the sealing tool:
1 Remove the storage plugs from the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
2 Connect the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to the nipple (24) of the fuel pump pad (23).
3 TORQUE the coupling nut (8) of the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to between 300 and 262 lbf.in (3.39 and 2.96 m.daN )
. 4 Connect the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to the AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY (10).
5 TORQUE the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY to between 255 and 200 lbf.in (2.88 and 2.26 m.daN )
. (c) Do the leak test as follows:
CAUTION:
DO NOT OVERPRESSURIZE THE CAVITY. IF YOU PRESSURIZE IT TO MORE THAN 199.95 KPA (29 PSI), MAG SEAL SEPARATION CAN OCCUR.
1 Open the AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY (10) to pressurize the cavity between 9.5 psi (0.66 bar) and 10 psi (0.69 bar). 2 Close the isolation valve (11) to isolate the AGB cavity.
3 Do a check of the sealing cavity.
4 If there is a quick decrease in pressure, replace the O-ring.
NOTE: A quick pressure decrease indicates a damaged O-ring.
5 If it is difficult to isolate cavity and maintain pressure, install a new O-ring. NOTE: Difficulties to isolate cavity and maintain pressure indicates a missing O-ring.
6 Do the leak test again. Refer to step 4.A.(5)(c). 7 If there is no pressure decrease during one minute test, remove the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY
(d) Removal of the sealing tool:
1 Remove the flexible hose (9) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY from the AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY (10).
2 Loosen the threads of the coupling nut (8) to disconnect the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY from the nipple (24) of the fuel pump pad (23).
3 Remove the flexible hose (7) of the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
4 Install the storage plugs on the 956A6621G01 TOOL SET, LEAK TEST - AGB/EQUIPMENT CAVITY.
(e) Connection of the fuel pump pad drain tube (25):
1 Lubricate the threads of the coupling nut (26) with the engine oil (Material No.CP2442) .
2 Connect the fuel pump pad drain tube (25) to the nipple (24) of the fuel pump pad (23).
3 TORQUE the coupling nut (26) to between 300 and 262 lbf.in (3.39 and 2.96 m.daN )
. (6) Remove the CONTAINER 5 L (1.32 USGAL) kept below the AGB (1).
Subtask 71-00-00-410-195-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(3) Remove the WARNING NOTICE(S).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(3) Remove the WARNING NOTICE(S).