DOC AIRBUS | AMM A320FInstallation of the Gearbox Breather Outlet Duct [IAE]
TASK 71-13-16-400-012-B
Installation of the Gearbox Breather Outlet Duct
This TASK is for V2500-A5 engines.
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 71-13-16-860-055-A ** ON A/C NOT FOR ALL
Subtask 71-13-16-420-055-A ** ON A/C NOT FOR ALL
Subtask 71-13-16-410-055-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:29:57 UTC
Installation of the Gearbox Breather Outlet Duct
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobThis TASK is for V2500-A5 engines.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 44 and 36 lbf.in (0.50 and 0.41 m.daN )  |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.V01-076) | Methyl Ethyl Ketone, Technical grade |
| (Material No.V08-024) | sealant |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-010-A | Opening of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 71-13-00-410-010-A | Closing of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 71-13-16-400-011-B | Installation of the Gearbox Breather Vent |
Gearbox Breather Outlet DuctSubtask 71-13-16-860-055-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
Subtask 71-13-16-010-062-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-010):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
4. Procedure(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-010):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
Subtask 71-13-16-420-055-A ** ON A/C NOT FOR ALL
A. Install the gearbox breather outlet duct
(1) Remove the caps from the gearbox breather outlet duct and the gearbox breather duct assembly (1).
(2) Clean the replacement parts
(a) Clean the replacement parts and their interfaces with a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist withV01-076 Methyl Ethyl Ketone, Technical grade
(3) Apply sealant
(a) Apply a thin layer of the sealant (Material No.V08-024) to the mating faces.
PRE SBN 71-0181
(4) Install the gearbox breather outlet duct (7). Install rivets (2) CR3532-5-2.
(5) Install the Hi-Lok bolt (4) into the applicable hole.
(6) Install the washer (5) and the nut (6) on the Hi-Lok bolt (4).
(7) TORQUE the nut (6) to between 44 and 36 lbf.in (0.50 and 0.41 m.daN ).
POST SBN 71-0181
(8) Put the gearbox breather outlet duct (7) and the bracket (8) in the correct position for installation. Install rivets (2) CR3532-5-2.
(9) Install the Hi-Lok bolt (4) into the applicable hole.
(10) Install the washer (5) and the nut (6) to the Hi-Lok bolt (4).
(11) TORQUE the nuts (6) to between 44 and 36 lbf.in (0.50 and 0.41 m.daN ).
(12) Apply the sealant (Material No.V08-024) as follows:
(a) Put the sealing compound through the drain hole in the fan cowl door (3) until you can see it around the edges and through the hole in the bracket (8).
(b) Fill the drain hole with sealing compound and make it smooth with the outer surface of the right fan cowl door (3).
(c) Apply a layer of sealants around the edges of the bracket (8).
(d) Let the sealant cure, refer to manufacturer's instructions.
END SBN 71-0181
(13) Remove any unwanted sealant from the right fan cowl door (3).
(14) Install the gearbox breather vent (Ref. AMM TASK 71-13-16-400-011).
Subtask 71-13-16-780-051-A ** ON A/C NOT FOR ALL (1) Remove the caps from the gearbox breather outlet duct and the gearbox breather duct assembly (1).
(2) Clean the replacement parts
(a) Clean the replacement parts and their interfaces with a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with
(3) Apply sealant
(a) Apply a thin layer of the sealant (Material No.V08-024) to the mating faces.
PRE SBN 71-0181
(4) Install the gearbox breather outlet duct (7). Install rivets (2) CR3532-5-2.
(5) Install the Hi-Lok bolt (4) into the applicable hole.
(6) Install the washer (5) and the nut (6) on the Hi-Lok bolt (4).
(7) TORQUE the nut (6) to between 44 and 36 lbf.in (0.50 and 0.41 m.daN )
. POST SBN 71-0181
(8) Put the gearbox breather outlet duct (7) and the bracket (8) in the correct position for installation. Install rivets (2) CR3532-5-2.
(9) Install the Hi-Lok bolt (4) into the applicable hole.
(10) Install the washer (5) and the nut (6) to the Hi-Lok bolt (4).
(11) TORQUE the nuts (6) to between 44 and 36 lbf.in (0.50 and 0.41 m.daN )
. (12) Apply the sealant (Material No.V08-024) as follows:
(a) Put the sealing compound through the drain hole in the fan cowl door (3) until you can see it around the edges and through the hole in the bracket (8).
(b) Fill the drain hole with sealing compound and make it smooth with the outer surface of the right fan cowl door (3).
(c) Apply a layer of sealants around the edges of the bracket (8).
(d) Let the sealant cure, refer to manufacturer's instructions.
END SBN 71-0181
(13) Remove any unwanted sealant from the right fan cowl door (3).
(14) Install the gearbox breather vent (Ref. AMM TASK 71-13-16-400-011).
B. Do a pressure test of the gearbox breather outlet duct
(1) Make a plug equal to the diameter of the outlet duct from 0.25 in. (6 mm) thick (approximately) silicone rubber sheet.
(2) Put the plug on the end of the gearbox breather outlet duct and attach with hand pressure to provide an effective seal.
(3) Put soapy water around the sealed edge of the gearbox breather outlet duct.
(4) Put air pressure through the gearbox breather vent to give pressure in the gearbox breather outlet duct. Examine for leaks around the sealed edge of the gearbox breather outlet duct.
(5) If air leaks are found, remove the gearbox breather outlet duct and apply sealant again.
(6) Repeat pressure test of the gearbox breather outlet duct until no leaks are found.
5. Close-up(1) Make a plug equal to the diameter of the outlet duct from 0.25 in. (6 mm) thick (approximately) silicone rubber sheet.
(2) Put the plug on the end of the gearbox breather outlet duct and attach with hand pressure to provide an effective seal.
(3) Put soapy water around the sealed edge of the gearbox breather outlet duct.
(4) Put air pressure through the gearbox breather vent to give pressure in the gearbox breather outlet duct. Examine for leaks around the sealed edge of the gearbox breather outlet duct.
(5) If air leaks are found, remove the gearbox breather outlet duct and apply sealant again.
(6) Repeat pressure test of the gearbox breather outlet duct until no leaks are found.
Subtask 71-13-16-410-055-A ** ON A/C NOT FOR ALL