Installation of the Gearbox Breather Outlet Duct (GBOD) [IAE]

TASK 72-61-49-400-010-B
Installation of the Gearbox Breather Outlet Duct (GBOD)

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 110 and 90 lbf.in (1.24 and 1.02 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-002)	cleaning fluid
(Material No.V10-073)	synthetic grease
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
4	PACKING	AIPC 72-61-49-80-030

E. Referenced Information

REFERENCE	DESIGNATION
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 70-23-13-911-010-A	Procedures for the Installation of Preformed Packings
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 72-61-49-000-010-B	Removal of the Gearbox Breather Outlet Duct (GBOD)
Gearbox Breather Outlet Duct

3. Job Set-up
Subtask 72-61-49-860-051-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).
(3) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.

Subtask 72-61-49-110-051-A ** ON A/C NOT FOR ALL

B. Clean the GBOD and the mounting pad
(1) Remove the cap from the mounting pad (1) on the gearbox casing

Gearbox Breather Outlet Duct ** ON A/C NOT FOR ALL

(2) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) , made moist with cleaning fluid (Material No.V01-002) to clean:
(a) The Gearbox Breather Outlet Duct (GBOD) (3).
(b) The mounting pad (1) on the gearbox casing.
(3) Make the above components dry with a clean Textile-Lint free Cotton - (Material No.14SBA1) .

4. Procedure
Subtask 72-61-49-420-051-A ** ON A/C NOT FOR ALL

A. Install the GBOD
(1) Install a new AIPC 72-61-49-80-030 PACKING (4) on to the GBOD (3) (Ref. AMM TASK 70-23-13-911-010).

Gearbox Breather Outlet Duct ** ON A/C NOT FOR ALL

(2) Put the GBOD (3) in the correct position for installation on the mounting pad (1) (Ref. AMM TASK 72-61-49-000-010).
(3) Put synthetic grease (Material No.V10-073) on the shanks of the three bolts (2).
(4) Attach the GBOD to the mounting pad with the three bolts (2).
(5) Close the right fan cowl and align the GBOD with the gearbox breather outlet vent on the fan cowl.
(6) TORQUE the bolts (2) to between 110 and 90 lbf.in (1.24 and 1.02 m.daN )

(Ref. AMM TASK 70-23-11-911-013).

5. Close-up
Subtask 72-61-49-410-051-A ** ON A/C NOT FOR ALL

A. Close access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 12:56:09 UTC