Removal of the Transfer Gearbox Module [CFMI]

TASK 72-62-00-000-001-A
Removal of the Transfer Gearbox Module

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

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	CONTAINER - STORAGE
No specific	1	CONTAINER 15 L - SHALLOW
No specific	AR	HAMMER SNAP-ON CG240-9 - SLIDE, PULLER
No specific	AR	PLIERS - NOSE, SOFT, LONG
No specific	AR	PLUG - BLANKING
No specific	AR	WARNING NOTICE(S)
856A2537	1	PROTECTOR-MOUNTING PIN
856A2719	1	FIXTURE,SUPPORT-TGB R/I
856A2727	1	PULLER RADIAL DRIVE SHAFT
856A2805	1	TURNBUCKLE-TGB R/I

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
90	BLANKING KIT	AIPC 79-00-00-20-330

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 72-63-00-000-001-A	Removal of the Accessory Gearbox Module
TASK 72-63-00-000-004-A	Removal of the Handcranking Drive Cover
TASK 72-63-00-400-004-A	Installation of the Handcranking Drive Cover
TASK 72-63-00-860-002-A	Disengagement/Engagement of the Horizontal Drive Shaft
TASK 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
TASK 80-11-10-000-001-A	Removal of the Pneumatic Starter
Scavenge Plug Removal
Disconnection of Tubes on LH Side of TGB
Disconnection of Brackets on RH and Lower Side of TGB
AGB/TGB Turnbuckle Installation
Removal of the TGB
Removal of Mounting Pin
Extraction of Mounting Pin
Extraction of Radial Drive Shaft
Protective Cover and Plug Installation

3. Job Set-up
Subtask 72-62-00-941-051-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 72-62-00-010-051-A ** ON A/C NOT FOR ALL

B. Open the fan cowl doors: (Ref. AMM TASK 71-13-00-010-040)
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 72-62-00-040-051-A ** ON A/C NOT FOR ALL

C. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 72-62-00-010-053-A ** ON A/C NOT FOR ALL

D. Open the thrust reverser cowl doors: (Ref. AMM TASK 78-36-00-010-040)
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR

4. Procedure
Subtask 72-62-00-020-051-A ** ON A/C NOT FOR ALL

A. Remove TGB external parts as follows:
(1) Intall a CONTAINER 15 L - SHALLOW under the TGB to catch residual fluid draining from tubes and control.
(2) Remove oil drain plug (20) from the front face of the TGB and collect the oil from the TGB housing. Reinstall the plug, and tighten by hand.

Scavenge Plug Removal ** ON A/C NOT FOR ALL

(3) Remove the 4 bolts (110) which attach the TGB scavenge tube (170) to the TGB housing (120) left-hand side.

Disconnection of Tubes on LH Side of TGB ** ON A/C NOT FOR ALL

(4) Remove and retain gasket (90) located between TGB housing (120) and TGB scavenge tube flange.
(5) Remove the 4 bolts (230) which attach the oil tank vent tube (220) assembly to the TGB housing (130).
(6) Remove and keep gasket (240) located between the oil tank vent tube (220) flange and the TGB housing (120).
(7) Loosen the union nut:

CAUTION: USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:

ONE WRENCH TO HOLD THE UNION, AND
ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.

THIS PREVENTS DAMAGE TO THE PARTS.

(a) Loosen the union nut (100) which attaches the TGB oil supply tube (180) to the TGB housing (120).

PRE SB 72-169

(8) Remove the two bolts (290) which attach the right-hand rear bracket (270) to the right side of the TGB housing (120).

Disconnection of Brackets on RH and Lower Side of TGB ** ON A/C NOT FOR ALL

POST SB 72-169

(9) Remove the two bolts (290) which attach the right-hand rear bracket (270) and the bleed bias bracket (280) to the right side of the TGB housing (120).

Disconnection of Brackets on RH and Lower Side of TGB ** ON A/C NOT FOR ALL

(10) Remove the two bolts (360) which attach the bracket (60) to the rear face of the TGB housing (120).

Disconnection of Brackets on RH and Lower Side of TGB ** ON A/C NOT FOR ALL

(11) Remove the two bolts (50 and 40) which attach the upper left-hand bracket (30) to the left-hand and rear side of TGB housing (120).

Disconnection of Tubes on LH Side of TGB ** ON A/C NOT FOR ALL

(12) Remove the bolt (70) which attaches the lower left-hand bracket (80) on the left side of the TGB housing (120).

Disconnection of Tubes on LH Side of TGB ** ON A/C NOT FOR ALL

(13) Remove the bolt (300) which attaches the forward bracket (260) to the right side of the TGB housing (120).

Disconnection of Brackets on RH and Lower Side of TGB ** ON A/C NOT FOR ALL

END OF SB 72-169

Subtask 72-62-00-480-051-A ** ON A/C NOT FOR ALL

B. Installation of support equipments:
(1) Install the 856A2805 TURNBUCKLE-TGB R/I as follows:

AGB/TGB Turnbuckle Installation ** ON A/C NOT FOR ALL

NOTE: To prevent the AGB rotation during the TGB removal it is necessary to install the TGB turnbuckle.

(a) Remove the pneumatic starter (Ref. AMM TASK 80-11-10-000-001).
(b) Remove bolt and nut from hole No. 47 on flange G.

AGB/TGB Turnbuckle Installation ** ON A/C NOT FOR ALL

(c) Install the TGB turnbuckle yoke on the flange G of the fan inlet case and attach it with the 2 lockpins supplied.
(d) Adjust the height of the tool, using coupling screw, to obtain the exact position of the baseplate on the AGB rear flange.
(e) Attach the TGB turnbuckle to the AGB housing with the screws and washers.
(f) Tighten the coupling screw by hand to lock the AGB in relation to the fan frame.
(2) Install the 856A2719 FIXTURE,SUPPORT-TGB R/I as follows:

Disconnection of Brackets on RH and Lower Side of TGB ** ON A/C NOT FOR ALL

Removal of the TGB ** ON A/C NOT FOR ALL

(a) Install the TGB removal/installation support on a hydraulic hoist platform.
(b) Install the hydraulic hoist platform under the TGB module.
(c) Remove the 2 bolts (350), the nuts (330) and the washers (340) which attach the TGB housing to the horizontal drive shaft housing at the 4:30 and 7:30 o'clock positions.

Disconnection of Brackets on RH and Lower Side of TGB ** ON A/C NOT FOR ALL

(d) Operate the hoist platform and adjust the rear yoke of the TGB support with the TGB rear mount until you can install the lockpin.

Removal of the TGB ** ON A/C NOT FOR ALL

(e) Adjust the 2 front plates of the tool, and engage the 2 lockpins in the 4:30 and 7:30 o'clock position holes of the TGB forward flange.

Removal of the TGB ** ON A/C NOT FOR ALL

(f) Remove bolts:

CAUTION: DO NOT REMOVE THE 3 BOLTS, NUTS AND WASHERS INSTALLED IN THE HOLES FITTED WITH FLANGED BUSHINGS.

1 Remove the 7 bolts (190), nuts (210) and washers (200) which attach the TGB housing with the LH support bracket to the horizontal drive shaft housing.

Disconnection of Tubes on LH Side of TGB ** ON A/C NOT FOR ALL

Subtask 72-62-00-020-050-A ** ON A/C NOT FOR ALL

C. Removal of the TGB
(1) Remove the handcranking cover (Ref. AMM TASK 72-63-00-000-004).
(2) Remove the handcranking drive and disengage the horizontal drive shaft (Ref. AMM TASK 72-63-00-860-002).
(3) Remove the 3 remaining bolts (160), nuts (130) and washers (140) which attach the AGB with the forward brackets (150) and (250) to the TGB.
(4) Removal of the TGB from the fan frame.
(a) Remove the cotter pin (370), nut (380) and washer (390) from the TGB mounting pin (400).

Removal of Mounting Pin ** ON A/C NOT FOR ALL

(b) Install the 856A2537 PROTECTOR-MOUNTING PIN on the external threads of the mounting pin (400).

Extraction of Mounting Pin ** ON A/C NOT FOR ALL

(c) Install the impact puller into the tapped head of the mounting pin (400).
(d) Remove the mounting pin (400). Remove the impact puller from the mounting pin.
(e) Use a hydraulic hoist platform to slowly lower the TGB and fixture assembly, and separate the TGB from the fan frame.
(f) Keep the gasket (410) located between the AGB and the TGB.
(g) Remove and discard the O-ring (420) on the horizontal drive shaft.
(h) Remove the O-ring (430) on the oil distributor in the bevel gear.

NOTE: Make sure that O-ring (430) is serviceable and O-ring outer diameter is correct. If it is not serviceable, remove and discard it with PLIERS - NOSE, SOFT, LONG

(i) Remove and discard the seal ring.

Disconnection of Brackets on RH and Lower Side of TGB ** ON A/C NOT FOR ALL

(j) Two different conditions can occur after the removal of the TGB:
1 If the radial drive shaft (440) comes with the TGB, remove the shaft from TGB and perform step (k).
2 If the radial drive shaft (440) remains in the fan frame do as follows:

Extraction of Radial Drive Shaft ** ON A/C NOT FOR ALL

a Screw the 856A2727 PULLER RADIAL DRIVE SHAFT into the radial drive shaft.
b Screw the HAMMER SNAP-ON CG240-9 - SLIDE, PULLER into the puller.
c Remove the radial drive shaft from the fan frame.
(k) Remove and discard the O-ring (450) located in the groove at the lower side of the shaft.

Extraction of Radial Drive Shaft ** ON A/C NOT FOR ALL

(l) Store the radial drive shaft into its storage tube assembly.

Protective Cover and Plug Installation ** ON A/C NOT FOR ALL

Subtask 72-62-00-420-052-A ** ON A/C NOT FOR ALL

D. Installation of AIPC 79-00-00-20-330 BLANKING KIT (90) on TGB housing ports and tubes.

Protective Cover and Plug Installation ** ON A/C NOT FOR ALL

(1) Install the cover (510) on the forward face of the TGB housing.
(2) Install the cover (470) on the upper face of the TGB housing.
(3) Install the plug (500) on the vent tube of the TGB housing.
(4) Install the plug (490) on the scavenge tube port of the TGB housing.
(5) Install the cap (480) on the nipple of the TGB oil supply tube.
(6) Install a cover on the aft end of the AGB horizontal drive shaft housing (Ref. AMM TASK 72-63-00-000-001).
(7) Install PLUG - BLANKING on the open tube ends.
(8) Install protective items of assembly (460) on radial drive shaft. Install shaft in the protective tube and install covers.

Subtask 72-62-00-410-054-A ** ON A/C NOT FOR ALL

E. Installation of the handcranking assembly:

NOTE: You can omit this step if the TGB is immediately replaced.

(1) Engage the horizontal drive shaft (Ref. AMM TASK 72-63-00-860-002).
(2) Install the handcranking drive cover (Ref. AMM TASK 72-63-00-400-004).

NOTE: Do not replace O-rings. New O-rings will be installed after re-installation of TGB.

Subtask 72-62-00-080-050-A ** ON A/C NOT FOR ALL

F. Removal of the TGB from the support tool.
(1) Hold the TGB and remove the rear lockpin of 856A2719 FIXTURE,SUPPORT-TGB R/I.

Removal of the TGB ** ON A/C NOT FOR ALL

(2) Disengage the TGB from the support and place the TGB in a CONTAINER - STORAGE.

[Rev.10 from 2021] 2026.04.01 13:14:00 UTC