DOC AIRBUS | AMM A320FRemoval of the Transfer Gearbox Module [CFMB]
TASK 72-62-00-000-002-A
Removal of the Transfer Gearbox Module
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 72-62-00-941-053-A ** ON A/C NOT FOR ALL
Subtask 72-62-00-020-053-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:43:39 UTC
Removal of the Transfer Gearbox Module
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 | CAP - BLANKING |
| 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 |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-040-B | Opening of the Fan Cowl Doors |
| TASK 72-63-00-400-002-A | Installation of the Handcranking Drive Cover |
| TASK 72-63-00-860-001-A | Disengagement/Engagement of the Horizontal Drive Shaft |
| TASK 78-30-00-481-041-B | Make the Thrust Reverser Unserviceable for Maintenance |
| TASK 78-36-00-010-040-B | Opening of the Thrust Reverser Doors |
| TASK 80-11-10-000-002-A | Removal of the Pneumatic Starter |
Drain Plug RemovalSubtask 72-62-00-941-053-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 72-62-00-010-056-A ** ON A/C NOT FOR ALL (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).
B. Get Access
(1) Open the fan cowl doors: (Ref. AMM TASK 71-13-00-010-040)
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 72-62-00-040-054-A ** ON A/C NOT FOR ALL Subtask 72-62-00-010-058-A ** ON A/C NOT FOR ALL (1) Open the fan cowl doors: (Ref. AMM TASK 71-13-00-010-040)
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR
D. Open the thrust reverser 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(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 72-62-00-020-053-A ** ON A/C NOT FOR ALL
A. Remove TGB external parts as follows:
(1) Install a CONTAINER 15 L - SHALLOW under the TGB to catch residual fluid draining from tubes and control.
(2) Drain the TGB as follows:
(a) Cut and remove the lockwire which safeties the drain plug (20) to the TGB.
(b) Remove the drain plug (20) and let the oil drain.
(c) Install the drain plug (20). Tighten by hand.
(3) Loosen and remove the 4 bolts (110) securing the TGB scavenge tube (170) to the TGB housing (120) LH side.
(4) Remove and retain gasket (90) located between TGB housing (120) and TGB scavenge tube flange.
(5) Loosen and remove the 4 bolts (230) which secure the oil tank vent tube (220) assembly to the TGB housing (120).
(6) Remove and retain gasket (240) located between the oil tank vent tube (220) flange and the TGB housing (120).
(7) Loosen union nut.
(8) Remove the two bolts (290) securing RH rear bracket (270) and the bleed bias bracket (280) to the right side of the TGB housing (120).
(9) Remove the two bolts (360) securing bracket (60) on the rear face of the TGB housing (120).
(10) Remove the two bolts (40 and 50) securing upper LH bracket (30) to the LH and rear side of TGB housing .
(11) Remove the bolt (70) securing lower LH bracket (80) on the left side of the TGB housing (120).
(12) Remove the bolt (300) securing forward bracket (260) on the right side of the TGB housing (120).
Subtask 72-62-00-480-052-A ** ON A/C NOT FOR ALL (1) Install a CONTAINER 15 L - SHALLOW under the TGB to catch residual fluid draining from tubes and control.
(2) Drain the TGB as follows:
(a) Cut and remove the lockwire which safeties the drain plug (20) to the TGB.
(b) Remove the drain plug (20) and let the oil drain.
(c) Install the drain plug (20). Tighten by hand.
(3) Loosen and remove the 4 bolts (110) securing the TGB scavenge tube (170) to the TGB housing (120) LH side.
(4) Remove and retain gasket (90) located between TGB housing (120) and TGB scavenge tube flange.
(5) Loosen and remove the 4 bolts (230) which secure the oil tank vent tube (220) assembly to the TGB housing (120).
(6) Remove and retain gasket (240) located between the oil tank vent tube (220) flange and the TGB housing (120).
(7) Loosen union nut.
CAUTION:
USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:
(a) Loosen union nut (100) which attaches the securing TGB oil supply tube (180) to TGB housing (120). - ONE WRENCH TO HOLD THE UNION, AND
- ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.
(8) Remove the two bolts (290) securing RH rear bracket (270) and the bleed bias bracket (280) to the right side of the TGB housing (120).
(9) Remove the two bolts (360) securing bracket (60) on the rear face of the TGB housing (120).
(10) Remove the two bolts (40 and 50) securing upper LH bracket (30) to the LH and rear side of TGB housing .
(11) Remove the bolt (70) securing lower LH bracket (80) on the left side of the TGB housing (120).
(12) Remove the bolt (300) securing forward bracket (260) on the right side of the TGB housing (120).
B. Installation of support equipment.
(1) Install 856A2805 TURNBUCKLE-TGB R/I as follows:
(b) Remove bolts and nuts from holes No. 46 and 47 on flange F to free brackets at this place.
(c) Install the TGB turnbuckle yoke on the flange F of the fan inlet case. Attach the yoke at holes No. 47 and 48, with the 2 lockpins supplied.
(d) Adjust the height of tool, using the 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 screws and washers supplied.
(f) Handtighten the coupling screw in order to lock the AGB relative to the fan frame.
(2) Install 856A2719 FIXTURE,SUPPORT-TGB R/I as follows:
(a) Install TGB removal/installation support on a hydraulic hoist platform.
(b) Position hydraulic hoist platform under TGB module.
(c) Disengage the horizontal drive shaft (Ref. AMM TASK 72-63-00-860-001).
(d) Remove the 2 bolts (350), nuts (330) and washers (340) securing TGB housing to the horizontal drive shaft housing at the 4:30 and 7:30 o'clock positions.
(e) Actuate hydraulic hoist platform and adjust rear yoke of TGB support with TGB rear mount until the lockpin can be inserted.
(f) Adjust the 2 front plates of tool and engage the 2 lockpins in the 4:30 and 7:30 o'clock position holes of the TGB forward flange.
(g) Remove the bolts.
Subtask 72-62-00-020-052-A ** ON A/C NOT FOR ALL (1) Install 856A2805 TURNBUCKLE-TGB R/I as follows:
NOTE: To prevent AGB rotation during the TGB removal, it is necessary to install the TGB turnbuckle.
(a) Remove the pneumatic starter (Ref. AMM TASK 80-11-10-000-002). (b) Remove bolts and nuts from holes No. 46 and 47 on flange F to free brackets at this place.
(c) Install the TGB turnbuckle yoke on the flange F of the fan inlet case. Attach the yoke at holes No. 47 and 48, with the 2 lockpins supplied.
(d) Adjust the height of tool, using the 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 screws and washers supplied.
(f) Handtighten the coupling screw in order to lock the AGB relative to the fan frame.
(2) Install 856A2719 FIXTURE,SUPPORT-TGB R/I as follows:
(a) Install TGB removal/installation support on a hydraulic hoist platform.
(b) Position hydraulic hoist platform under TGB module.
(c) Disengage the horizontal drive shaft (Ref. AMM TASK 72-63-00-860-001).
(d) Remove the 2 bolts (350), nuts (330) and washers (340) securing TGB housing to the horizontal drive shaft housing at the 4:30 and 7:30 o'clock positions.
(e) Actuate hydraulic hoist platform and adjust rear yoke of TGB support with TGB rear mount until the lockpin can be inserted.
(f) Adjust the 2 front plates of tool and engage the 2 lockpins in the 4:30 and 7:30 o'clock position holes of the TGB forward flange.
(g) Remove the 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 4 washers (200) securing TGB housing and the LH support bracket to the horizontal drive shaft housing. C. Removal of the TGB from the Fan Frame.
(1) Install 856A2537 PROTECTOR-MOUNTING PIN on the external threads of the mounting pin (400).
(2) Install impact puller into the tapped head of mounting pin (400).
(3) Remove mounting pin (400). Remove the impact puller from the mounting pin.
(4) Separate TGB from fan frame by slowly lowering TGB and fixture assembly using a hydraulic hoist platform.
(5) Keep gasket (410) located between AGB and TGB.
(6) Remove and discard the O-ring (420) on the horizontal drive shaft.
(7) Remove the O-ring (430) on the oil distributor in the bevel gear.
(9) Two different cases may appear after lowering the TGB:
(a) If the radial drive shaft (440) comes with the TGB, remove the shaft from TGB and perform step (10).
(b) If the radial drive shaft (440) remains into the fan frame, proceed as follows:
1 Install 856A2727 PULLER RADIAL DRIVE SHAFT to the radial drive shaft.
2 Attach HAMMER SNAP-ON CG240-9 - SLIDE, PULLER to the puller.
3 Extract radial drive shaft from fan frame.
(10) Remove and discard the O-ring (450) located in groove at lower side of shaft.
(11) Store the radial drive shaft into its storage tube assembly.
Subtask 72-62-00-420-056-A ** ON A/C NOT FOR ALL (1) Install 856A2537 PROTECTOR-MOUNTING PIN on the external threads of the mounting pin (400).
(2) Install impact puller into the tapped head of mounting pin (400).
(3) Remove mounting pin (400). Remove the impact puller from the mounting pin.
(4) Separate TGB from fan frame by slowly lowering TGB and fixture assembly using a hydraulic hoist platform.
(5) Keep gasket (410) located between AGB and TGB.
(6) Remove and discard the O-ring (420) on the horizontal drive shaft.
(7) 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.
(8) Remove and discard the seal ring (295). (9) Two different cases may appear after lowering the TGB:
(a) If the radial drive shaft (440) comes with the TGB, remove the shaft from TGB and perform step (10).
(b) If the radial drive shaft (440) remains into the fan frame, proceed as follows:
1 Install 856A2727 PULLER RADIAL DRIVE SHAFT to the radial drive shaft.
2 Attach HAMMER SNAP-ON CG240-9 - SLIDE, PULLER to the puller.
3 Extract radial drive shaft from fan frame.
(10) Remove and discard the O-ring (450) located in groove at lower side of shaft.
(11) Store the radial drive shaft into its storage tube assembly.
D. Installation of CAP - BLANKING and handcranking assembly.
(1) Installation of CAP - BLANKING on the TGB.
(a) Install cover (510) onto forward face of TGB housing.
(b) Install cover (470) onto upper face of TGB housing.
(c) Install plug (500) onto port of TGB vent tube of TGB housing.
(d) Install plug (490) onto scavenge tube port of TGB housing.
(e) Install cap (480) onto TGB oil supply tube nipple.
(f) Install cover onto AGB horizontal drive shaft housing aft end.
(g) Install PLUG - BLANKING on open ports of all tubes.
(2) Installation of the Handcranking assembly:
(b) Install the handcranking drive cover (Ref. AMM TASK 72-63-00-400-002).
Subtask 72-62-00-080-052-A ** ON A/C NOT FOR ALL (1) Installation of CAP - BLANKING on the TGB.
(a) Install cover (510) onto forward face of TGB housing.
(b) Install cover (470) onto upper face of TGB housing.
(c) Install plug (500) onto port of TGB vent tube of TGB housing.
(d) Install plug (490) onto scavenge tube port of TGB housing.
(e) Install cap (480) onto TGB oil supply tube nipple.
(f) Install cover onto AGB horizontal drive shaft housing aft end.
(g) Install PLUG - BLANKING on open ports of all tubes.
(2) Installation of the Handcranking assembly:
NOTE: You can ignore this step if the TGB is immediately replaced.
(a) Engage the horizontal drive shaft (Ref. AMM TASK 72-63-00-860-001). (b) Install the handcranking drive cover (Ref. AMM TASK 72-63-00-400-002).
NOTE: Do not replace the O-rings of the handcranking drive cover. New O-rings will be installed after reinstallation of the TGB.
E. Removal of the TGB from the Tool.
(1) Hold the TGB and remove the rear lockpin of the 856A2719 FIXTURE,SUPPORT-TGB R/I.
(2) Disengage the TGB from the support and place in a storage container.
(1) Hold the TGB and remove the rear lockpin of the 856A2719 FIXTURE,SUPPORT-TGB R/I.
(2) Disengage the TGB from the support and place in a storage container.