DOC AIRBUS | AMM A320FRemoval of the Accessory Gearbox Assembly [CFMB]
TASK 72-63-00-000-003-A
Removal of the Accessory Gearbox Assembly
1. Reason for the Job
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 72-63-00-941-061-A ** ON A/C NOT FOR ALL
Subtask 72-63-00-941-062-A ** ON A/C NOT FOR ALL
(a) Remove the nut (400) and the bolt (465) from the bracket (475) on the AGB left-hand side.
(b) Remove the outer spring clip (425), the inner spring clip (440) and the plastic bushing (435) from the CLP fuel tube (430).
(c) Remove the outer spring clip (405), the inner spring clip (420) and the plastic bushing (410) from the oil heater tube (415).
(d) Remove the outer spring clip (460), the inner spring clip (450) and the plastic bushing (470) from the IDG exchanger fuel outlet tube (455).
(e) Remove the bolt (445) and the bracket (475) from the AGB left-hand side.
(f) Remove the nut (165) and the bolt (125) from the bracket (130).
(g) Remove the outer spring clip (135), the inner spring clip (145) and the plastic bushing (140) from the TGB oil scavenge tube (110).
(h) Remove the outer spring clip (160), the inner spring clip (150) and the plastic bushing (155) from the rear sump oil return tube (105).
(i) Remove the bolts (120), (170) and (175) which attach the forward sump oil return tube (100), the TGB oil scavenge tube (110) and the rear sump oil return tube (105) from the AGB front face.
(j) Remove and keep the gaskets (115), (180) and (185).
(k) Remove the nut (70) and the bolt (65) from the bracket (90) on the AGB front face.
(l) Remove the outer spring clip (75), the inner spring clip (85) and the plastic bushing (80) from the rear sump oil supply tube (60).
(m) Remove the nut (15) and the bolt (40) from the bracket (45) on the AGB front face.
(n) Remove the outer spring clip (35), the inner spring clip (20) and the plastic bushing (25) from the AGB/TGB oil supply tube (30).
(o) Remove the nut (95) and the bolt (55) from the bracket (90) on the AGB front face.
(p) Remove the outer spring clip (50), the inner spring clip (5) and the plastic bushing (10) from the AGB/TGB oil supply tube (30).
(q) Remove the nut (215) and the bolt (190).
(r) Remove the outer spring clip (210), the inner spring clip (200), the plastic bushing (205) and the bracket (195) from the forward fan case water drain tube (220).
(s) Remove the forward fan case water drain tube (220) from the engine.
(t) Remove the nut (560) and the bolt (540).
(u) Remove the outer spring clip (555), the inner spring clip (545), the plastic bushing (550) and the bracket (535) from the aft fan case water drain tube (530).
(v) Remove the aft fan case water drain tube (530) from the engine.
(2) Disconnect the water drain tubes (220) and (530) from the fan case nipples and remove them from the engine.
Subtask 72-63-00-020-065-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 12:59:31 UTC
Removal of the Accessory Gearbox Assembly
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 1M(3 FT) |
| No specific | AR | CAP - BLANKING |
| No specific | 1 | CONTAINER 15 L - SHALLOW |
| No specific | AR | HAMMER - SLIDE |
| No specific | AR | PIPETTE |
| No specific | AR | PLIERS - NOSE, SOFT, LONG |
| No specific | AR | WARNING NOTICE(S) |
| 856A2537 | 1 | PROTECTOR-MOUNTING PIN |
| 856A2719 | 1 | FIXTURE,SUPPORT-TGB R/I |
| 856A2727 | 1 | PULLER RADIAL DRIVE SHAFT |
| 856A2754G02 | 1 | FIXTURE, SUPPORT-AGB |
| 856A3519 | 1 | SLING LIFT AGB |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP2442) | engine oil |
| (Material No.CP5075) | corrosion protective additive |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-13-79-610-004-C | Draining of the Accessory Drive Section |
| TASK 24-21-51-000-040-B | Removal of the Integrated Drive Generator - IDG 1(2) |
| TASK 26-12-15-000-042-A | Removal of the Fan Fire Detectors |
| TASK 29-11-51-000-041-A | Removal of the Green Engine Pump |
| TASK 71-13-00-010-040-B | Opening of the Fan Cowl Doors |
| TASK 71-71-43-000-041-A | Removal of the Drain Manifold Module |
| TASK 71-73-49-000-003-B | Removal of the Starter Pad Oil Drain Tube |
| TASK 71-73-49-000-004-B | Removal of the IDG Oil Drain Tube |
| TASK 71-73-49-000-007-A | Removal of the Fan Case Drain Tubes |
| TASK 71-73-49-000-008-A | Removal of the Fuel Pump Drain Tubes |
| TASK 71-73-49-000-026-A | Removal of the Heat Exchanger Drain Tube |
| TASK 71-73-49-000-027-A | Removal of the Hydro Mechanical Unit (HMU) Drain Tube |
| TASK 71-73-49-000-028-A | Removal of the Hydraulic Pump Drain Tube |
| TASK 71-73-49-000-029-A | Removal of the Forward Oil Sump Drain Tube |
| TASK 71-73-49-000-049-B | Removal of the Reservoir to Manifold Hydraulic Oil Drain Tube |
| TASK 72-63-00-860-001-A | Disengagement/Engagement of the Horizontal Drive Shaft |
| TASK 73-11-10-000-003-A | Removal of the Fuel Pump and Filter Assembly |
| TASK 73-21-30-000-001-A | Removal of the Control Alternator |
| TASK 77-11-20-000-002-A | Removal of the N2 Speed Sensor . |
| 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 79-21-10-000-004-A | Removal of the Lubrication Unit |
| TASK 80-11-10-000-002-A | Removal of the Pneumatic Starter |
Accessory Gearbox AssemblySubtask 72-63-00-941-061-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 72-63-00-010-071-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):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 1M(3 FT) in position.
Subtask 72-63-00-040-053-A ** ON A/C NOT FOR ALL Subtask 72-63-00-010-074-A ** ON A/C NOT FOR ALL (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 1M(3 FT) in position.
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 72-63-00-941-062-A ** ON A/C NOT FOR ALL
A. Put a CONTAINER 15 L - SHALLOW under the Accessory Gearbox (AGB) to collect the remaining fluid from the tubes and control.
Subtask 72-63-00-010-070-A ** ON A/C NOT FOR ALL B. Preparation for the Removal of the AGB
(2) Remove the drain manifold module (Ref. AMM TASK 71-71-43-000-041).
(3) Remove the drain tubes under the AGB/TGB as follows:
(a) FRV drain tubes (Ref. AMM TASK 71-73-49-000-007).
(b) Oil reservoir drain tube (Ref. AMM TASK 71-73-49-000-049).
(c) HMU drain tube (Ref. AMM TASK 71-73-49-000-027).
(d) Heat exchanger drain tube (Ref. AMM TASK 71-73-49-000-026).
(e) Fuel pump drain tube (Ref. AMM TASK 71-73-49-000-008).
(f) Hydraulic pump drain tube (Ref. AMM TASK 71-73-49-000-028).
(g) IDG pad drain tube (Ref. AMM TASK 71-73-49-000-004).
(h) Starter pad drain tube (Ref. AMM TASK 71-73-49-000-003).
(i) Forward sump drain tube (Ref. AMM TASK 71-73-49-000-029).
(4) Remove the hydraulic pump (Ref. AMM TASK 29-11-51-000-041).
(5) Remove the Integrated Drive Generator (IDG) (Ref. AMM TASK 24-21-51-000-040).
(6) Remove the N2 speed sensor (Ref. AMM TASK 77-11-20-000-002).
(7) Remove the pneumatic starter (Ref. AMM TASK 80-11-10-000-002).
(8) Remove the lubrication unit (Ref. AMM TASK 79-21-10-000-004).
(9) Remove the fuel pump (Ref. AMM TASK 73-11-10-000-003).
(10) Remove the ECU alternator (Ref. AMM TASK 73-21-30-000-001).
(11) Drain the accessory drive section (Ref. AMM TASK 12-13-79-610-004).
(12) Install a CAP - BLANKING on the free ends of tubes and on the connectors to prevent contamination.
Subtask 72-63-00-020-069-A ** ON A/C NOT FOR ALL CAUTION:
USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:
(1) Remove the fan fire detector (Ref. AMM TASK 26-12-15-000-042). - ONE WRENCH TO HOLD THE UNION, AND
- ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.
(2) Remove the drain manifold module (Ref. AMM TASK 71-71-43-000-041).
(3) Remove the drain tubes under the AGB/TGB as follows:
(a) FRV drain tubes (Ref. AMM TASK 71-73-49-000-007).
(b) Oil reservoir drain tube (Ref. AMM TASK 71-73-49-000-049).
(c) HMU drain tube (Ref. AMM TASK 71-73-49-000-027).
(d) Heat exchanger drain tube (Ref. AMM TASK 71-73-49-000-026).
(e) Fuel pump drain tube (Ref. AMM TASK 71-73-49-000-008).
(f) Hydraulic pump drain tube (Ref. AMM TASK 71-73-49-000-028).
(g) IDG pad drain tube (Ref. AMM TASK 71-73-49-000-004).
(h) Starter pad drain tube (Ref. AMM TASK 71-73-49-000-003).
(i) Forward sump drain tube (Ref. AMM TASK 71-73-49-000-029).
(4) Remove the hydraulic pump (Ref. AMM TASK 29-11-51-000-041).
(5) Remove the Integrated Drive Generator (IDG) (Ref. AMM TASK 24-21-51-000-040).
(6) Remove the N2 speed sensor (Ref. AMM TASK 77-11-20-000-002).
(7) Remove the pneumatic starter (Ref. AMM TASK 80-11-10-000-002).
(8) Remove the lubrication unit (Ref. AMM TASK 79-21-10-000-004).
(9) Remove the fuel pump (Ref. AMM TASK 73-11-10-000-003).
(10) Remove the ECU alternator (Ref. AMM TASK 73-21-30-000-001).
(11) Drain the accessory drive section (Ref. AMM TASK 12-13-79-610-004).
(12) Install a CAP - BLANKING on the free ends of tubes and on the connectors to prevent contamination.
CAUTION:
MAKE SURE THAT THE TUBE NUTS ARE NOT MISSING DURING THE REMOVAL OF FAN CASE WATER DRAIN TUBES.
C. Removal of the Fan Case Water Drain Tubes NOTE: The AGB scavenge tube has been removed to ease the removal of the ECU alternator.
(1) Remove the parts which attach the fan case water drain tubes (220) and (530) as follows: (a) Remove the nut (400) and the bolt (465) from the bracket (475) on the AGB left-hand side.
(b) Remove the outer spring clip (425), the inner spring clip (440) and the plastic bushing (435) from the CLP fuel tube (430).
(c) Remove the outer spring clip (405), the inner spring clip (420) and the plastic bushing (410) from the oil heater tube (415).
(d) Remove the outer spring clip (460), the inner spring clip (450) and the plastic bushing (470) from the IDG exchanger fuel outlet tube (455).
(e) Remove the bolt (445) and the bracket (475) from the AGB left-hand side.
(f) Remove the nut (165) and the bolt (125) from the bracket (130).
(g) Remove the outer spring clip (135), the inner spring clip (145) and the plastic bushing (140) from the TGB oil scavenge tube (110).
(h) Remove the outer spring clip (160), the inner spring clip (150) and the plastic bushing (155) from the rear sump oil return tube (105).
(i) Remove the bolts (120), (170) and (175) which attach the forward sump oil return tube (100), the TGB oil scavenge tube (110) and the rear sump oil return tube (105) from the AGB front face.
(j) Remove and keep the gaskets (115), (180) and (185).
(k) Remove the nut (70) and the bolt (65) from the bracket (90) on the AGB front face.
(l) Remove the outer spring clip (75), the inner spring clip (85) and the plastic bushing (80) from the rear sump oil supply tube (60).
(m) Remove the nut (15) and the bolt (40) from the bracket (45) on the AGB front face.
(n) Remove the outer spring clip (35), the inner spring clip (20) and the plastic bushing (25) from the AGB/TGB oil supply tube (30).
(o) Remove the nut (95) and the bolt (55) from the bracket (90) on the AGB front face.
(p) Remove the outer spring clip (50), the inner spring clip (5) and the plastic bushing (10) from the AGB/TGB oil supply tube (30).
(q) Remove the nut (215) and the bolt (190).
(r) Remove the outer spring clip (210), the inner spring clip (200), the plastic bushing (205) and the bracket (195) from the forward fan case water drain tube (220).
(s) Remove the forward fan case water drain tube (220) from the engine.
(t) Remove the nut (560) and the bolt (540).
(u) Remove the outer spring clip (555), the inner spring clip (545), the plastic bushing (550) and the bracket (535) from the aft fan case water drain tube (530).
(v) Remove the aft fan case water drain tube (530) from the engine.
(2) Disconnect the water drain tubes (220) and (530) from the fan case nipples and remove them from the engine.
D. Removal of the AGB External Parts
(1) Disengage the IDG electrical cables from the clamp on the AGB.
(2) Remove the parts which attach the AGB external parts as follows:
(a) Remove the bolts (360) and (365) to remove the FWD sump oil scavenge hose (355) from the AGB rear face.
(b) Remove and keep the gaskets (350) and (370).
(c) Remove the bolts (390) which attach the TGB oil scavenge hose (385) to the AGB rear face.
(d) Remove and keep the gasket (395).
(e) Remove the bolt (685) and the washer (690) to disconnect the bonding strip (695) from the AGB.
(3) Disconnect and remove the tubes (30) and (60) from the AGB.
(4) Disconnect the TGB oil supply tube (230) from the AGB.
(5) Removal of the Rear Sump Oil Tubes
(a) Cut and remove the lockwire.
(b) Disconnect the rear sump oil scavenge tube (270) and the rear sump oil supply tube (305) from the tube bundle.
(c) Remove the parts which attach the rear sump oil tubes as follows:
1 Remove the nut (335) and the bolt (225) from the bracket (345) on the AGB rear face.
2 Remove the outer spring clip (320), the inner spring clip (330) and the plastic bushing (325) from the rear sump oil supply tube (305).
3 Remove the nut (290) and the bolt (315) from the bracket (260) on the left-hand side of the TGB/horizontal drive shaft housing junction.
4 Remove the outer spring clip (310), the inner spring clip (295) and the plastic bushing (300) from the rear sump oil supply tube (305).
5 Remove the rear sump oil supply tube (305).
6 Remove the nut (235) and the bolt (285) from the bracket (260) on the left-hand side of the TGB/horizontal drive shaft housing junction.
7 Remove the outer spring clip (240), the inner spring clip (250) and the plastic bushing (245) from the TGB oil supply tube (230).
8 Remove the outer spring clip (275), the inner spring clip (265) and the plastic bushing (255) from the rear sump oil scavenge tube (270).
9 Remove the bolts (280) which attach the rear sump oil scavenge tube (270) to the AGB rear face.
10 Remove the rear sump oil scavenge tube (270) from the AGB rear face.
11 Remove and keep the gasket (340).
(6) Removal of the TGB External Parts
(a) Disconnect the TGB oil supply tubes (230) from the TGB left-hand side and remove the tubes (230).
(b) Remove the parts which attach the TGB external parts as follows:
1 Remove the bolt (610) which attaches the clamp (565) to the bracket (345) on the horizontal drive shaft housing, left-hand side.
2 Remove the clamp (565) which attaches the HJ8 harness to the bracket (345).
3 Remove the bolt (605) which attaches the clamp (600) to the bracket (535) on the AGB/TGB interface, left hand side.
4 Remove the clamp (600) which attaches the HJ8 harness to the bracket (535).
5 Remove the bolt (590) which attaches the clamp (595) to the bracket (345) on the horizontal drive shaft housing, left-hand side.
6 Remove the clamp (595) which attaches the HJ7 harness to the bracket (345).
7 Remove the bolt (585) which attaches the clamp (580) to the bracket (260) on the AGB/TGB interface, left-hand side.
8 Remove the clamp (580) which attaches the HJ7 harness to the bracket (260).
9 Remove the bolts (665) which attach the brackets (660) and (670) to the TGB right-hand side with electrical harness. Remove the brackets (660) and (670).
10 Remove the bolts (655) and the washers (650) which attach the bracket (645) to the TGB right hand side.
11 Remove the nuts (635) and the bolts (640) which attach the bracket (645) to the bracket (505) on the TGB right-hand side. The bracket (645) is attached to the electrical harnesses.
12 Remove the bolts (625) which attach the bracket (630) to the TGB left-hand side.
13 Remove the bolts (380) and the TGB oil scavenge hose (385) from the TGB left-hand side.
14 Remove and keep the gasket (375).
15 Remove the nuts (575), the bolts (570) and the brackets (260), (535) from the bracket (520) on the AGB/TGB interface, left-hand side.
(7) Removal of the Accessory Drive
(a) Install the 856A2754G02 FIXTURE, SUPPORT-AGB and the 856A2719 FIXTURE,SUPPORT-TGB R/I as follows:
1 Remove the two nuts (510), washers (515) and bolts (480) which attach the TGB housing to the horizontal drive shaft housing at the 4:30 and 7:30 o'clock positions.
2 Install the FIXTURE, 856A2719 FIXTURE,SUPPORT-TGB R/I on the 856A2754G02 FIXTURE, SUPPORT-AGB.
3 Install the tool assembly on a hydraulic hoist platform and position under the accessory gearbox assembly.
4 Use lockpins to secure the fork and the tenon. Use adjusting screws to adjust the height to the lateral supports.
5 Engage the locating pin into the rear mount of the AGB. Use the knurled nut to attach the clamp. Adjust the height of the support with the adjusting screw.
6 Adjust the height of the 856A2719 FIXTURE,SUPPORT-TGB R/I with the adjusting screws.
7 Engage the lockpins of the front plates into the TGB holes. Use the knurled knobs to adjust the front plates, if necessary.
8 Attach the rear yoke to the TGB rear mount with the lockpin.
(b) Remove and discard the cotter pins (700), (725) and (740).
(c) Remove the nuts (705), (720) and (745) and the washers (710), (730) and (750).
(d) Install the 856A2537 PROTECTOR-MOUNTING PIN on the mounting pins (680), (715) and (735).
(e) Remove the three mounting pins (680), (715) and (735) with an impact puller.
(f) Slowly and carefully lower the hydraulic hoist platform and separate the accessory drive assembly from the engine.
(g) Two different cases can appear when you remove the accessory drive assembly from the engine:
1 If the radial drive shaft (675) comes with the TGB, remove the radial drive shaft (675) from the TGB.
2 If the radial drive shaft (675) remains in the fan frame:
3 Install a 856A2727 PULLER RADIAL DRIVE SHAFT in the radial drive shaft.
4 Remove the radial drive shaft (675) from the fan frame with a HAMMER - SLIDE.
5 Remove the tools from the radial drive shaft.
(h) Remove the O-ring (755) from the radial drive shaft. Discard the O-ring (755).
(i) Store the radial drive shaft in its storage tube (765).
(8) Removal of the TGB from the AGB
(a) Disengage the horizontal drive shaft (Ref. AMM TASK 72-63-00-860-001).
(b) Remove the nuts (510), the washers (515) and the bolts (480) from the TGB/AGB interface.
(c) Remove the brackets (485), (505), (520) and (525).
(d) Remove the TGB from the AGB and from the 856A2719 FIXTURE,SUPPORT-TGB R/I. Keep the gasket (500).
(e) Remove the O-ring (495) from the oil distributor in the bevel gear.
1 Install a cap on the upper face of the TGB housing.
2 Install a cap on the TGB oil supply nipple.
3 Install a plug in the TGB scavenge port.
4 Install a plug in the TGB vent port.
5 Install a cover on the forward face of the TGB housing.
(g) Place the TGB in a storage container.
(9) Removal of the AGB from the Tools
(a) Engage the horizontal drive shaft (Ref. AMM TASK 72-63-00-860-001).
(b) Remove the O-ring (490) from the horizontal drive shaft. Discard the O-ring (490).
(10) When you remove all equipment from the AGB, apply storage oil on all bearings as follows:
Mix 7 percent of corrosion protective additive (Material No.CP5075) with 93 percent of engine oil (Material No.CP2442) and lightly coat all bearings with a PIPETTE.
(a) Install the AGB blanking kit (775) as follows:
1 Install a cap on the lubrication unit pad.
2 Install a cap on the hydraulic pump pad.
3 Install a cap on the alternator pad.
4 Install a cap on the IDG pad.
5 Install a cap on the fuel pump pad.
6 Install a cap on the starter pad.
7 Install a cover on the radial drive shaft housing.
8 Put a CAP - BLANKING on all nipples and orifices.
(b) Install the 856A3519 SLING LIFT AGB as follows:
1 Attach the two sectors at each end of the AGB with the two lockpins supplied.
2 Attach the 856A3519 SLING LIFT AGB to a hoist.
(c) Remove the lockpins and loosen the clamp which attach the 856A2754G02 FIXTURE, SUPPORT-AGB to the AGB.
(d) Remove the AGB from the 856A2754G02 FIXTURE, SUPPORT-AGB. Place the AGB in a storage container.
(e) Remove the 856A3519 SLING LIFT AGB from the AGB.
(1) Disengage the IDG electrical cables from the clamp on the AGB.
(2) Remove the parts which attach the AGB external parts as follows:
(a) Remove the bolts (360) and (365) to remove the FWD sump oil scavenge hose (355) from the AGB rear face.
(b) Remove and keep the gaskets (350) and (370).
(c) Remove the bolts (390) which attach the TGB oil scavenge hose (385) to the AGB rear face.
(d) Remove and keep the gasket (395).
(e) Remove the bolt (685) and the washer (690) to disconnect the bonding strip (695) from the AGB.
(3) Disconnect and remove the tubes (30) and (60) from the AGB.
(4) Disconnect the TGB oil supply tube (230) from the AGB.
(5) Removal of the Rear Sump Oil Tubes
(a) Cut and remove the lockwire.
(b) Disconnect the rear sump oil scavenge tube (270) and the rear sump oil supply tube (305) from the tube bundle.
(c) Remove the parts which attach the rear sump oil tubes as follows:
1 Remove the nut (335) and the bolt (225) from the bracket (345) on the AGB rear face.
2 Remove the outer spring clip (320), the inner spring clip (330) and the plastic bushing (325) from the rear sump oil supply tube (305).
3 Remove the nut (290) and the bolt (315) from the bracket (260) on the left-hand side of the TGB/horizontal drive shaft housing junction.
4 Remove the outer spring clip (310), the inner spring clip (295) and the plastic bushing (300) from the rear sump oil supply tube (305).
5 Remove the rear sump oil supply tube (305).
6 Remove the nut (235) and the bolt (285) from the bracket (260) on the left-hand side of the TGB/horizontal drive shaft housing junction.
7 Remove the outer spring clip (240), the inner spring clip (250) and the plastic bushing (245) from the TGB oil supply tube (230).
8 Remove the outer spring clip (275), the inner spring clip (265) and the plastic bushing (255) from the rear sump oil scavenge tube (270).
9 Remove the bolts (280) which attach the rear sump oil scavenge tube (270) to the AGB rear face.
10 Remove the rear sump oil scavenge tube (270) from the AGB rear face.
11 Remove and keep the gasket (340).
(6) Removal of the TGB External Parts
(a) Disconnect the TGB oil supply tubes (230) from the TGB left-hand side and remove the tubes (230).
(b) Remove the parts which attach the TGB external parts as follows:
1 Remove the bolt (610) which attaches the clamp (565) to the bracket (345) on the horizontal drive shaft housing, left-hand side.
2 Remove the clamp (565) which attaches the HJ8 harness to the bracket (345).
3 Remove the bolt (605) which attaches the clamp (600) to the bracket (535) on the AGB/TGB interface, left hand side.
4 Remove the clamp (600) which attaches the HJ8 harness to the bracket (535).
5 Remove the bolt (590) which attaches the clamp (595) to the bracket (345) on the horizontal drive shaft housing, left-hand side.
6 Remove the clamp (595) which attaches the HJ7 harness to the bracket (345).
7 Remove the bolt (585) which attaches the clamp (580) to the bracket (260) on the AGB/TGB interface, left-hand side.
8 Remove the clamp (580) which attaches the HJ7 harness to the bracket (260).
9 Remove the bolts (665) which attach the brackets (660) and (670) to the TGB right-hand side with electrical harness. Remove the brackets (660) and (670).
10 Remove the bolts (655) and the washers (650) which attach the bracket (645) to the TGB right hand side.
11 Remove the nuts (635) and the bolts (640) which attach the bracket (645) to the bracket (505) on the TGB right-hand side. The bracket (645) is attached to the electrical harnesses.
12 Remove the bolts (625) which attach the bracket (630) to the TGB left-hand side.
13 Remove the bolts (380) and the TGB oil scavenge hose (385) from the TGB left-hand side.
14 Remove and keep the gasket (375).
15 Remove the nuts (575), the bolts (570) and the brackets (260), (535) from the bracket (520) on the AGB/TGB interface, left-hand side.
(7) Removal of the Accessory Drive
(a) Install the 856A2754G02 FIXTURE, SUPPORT-AGB and the 856A2719 FIXTURE,SUPPORT-TGB R/I as follows:
1 Remove the two nuts (510), washers (515) and bolts (480) which attach the TGB housing to the horizontal drive shaft housing at the 4:30 and 7:30 o'clock positions.
2 Install the FIXTURE, 856A2719 FIXTURE,SUPPORT-TGB R/I on the 856A2754G02 FIXTURE, SUPPORT-AGB.
3 Install the tool assembly on a hydraulic hoist platform and position under the accessory gearbox assembly.
4 Use lockpins to secure the fork and the tenon. Use adjusting screws to adjust the height to the lateral supports.
5 Engage the locating pin into the rear mount of the AGB. Use the knurled nut to attach the clamp. Adjust the height of the support with the adjusting screw.
6 Adjust the height of the 856A2719 FIXTURE,SUPPORT-TGB R/I with the adjusting screws.
7 Engage the lockpins of the front plates into the TGB holes. Use the knurled knobs to adjust the front plates, if necessary.
8 Attach the rear yoke to the TGB rear mount with the lockpin.
(b) Remove and discard the cotter pins (700), (725) and (740).
(c) Remove the nuts (705), (720) and (745) and the washers (710), (730) and (750).
(d) Install the 856A2537 PROTECTOR-MOUNTING PIN on the mounting pins (680), (715) and (735).
(e) Remove the three mounting pins (680), (715) and (735) with an impact puller.
(f) Slowly and carefully lower the hydraulic hoist platform and separate the accessory drive assembly from the engine.
(g) Two different cases can appear when you remove the accessory drive assembly from the engine:
1 If the radial drive shaft (675) comes with the TGB, remove the radial drive shaft (675) from the TGB.
2 If the radial drive shaft (675) remains in the fan frame:
3 Install a 856A2727 PULLER RADIAL DRIVE SHAFT in the radial drive shaft.
4 Remove the radial drive shaft (675) from the fan frame with a HAMMER - SLIDE.
5 Remove the tools from the radial drive shaft.
(h) Remove the O-ring (755) from the radial drive shaft. Discard the O-ring (755).
(i) Store the radial drive shaft in its storage tube (765).
(8) Removal of the TGB from the AGB
(a) Disengage the horizontal drive shaft (Ref. AMM TASK 72-63-00-860-001).
(b) Remove the nuts (510), the washers (515) and the bolts (480) from the TGB/AGB interface.
(c) Remove the brackets (485), (505), (520) and (525).
(d) Remove the TGB from the AGB and from the 856A2719 FIXTURE,SUPPORT-TGB R/I. Keep the gasket (500).
(e) Remove the O-ring (495) from the oil distributor in the bevel gear.
NOTE: Make sure that O-ring (495) is serviceable and O-ring outer diameter is correct. If it is not serviceable, remove and discard it with PLIERS - NOSE, SOFT, LONG.
(f) Install the TGB blanking kit (760) as follows: 1 Install a cap on the upper face of the TGB housing.
2 Install a cap on the TGB oil supply nipple.
3 Install a plug in the TGB scavenge port.
4 Install a plug in the TGB vent port.
5 Install a cover on the forward face of the TGB housing.
(g) Place the TGB in a storage container.
(9) Removal of the AGB from the Tools
(a) Engage the horizontal drive shaft (Ref. AMM TASK 72-63-00-860-001).
(b) Remove the O-ring (490) from the horizontal drive shaft. Discard the O-ring (490).
(10) When you remove all equipment from the AGB, apply storage oil on all bearings as follows:
Mix 7 percent of corrosion protective additive (Material No.CP5075) with 93 percent of engine oil (Material No.CP2442) and lightly coat all bearings with a PIPETTE.
(a) Install the AGB blanking kit (775) as follows:
1 Install a cap on the lubrication unit pad.
2 Install a cap on the hydraulic pump pad.
3 Install a cap on the alternator pad.
4 Install a cap on the IDG pad.
5 Install a cap on the fuel pump pad.
6 Install a cap on the starter pad.
7 Install a cover on the radial drive shaft housing.
8 Put a CAP - BLANKING on all nipples and orifices.
(b) Install the 856A3519 SLING LIFT AGB as follows:
1 Attach the two sectors at each end of the AGB with the two lockpins supplied.
2 Attach the 856A3519 SLING LIFT AGB to a hoist.
(c) Remove the lockpins and loosen the clamp which attach the 856A2754G02 FIXTURE, SUPPORT-AGB to the AGB.
(d) Remove the AGB from the 856A2754G02 FIXTURE, SUPPORT-AGB. Place the AGB in a storage container.
(e) Remove the 856A3519 SLING LIFT AGB from the AGB.