Removal of the Accessory Gearbox (AGB) Assembly [CFML]

TASK 72-63-00-000-802-A
Removal of the Accessory Gearbox (AGB) Assembly

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

ZONE: 400
FIN: 4020KM1
FIN: 4020KM2

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 - PROTECTION
No specific	1	CONTAINER 5 L (1.32 USGAL)
No specific	AR	COVER - PROTECTION
No specific	AR	WARNING NOTICE(S)
956A7018	1	FIXTURE, REMOVE/ INSTALL - AGB ASSEMBLY
956A7613	1	ADAPTER, LOCK - CORE ENGINE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-13-79-610-802-A	Draining of the Accessory Gearbox (AGB)
TASK 24-21-51-000-806-A	Removal of the Integrated Drive Generator (IDG) - IDG 1(2)
TASK 26-12-18-000-801-A	Removal of the Fan Area Fire-Detection Elements
TASK 29-11-51-000-808-A	Removal of the Engine Pump
TASK 71-13-11-000-806-A	Removal of the Fan Cowl Doors
TASK 72-23-06-000-801-A	Removal of the Accessory Gearbox (AGB) Link
TASK 72-62-00-000-803-A	Disconnection of the Slider
TASK 72-62-41-000-801-A	Removal of the Transfer Shaft of the Accessory Gearbox (AGB)
TASK 72-63-03-000-801-A	Removal of the Manual-Control Cover of the Accessory Gearbox (AGB)
TASK 73-11-05-000-801-A	Removal of the Main Fuel Pump
TASK 73-21-40-000-802-A	Removal of the Permanent Magnet Alternator (PMA) Stator
TASK 73-21-60-000-804-A	Removal of the HJ3A Engine Wiring Harness
TASK 73-21-60-000-805-A	Removal of the HJ3B Engine Wiring Harness
TASK 73-21-60-000-809-A	Removal of the HJ5B Engine Wiring Harness
TASK 73-21-60-000-810-A	Removal of the HJ6A Engine Wiring Harness
TASK 73-21-60-000-811-A	Removal of the HJ6B Engine Wiring Harness
TASK 79-21-05-000-804-A	Removal of the Lubrication Unit
TASK 79-32-05-000-801-A	Removal of the Oil Pressure and Temperature Sensor
TASK 80-11-05-000-801-A	Removal of the Pneumatic Air Starter
AGB Assembly

3. Job Set-up
Subtask 72-63-00-941-065-A

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate:

The ENG/MODE selector switch, and
The ENG/MASTER 1(2) control switch.

(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 72-63-00-010-077-A

B. Get Access
(1) Remove the fan cowl doors (Ref. AMM TASK 71-13-11-000-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR

4. Procedure

WARNING: USE PERSONAL PROTECTION EQUIPMENT. USE THE ENGINE OIL IN A WELL-VENTILATED AREA. ENGINE OIL IS TOXIC.

Subtask 72-63-00-020-074-B

A. Removal of the AGB Assembly

CAUTION: USE A SECOND WRENCH TO APPLY COUNTERTORQUE WHEN YOU DISCONNECT/CONNECT RIGID TUBES. IF YOU DO NOT USE THE SECOND WRENCH, THERE IS A RISK THAT YOU WILL CAUSE DAMAGE TO THE TUBES.

(1) Put the CONTAINER 5 L (1.32 USGAL) below the AGB assembly (1).
(2) Drain the AGB assembly (1) (Ref. AMM TASK 12-13-79-610-802).
(3) Remove the manual control cover (65) of the AGB assembly (1) (Ref. AMM TASK 72-63-03-000-801).
(4) Install the 956A7613 ADAPTER, LOCK - CORE ENGINE through the AGB covers (handcranking cover) port to block the N2 rotor.
(5) Remove the pneumatic air starter (3) (Ref. AMM TASK 80-11-05-000-801).
(6) Remove the Integrated Drive Generator (IDG) (Ref. AMM TASK 24-21-51-000-806).
(7) Remove the Green Engine Driven Pump (EDP) (Ref. AMM TASK 29-11-51-000-808).
(8) Remove the main fuel pump (4) (Ref. AMM TASK 73-11-05-000-801).
(9) Remove the Permanent Magnet Alternator (PMA) stator (5) (Ref. AMM TASK 73-21-40-000-802).
(10) Remove the lubrication unit (6) (Ref. AMM TASK 79-21-05-000-804).
(11) Disconnect the slider (Ref. AMM TASK 72-62-00-000-803).
(12) Remove the transfer shaft of the AGB assembly (1) (Ref. AMM TASK 72-62-41-000-801).
(13) Remove the oil pressure and temperature sensor (8) (Ref. AMM TASK 79-32-05-000-801).
(14) Remove the fan fire detectors (Ref. AMM TASK 26-12-18-000-801).
(15) Disconnection of the HJ6B harness (73):
(a) Remove the bolt (72) from the clamp (66).
(b) Remove the bolt (67) from the clamp (68).
(c) Remove the bolt (69) from the clamp (71).
(d) Disengage the HJ6B harness (73) from the clips (Ref. AMM TASK 73-21-60-000-811).
(16) Disengage the HJ6A harness (77) from the clips (Ref. AMM TASK 73-21-60-000-810).
(17) Disengage the HJ5B harness (75) from the clips (Ref. AMM TASK 73-21-60-000-809).
(18) Disengage the HJ3A harness (76) from the clips (Ref. AMM TASK 73-21-60-000-804).
(19) Disengage the HJ3B harness (74) from the clips (Ref. AMM TASK 73-21-60-000-805).
(20) Disconnection of the drain tubes from the AGB assembly (1):
(a) Removal of the drain tube (9) from the AGB assembly (1):
1 Loosen the coupling nut (10) of the drain tube (9).
2 Disconnect the drain tube (9) from the AGB assembly (1).
3 Remove the bolt (11) from the clamp (12) that attaches the drain tube (9) to the bracket (35).
4 Remove the bolt (13) from the clamp (14) that attaches the drain tube (9) to the bracket (39).
5 Remove the bolt (15) from the clamp (16) that attaches the drain tube (9) to the bracket (41).
6 Remove the bolt (17) from the clamp (18) that attaches the drain tube (9) to the bracket (49).
(b) Disconnection of the drain tube (19) from the AGB assembly (1):
1 Loosen the coupling nut (20) of the drain tube (19).
2 Remove the bolt (21) from the clamp (22) that attaches the drain tube (19) to the AGB assembly (1).
3 Disconnect the drain tube (19) from the AGB assembly (1).
(c) Disconnection of the drain tube (23) from the AGB assembly (1):
1 Loosen the coupling nut (24) of the drain tube (23).
2 Disconnect the drain tube (23) from the AGB assembly (1).
(d) Removal of the drain tube (25) from the AGB assembly (1):
1 Loosen the coupling nut (26) of the drain tube (25).
2 Disconnect the drain tube (25) from the AGB assembly (1).
(21) Removal of the brackets from the AGB assembly (1):
(a) Remove the two bolts (28) that attach the bracket (27) to the AGB assembly (1).
(b) Remove the bracket (27) from the AGB assembly (1).
(c) Remove the three bolts (30) that attach the bracket (29) to the AGB assembly (1).
(d) Remove the bracket (29) from the AGB assembly (1).
(e) Remove the two bolts (32) that attach the bracket (31) to the AGB assembly (1).
(f) Remove the bracket (31) from the AGB assembly (1).
(g) Remove the two bolts (34) that attach the bracket (33) to the AGB assembly (1).
(h) Remove the bracket (33) from the AGB assembly (1).
(i) Remove the two bolts (36) that attach the bracket (35) to the AGB assembly (1).
(j) Remove the bracket (35) from the AGB assembly (1).
(k) Remove the two bolts (38) that attach the bracket (37) to the AGB assembly (1).
(l) Remove the bracket (37) from the AGB assembly (1).
(m) Remove the two bolts (40) that attach the bracket (39) to the AGB assembly (1).
(n) Remove the bracket (39) from the AGB assembly (1).
(o) Remove the two bolts (42) that attach the bracket (41) to the AGB assembly (1).
(p) Remove the bracket (41) from the AGB assembly (1).
(q) Remove the two bolts (44) that attach the bracket (43) to the AGB assembly (1).
(r) Remove the bracket (43) from the AGB assembly (1).
(s) Remove the two bolts (46) that attach the bracket (45) to the AGB assembly (1).
(t) Remove the bracket (45) from the AGB assembly (1).
(u) Remove the two bolts (48) that attach the bracket (47) to the AGB assembly (1).
(v) Remove the bracket (47) from the AGB assembly (1).
(w) Remove the two bolts (50) that attach the bracket (49) to the AGB assembly (1).
(x) Remove the bracket (49) from the AGB assembly (1).
(y) Remove the two bolts (52) that attach the bracket (51) to the AGB assembly (1).
(z) Remove the bracket (51) from the AGB assembly (1).
(22) Removal of the bonding strap (53) from the AGB assembly (1):
(a) Remove the bolt (54) that attaches the bonding strap (53) to the AGB assembly (1).
(b) Remove the bonding strap (53) from the AGB assembly (1).
(23) Disconnection of the oil tube (55) from the AGB assembly (1):
(a) Loosen the coupling nut (56) of the oil tube (55).
(b) Disconnect the oil tube (55) from the AGB assembly (1).
(24) Disconnection of the oil tube (57) from the AGB assembly (1):
(a) Remove the four bolts (58) from the oil tube (57).
(b) Disconnect the oil tube (57) from the AGB assembly (1).
(c) Remove and discard the c-seal (59) from the oil tube (57).
(25) Removal of the AGB assembly (1):

WARNING: MOVE THE ACCESSORY GEARBOX ASSEMBLY AND/OR THE GSE SLOWLY. THE ACCESSORY GEARBOX ASSEMBLY IS HEAVY. IF YOU DO NOT OBEY THIS PRECAUTION, INJURY TO PERSONNEL AND DAMAGE TO THE EQUIPMENT CAN OCCUR.

(a) Install the 956A7018 FIXTURE, REMOVE/ INSTALL - AGB ASSEMBLY on the AGB assembly (1).

NOTE: The ABG assembly (1) weighs 101.4 lb (46 kg).

(b) Removal of the AGB assembly (1) from the AGB links (Ref. AMM TASK 72-23-06-000-801):
1 Remove the AGB assembly (1) from the stirrup assembly (60).
2 Remove the AGB assembly (1) from the axial link assembly (61).
3 Remove the AGB assembly (1) from the link assembly (62).
(c) Remove the AGB gearbox assembly (1) from the spigot assembly (63) that attaches to the fan frame shroud (64).
(26) Remove the AGB assembly (1) from the engine.
(27) Remove the 956A7018 FIXTURE, REMOVE/ INSTALL - AGB ASSEMBLY from the AGB assembly (1).
(28) Install the COVER - PROTECTION and the CAP - PROTECTION on all the openings, tubes, hoses and disconnected connectors.
(29) Remove the CONTAINER 5 L (1.32 USGAL) from below the AGB assembly (1).

[Rev.10 from 2021] 2026.04.01 02:54:45 UTC