Removal of Units and Related Parts Necessary to Remove the External Gearbox [IAE]

TASK 72-60-00-000-011-B
Removal of Units and Related Parts Necessary to Remove the External Gearbox

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

1. Reason for the Job
This procedure gives access to the removal and installation of the external gearbox.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-13-79-610-010-A	Drain the Engine Oil System
TASK 24-21-51-000-010-A	Removal of the Integrated Drive Generator -IDG 1(2)
TASK 29-11-51-000-010-A	Removal of the Engine Pump
TASK 29-13-51-000-010-A	Removal of the Engine Pump
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 73-12-41-000-010-B	Removal of the Low Pressure (LP)/High Pressure (HP) Fuel Pump
TASK 73-22-52-000-010-B	Removal of the Fuel Metering Unit (FMU)
TASK 73-31-17-000-010-B	Removal of the Fuel Flow Transmitter
TASK 79-22-41-000-010-A	Removal of the Scavenge Oil Pump
TASK 80-13-41-000-010-A	Removal of the Starter
Disconnect the Electrical Harness from the External Gearbox
Remove the Modulating Valve Fuel Supply Tube (6)
Remove the HP Servo Fuel Tube (3)
Remove the Fuel Servo Return Tube (3)
Remove the LP Fuel Tubes (9) and (4)
Remove the HP Servo Fuel Tubes (2) and (25)
Remove the No. 1, 2 and 3 Bearing Compartment Scavenge Tube Assembly
Disconnect the Oil Pump Scavenge Tube (2)
Disconnect the FCOC Oil Tubes (1)
Disconnect the FCOC Oil Tubes (3) and (4)
Disconnect the FCOC fuel Tubes (2) and (4)
Remove the IDG Oil Cooling Tubes (5) and (8)
Disconnect the No. 4 Bearing Scavenge Valve Tubes (3) and (6)
Disconnect the No. 1, 2 and 3 Bearing Compartment Vent tube (4)
Disconnect the Scavenge Filter Differential Pressure Switch Tubes (3) and (7)

3. Job Set-up
Subtask 72-60-00-941-055-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 72-60-00-010-058-A ** ON A/C NOT FOR ALL

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

Subtask 72-60-00-680-051-A ** ON A/C NOT FOR ALL

C. Drain the engine oil system (Ref. AMM TASK 12-13-79-610-010).

4. Procedure
Subtask 72-60-00-020-058-A ** ON A/C NOT FOR ALL

A. Disconnection of Electrical Harness Connectors
(1) Disconnect the electrical harness connectors from the external gearbox.

Disconnect the Electrical Harness from the External Gearbox ** ON A/C NOT FOR ALL

(a) Disconnect the electrical connectors 4000KC-A, 4000KC-B and 4000KC-C from the Fuel Metering Unit (FMU).
(b) Disconnect the electrical connectors 4004EN-A from the oil scavenge filter.
(c) Disconnect the electrical connector 4002EN-A from the oil tank.
(d) Disconnect the electrical connectors 4005EV-A and 4005EV-B from the dedicated alternator.
(e) Disconnect the electrical connector 4006EN-A from the No.4 bearing scavenge valve.
(f) Disconnect the electrical connector 1030GK-A from the hydraulic pump.
(g) Disconnect the electrical connectors 4000XU-A, 4000XU-B and 4000XU-C from the Integrated Drive Generator (IDG).
(h) Disconnect the IDG cable assembly from the IDG.
1 Remove the bolts (5) and the washers (4) and remove the cover (6) from the terminal block (3).
2 Attach a temporary identification tag to each cable.

NOTE: This will make sure each cable is installed on the correct terminal.

3 Remove the four nuts (2) and the washer (1) and disconnect the IDG cable assembly from the terminals. Install the four nuts, the washers and the cover.
(2) Move the electrical harness clear of the external gearbox.

Disconnect the Electrical Harness from the External Gearbox ** ON A/C NOT FOR ALL

(a) Remove the nut (16), the washer (22), the bolt (19) and the washer (18) which attach the clip (17) to the clip (21). Detail B.
(b) Remove the nut (23) and the washers (28) which attach the clips (26) to the clip (27). Detail C.
(c) Remove the nut (34), the washer (33) and the bolt (29) which attach the clip (31) to the clip (32). Detail D.
(d) Remove the nut (36), the bolt (38) and the washers (39) which attach the clips (27) to the bracket (35). Detail E.
(e) Remove the nut (50), the bolt (53) and the washer (52) which attach the clips (51) to the bracket (40). Detail F.
(f) Remove the nuts (55), the bolts (54) and the washers (57) which attach the clips (56) to the tubes (20). Detail G.
(g) Remove the nut (59), the bolt (58) and the washer (61) which attach the clip (61) to tube. Detail H.
(h) Remove the nut (65), the bolt (62) and the washer (63) which attach the clips (64) and (66) to the raceway. Detail J.
(i) Remove the nut (77), the bolt (78) and the washer (79) which attach the clip (80) to the tube. Detail K.
(j) Remove the bolts (81), and the washer (83) which attach the clips (82) to the bracket. Detail L.
(k) Remove the nut (90), the washers (91) and (85) and the bolt (84) which attach the clips (86) and (92) and the spacers (87) and (93) to the tube (88). Detail M.
(l) Remove the nut (97), the washer (99) and the bolt (94) which attach the clips (95) and (98) to the tube (96). Detail N.
(m) Remove the bolt (109) and the washer (116) which attach the clips (110), (113) and (115) to the spacers (111) and (112). Detail P.
(n) Remove the nut (123), the washer (122) and (118), the bolt (117) which attach the clips (119) and (121) to the spacer (125) to the tube. Detail Q.
(o) Disconnect the electrical connector 4000EL-A from the fuel filter differential pressure switch.
(p) Temporarily attach the electrical harness clear of the gearbox.

Subtask 72-60-00-020-059-A ** ON A/C NOT FOR ALL

B. Remove the Starter 100KM (Ref. AMM TASK 80-13-41-000-010).

Subtask 72-60-00-020-060-A ** ON A/C NOT FOR ALL

C. Disconnection of Fuel Tubes
(1) Remove the Air Modulating Valve Fuel Supply Tube

Remove the Modulating Valve Fuel Supply Tube (6) ** ON A/C NOT FOR ALL

(a) Remove the bolts (39) and the washers (40) which attach the clips (41) to the bracket. Detail D.
(b) Remove the nut (43), the washer (44), the bolt (42) which at tach the clip (45) to the tube. Detail E.
(c) Disconnect the tube (6) from the tubes (3) and (7) and remove the tube (6).
(2) Remove the HP Servo Fuel Tube

Remove the HP Servo Fuel Tube (3) ** ON A/C NOT FOR ALL

NOTE: Some fuel drainage could occur during this procedure. It is recommended that an applicable container is available.

(a) Remove the three bolts (1) that attach the tube (3) to the FMU and remove and discard the sealing ring (2).
(b) Disconnect the tube (4) from the tube (3).
(c) Disconnect the tube (3) from the tube (5).
(d) Remove the bolt (16) and the washer (18) which attach the clip (17) to the bracket. Detail A.
(e) Remove the nut (24), the washer (23), the bolt (19) and the washer (20) which attach the clips (22) and (26) and the spacer (25) to the tube (21). Detail B.
(f) Remove the bolt (27) and the washer (29) which attach the clip (28) to the bracket. Detail C.
(g) Remove the tube (3).
(3) Remove the Fuel Servo Return Tube

Remove the Fuel Servo Return Tube (3) ** ON A/C NOT FOR ALL

NOTE: Some fuel drainage could occur during this procedure. It is recommended that an applicable container is available.

(a) Remove the nut (4), the washer (9) which attach the clips (7) and (8), the spacers (5) and (6) and the raceway to the bracket. Detail A.
(b) Disconnect the tube (3) from the tube (10).
(c) Remove the three bolts (1) that attach the tube (3) to the FMU and remove the tube (3). Remove and discard the sealing ring (2).
(4) Remove the LP Fuel Tube

Remove the LP Fuel Tubes (9) and (4) ** ON A/C NOT FOR ALL

NOTE: Some fuel drainage could occur during this procedure. It is recommended that an applicable container is available.

(a) Remove the bolt (54), the washer (63) and the two spacers (57) and (59) which attach the clips (62), (61), and (58) to the bracket. Detail D.
(b) Remove the four bolts (8) which attach the tube (9) to the fuel pump and remove and discard the sealing ring (7).
(c) Remove the three bolts (10) and the washers (11) which attach the tube (9) to the fuel filter and remove and discard the sealing ring (12). Remove the tube (9).
(5) Remove the Fuel Servo Tubes

Remove the HP Servo Fuel Tubes (2) and (25) ** ON A/C NOT FOR ALL

(a) Remove the nut (4), the bolt (1) and the washer (6) which attach the clip (5) to the tube (3). Detail A.
(b) Remove the bolt (16) and the washer (17) which attach the clips (18) to the bracket. Detail B.
(c) Remove the bolt (20) and the washer (21) which attach the clip (22) to the bracket. Detail C.
(d) Remove the bolt (23) and the washer (27) which attach the clip (24) and (26) to the bracket. Detail D.
(e) Disconnect the tubes (2) and (25) from the fuel diverter and remove the tube (19) from the tube (2).
(6) Remove the FMU Spill Tube

Remove the LP Fuel Tubes (9) and (4) ** ON A/C NOT FOR ALL

NOTE: Some fuel drainage could occur during this procedure. It is recommended that an applicable container is available.

(a) Remove the nut (25), the bolt (22) and the washer (23) which attach the clip (24) to the tube (26). Detail A.
(b) Remove the bolt (27) and the washer (28) which attach the clip (29) to the bracket. Detail B.
(c) Remove the nut (41), the washer (42), the bolt (39) and the spacer (44) which attach the clips (40) and (43) to the tube (26). Detail C.
(d) Remove the three bolts (5) which attach the tube (4) to the FMU and remove and discard the sealing ring (6).
(e) Remove the two bolts (3) which attach the tube (4) to the Diverter Valve and remove and discard the three sealing rings (1) and (2) and the seal housing (13). Remove the tube (4).

Subtask 72-60-00-020-061-A ** ON A/C NOT FOR ALL

D. Disconnection of Oil Tubes
(1) Remove the No.1, 2 and 3 Bearing Compartment Scavenge Tube Assembly

Remove the No. 1, 2 and 3 Bearing Compartment Scavenge Tube Assembly ** ON A/C NOT FOR ALL

NOTE: Some oil drainage could occur during this procedure. It is recommended that an applicable container be available.

(a) Remove the three bolts (16) which attach the tube (5) to the LP Compressor/Intermediate case and remove and discard the sealing ring (17).
(b) Remove the three bolts (18) which attach the tube (6) to the scavenge pump and remove and discard the sealing ring (19).
(c) Remove the scavenge tube assembly.
(2) Disconnect the Oil Feed Tube

Remove the No. 1, 2 and 3 Bearing Compartment Scavenge Tube Assembly ** ON A/C NOT FOR ALL

NOTE: Some oil drainage could occur during this procedure. It is recommended that an applicable container be available.

(a) Disconnect the tube (4) from the tube (2), remove the restrictor (1) and remove and discard the retaining ring (3).
(3) Disconnect the Oil Scavenge Tube

Disconnect the Oil Pump Scavenge Tube (2) ** ON A/C NOT FOR ALL

NOTE: Some oil drainage could occur during this procedure. It is recommended that an applicable container be available.

(a) Disconnect the tube (2) from the tube (1).
(4) Disconnect the Oil Spill Tube

Disconnect the FCOC Oil Tubes (1) ** ON A/C NOT FOR ALL

(a) Disconnect the tube (1) from the oil tank.
(5) Disconnect the ACOC Oil Tubes

Disconnect the FCOC Oil Tubes (3) and (4) ** ON A/C NOT FOR ALL

NOTE: Some oil drainage could occur during this procedure. It is recommended that an applicable container be available.

(a) Disconnect the tube (4) from the tube adjacent to the oil tank and the tube (1) adjacent to the deoiler.
(b) Disconnect the tube (3) from the tube (2) adjacent to the deoiler.

Subtask 72-60-00-020-073-A ** ON A/C NOT FOR ALL

E. Remove the scavenge oil pump
(1) Remove the scavenge oil pump (Ref. AMM TASK 79-22-41-000-010).

Subtask 72-60-00-020-062-A ** ON A/C NOT FOR ALL

F. Disconnection of Fuel Tubes
(1) Disconnect the LP Fuel Tubes

Disconnect the FCOC fuel Tubes (2) and (4) ** ON A/C NOT FOR ALL

(a) Remove the three bolts (3) which attach the tube (4) to the fuel pump and remove the sealing ring (6) and the bracket (5). Discard the sealing ring (6).
(b) Remove the three bolts (1) which attach the tube (2) to the fuel pump and remove and discard the sealing ring (7).
(2) Disconnect the Fuel Flow Transmitter Inlet Tube

Disconnect the FCOC fuel Tubes (2) and (4) ** ON A/C NOT FOR ALL

NOTE: Some fuel drainage could occur during this procedure. It is recommended that an applicable container be available.

(a) Remove the three bolts which attach the tube (8) tothe FMU and remove and discard the sealing ring.

Subtask 72-60-00-020-074-A ** ON A/C NOT FOR ALL

G. Remove the HP/LP fuel pump
(1) Remove the HP/LP fuel pump (Ref. AMM TASK 73-12-41-000-010).

Subtask 72-60-00-020-075-A ** ON A/C NOT FOR ALL

H. Remove the Fuel Metering Unit
(1) Remove the Fuel Metering Unit (Ref. AMM TASK 73-22-52-000-010).

Subtask 72-60-00-020-076-A ** ON A/C NOT FOR ALL

I. Remove the Fuel Flow Transmitter
(1) Remove the Fuel Flow Transmitter (Ref. AMM TASK 73-31-17-000-010).

Subtask 72-60-00-020-063-A ** ON A/C NOT FOR ALL

J. Disconnection of Oil Tubes
(1) Remove the IDG Oil Cooling Tubes

Remove the IDG Oil Cooling Tubes (5) and (8) ** ON A/C NOT FOR ALL

NOTE: Some oil drainage could occur during this procedure. It is recommended that an applicable container be available.

(a) Remove the bolt (1), the washer (2) and the spacer (4) which attach the clip (3) to the bracket. Detail A.
(b) Remove the bolt (6), the washer (7) and the spacer (9) which attach the clip (10) to the bracket. Detail B.
(c) Disconnect the tubes (8) and (5) from the IDG and from the tubes (20) and (21). Remove the tubes (8) and (5).
(2) Disconnect the No.4 Bearing Scavenge Tubes

Disconnect the No. 4 Bearing Scavenge Valve Tubes (3) and (6) ** ON A/C NOT FOR ALL

NOTE: Some oil drainage could occur during this procedure. It is recommended that an applicable container be available.

(a) Remove the bolt (1), the washer (2) which attach the clip (5) to the bracket.
(b) Disconnect the tube (3) from the No.4 bearing scavenge valve.
(c) Disconnect the tube (6) from the No.4 bearing scavenge valve.
(3) Disconnect the No.1, 2 and 3 Bearing Compartment Vent Tube

Disconnect the No. 1, 2 and 3 Bearing Compartment Vent tube (4) ** ON A/C NOT FOR ALL

NOTE: Some oil drainage could occur during this procedure. It is recommended that an applicable container be available.

(a) Remove the bolt (8), the washer (9) and the spacers (6) and (11) which attach the clips (5) and (10) to the bracket (2).
(b) Remove the three bolts (1) which attach the tube (4) to the deoiler and remove the bracket (2). Remove and discard the sealing ring (3).
(4) Disconnect the Scavenge Filter Differential Pressure Oil Tubes

Disconnect the Scavenge Filter Differential Pressure Switch Tubes (3) and (7) ** ON A/C NOT FOR ALL

(a) Remove the nut (1) the washer (8) and the bolt (5) which attach the clips (2) and (4) and the spacer (6) to the tube (3). Detail B.
(b) Remove the bolt (12) and the washer (11) which attach the clips (10) and (13) and the spacer (9) to the bracket. Detail C.
(c) Disconnect the tubes (3) and (7) from the scavenge filter.

Subtask 72-60-00-020-077-A ** ON A/C NOT FOR ALL

K. Remove IDG
(1) Remove IDG (Ref. AMM TASK 24-21-51-000-010).

Subtask 72-60-00-020-064-A ** ON A/C NOT FOR ALL

L. Disconnect the Hydraulic Pump Hoses

Disconnect the FCOC Oil Tubes (3) and (4) ** ON A/C NOT FOR ALL

WARNING: DO NOT GET HYDRAULIC FLUID ON YOUR SKIN, IN YOUR EYES OR IN YOUR MOUTH. HYDRAULIC FLUID IS POISONOUS AND CAN GO THROUGH YOUR SKIN AND INTO YOUR BODY. FLUSH HYDRAULIC FLUID FROM YOUR EYES, MOUTH OR SKIN WITH WATER. GET MEDICAL AID IF YOU GET HYDRAULIC FLUID IN YOUR EYES OR MOUTH.

(1) Put an applicable container below the hydraulic pump.
(2) Disconnect the hydraulic pressure hose (1) and let the hydraulic fluid drain in to the container until the flow of fluid stops.
(3) Disconnect the hydraulic suction hose (2) and let the hydraulic fluid drain in to the container until the flow of fluid stops.
(4) Disconnect the hydraulic case drain hose (3) and let the hydraulic fluid drain in to the container until the flow of fluid stops.
(5) Remove the container and discard the drained hydraulic fluid.

Subtask 72-60-00-020-078-A ** ON A/C NOT FOR ALL

M. Remove the Hydraulic Pump
(1) Remove the Hydraulic Pump (Ref. AMM TASK 29-11-51-000-010) or (Ref. AMM TASK 29-13-51-000-010).

[Rev.10 from 2021] 2026.04.01 13:01:28 UTC