Removal of the External Gearbox [IAE]

TASK 72-60-00-000-010-B
Removal of the External Gearbox

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	COVER - PROTECTION
No specific	AR	WARNING NOTICE(S)
IAE1F10011	1	PIN, HANDLING
IAE1F10021	1	STAND, STORAGE
IAE1F10022	1	JACK, HYDRAULIC
IAE1F10023	1	ADAPTER, HANDLING
IAE1F10026	1	PUMP-HYDRAULIC
IAE1F10292	1	PULLER-REMOVAL
IAE1F10293	1	PULLER-REMOVAL
IAE1F10294	1	PULLER-REMOVAL
IAE1F10412	1	PUSHER-PULLER,R/I

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 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 72-60-00-000-011-B	Removal of Units and Related Parts Necessary to Remove the External Gearbox
External Gearbox-Support Tooling
External Gearbox
Gearbox Pins

3. Job Set-up
Subtask 72-60-00-941-056-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 72-60-00-010-059-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 72-60-00-680-053-A ** ON A/C NOT FOR ALL

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

Subtask 72-60-00-010-060-A ** ON A/C NOT FOR ALL

D. Remove the related parts and the light duty electrical harness from the module where necessary (Ref. AMM TASK 72-60-00-000-011).

4. Procedure
Subtask 72-60-00-480-053-A ** ON A/C NOT FOR ALL

A. Install the External Gearbox Support Tools

External Gearbox-Support Tooling ** ON A/C NOT FOR ALL

(1) Install the two IAE1F10011 PIN, HANDLING (4), on the ground handling bosses on the bottom of the gearbox.
(2) If necessary Install the IAE1F10026 PUMP-HYDRAULIC, on the IAE1F10022 JACK, HYDRAULIC.
(3) Install the IAE1F10023 ADAPTER, HANDLING (2), on the plate of the IAE1F10022 JACK, HYDRAULIC. Make sure the adjustable support of the hydraulic jack is in lowered position.
(4) Move the IAE1F10022 JACK, HYDRAULIC (3), with the gearbox adapter below the engine. Operate the hydraulic pump to lift the hydraulic jack until the gearbox adapter is at about 2.75 in. (69.85 mm) from the gearbox.
(5) Turn clockwise the knob on the front of the hydraulic jack base to prevent any accidental lowering of the hydraulic jack.
(6) Align the holes on the shock absorbers (5) of the gearbox adapter (2) with the two handling pins (4). Align the angle gearbox support (10) with the angle gearbox (7).
(7) Turn clockwise the handwheel of the adjustable support of the hydraulic jack. Lift the gearbox adapter until the handling pins are fully in to the holes of the shock absorbers. Make sure the angle gearbox support touches the angle gearbox.
(8) install the two safety pins (6) in to the hole of the handling pins (4).
(9) Put the two locking rods (8) in position on the bosses (11) of the angle gearbox (7). Safety with the knobs.
(10) Turn clockwise the handwheel of the adjustable support to remove the weight of the external gearbox from the link.

Subtask 72-60-00-020-066-A ** ON A/C NOT FOR ALL

B. Disconnect the External Gearbox from the Engine

External Gearbox ** ON A/C NOT FOR ALL

(1) Disconnect the right hand link on the front of the gearbox
(a) Remove the two bolts that safety the bonding strap and the pins. Remove the bonding strap. Install again the bolts and tighten by hand.
(b) Remove the two nuts, washers and bolts which attach the two brackets to the intermediate case flange.
(2) Disconnect the left hand link on the front of the gearbox
(a) Remove the two bolts that safety the bonding strap and the pins. Remove the bonding strap. Install again the bolts and tighten by hand.
(b) Remove the two nuts, washers and bolts which attach the two brackets to the intermediate case flange.
(3) Remove the two nuts, washers and bolts which attach the brackets of the rear link to the intermediate case flange.
(4) Disconnect the front center link

NOTE: Do the subsequent operation to get easier access to the front link of the gearbox.

(5) Move the external gearbox away from the engine:

CAUTION: DO NOT PUT LOAD ON THE FRONT LINK AND BRACKETS WITH THE WEIGHT OF THE GEARBOX DURING THE SUBSEQUENT OPERATION.

(a) Turn counterclockwise the handwheel of the adjustable support to move the external gearbox away from the engine until the link is in vertical position.
(b) Remove the two nuts, washers and bolts which attach the brackets to the intermediate case flange.
(6) Remove the external gearbox from the engine

External Gearbox ** ON A/C NOT FOR ALL

(7) Turn counterclockwise the knob on the front of the hydraulic jack base to lower the hydraulic jack. Move the external gearbox from the engine.
(8) Remove and discard the seal ring from the PTO shaft seal tube on the engine.

Subtask 72-60-00-480-054-A ** ON A/C NOT FOR ALL

C. Put the Adapter Gearbox/External Gearbox Assemblies in the IAE1F10021 STAND, STORAGE
(1) Move the hydraulic jack to the front of the opened side of the storage stand.
(2) If necessary, lift the hydraulic jack until the gearbox adapter is higher than the storage stand.
(3) Move the hydraulic jack and align the gearbox adapter with the support of the storage stand.
(4) Slowly lower the hydraulic jack until the gearbox adapter touches the support of the storage stand. Safety with the quick release pins. Remove the hydraulic jack from the storage stand.

Subtask 72-60-00-010-061-A ** ON A/C NOT FOR ALL

D. Remove the Support Link Assemblies from the External Gearbox

Gearbox Pins ** ON A/C NOT FOR ALL

(1) Remove the right hand link with the IAE1F10292 PULLER-REMOVAL
(a) Remove the bolt that safeties the pin to the lug.
(b) Remove the hexagonal head screw from the puller support (if installed).
(c) Put the IAE1F10292 PULLER-REMOVAL, against the gearbox lug. Align and install the rod of the pusher in to the hole on the lug adjacent to the pin.
(d) Put the driver bolt through the smaller hole of the puller support and install in to the bolt hole of the pin.
(e) Put the hexagonal head screw through the larger hole of the puller support and through the internal hole of the pin. Install the special nut on the threaded end of the hexagonal head screw and turn against the pin.
(f) Turn the hexagonal head screw with a standard wrench until the pin is removed from the lugs.
(g) Remove the driver bolt and the pusher from the gearbox lug. Remove the special nut and remove the pin from the hexagonal head screw.
(2) Remove the left hand link with the IAE1F10293 PULLER-REMOVAL
(a) Remove the bolt that safeties the pin to the lug.
(b) Remove the hexagonal head screw from the puller support (if installed).
(c) Put the IAE1F10293 PULLER-REMOVAL, against the gearbox lug. Align and install the rod of the pusher in to the hole on the lug adjacent the pin.
(d) Put the driver bolt through the smaller hole of the puller support and install in to the bolt hole of the pin.
(e) Put the hexagonal head screw through the larger hole of the puller support and through the internal hole of the pin. Install the special nut on the threaded end of the hexagonal head screw and turn against the pin.
(f) Turn the hexagonal head screw with a standard wrench until the pin is removed from the lugs.
(g) Remove the driver bolt and the puller from the gearbox lug. Remove the special nut and remove the pin from the hexagonal head screw.
(3) Remove the center link with the IAE1F10294 PULLER-REMOVAL
(a) Remove the bolt that safeties the pin to the lug.
(b) Remove the hexagonal head screw from the puller support (if installed).
(c) Put the IAE1F10294 PULLER-REMOVAL against the gearbox lug.
(d) Put the driver bolt through the smaller hole of the puller support and install in to the bolt hole of the pin.
(e) Put the hexagonal head screw through the larger hole of the puller support and through the internal hole of the pin. Install the special nut on the threaded end of the hexagonal head screw and turn against the pin.
(f) Turn the hexagonal head screw with a standard wrench until the pin is removed from the lugs.
(g) Remove the driver bolt and the puller from the gearbox lug. Remove the special nut and remove the pin from the hexagonal head screw.
(4) Remove the rear link from the angle gearbox support
(a) Remove the bolt and washer which attach the rear pin to the lug.
(b) Put the fork of the IAE1F10412 PUSHER-PULLER,R/I in to the groove of the pin.
(c) Hold the pusher/puller by hand and hit the handle with a hammer until the pin is removed from the lugs.
(5) Remove the brackets and the pins from the three front links
(a) Remove the brackets from the free ends of the three pins.
(b) Remove the bolts which attach the pins to the brackets.
(c) Remove the pins from the three links. Use a soft drift.
(d) Remove the remaining brackets from the pins.
(6) Remove the brackets and the pin from the rear link
(a) Remove the two brackets from the ends of the pin.
(b) Remove the pin from the rear link. Use a soft drift.
(7) Put the applicable COVER - PROTECTION on all the openings.

[Rev.10 from 2021] 2026.04.01 02:46:42 UTC