DOC AIRBUS | AMM A320FInstallation of the External Gearbox [IAE]
TASK 72-60-00-400-010-B
Installation of the External Gearbox
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 72-60-00-860-053-A ** ON A/C NOT FOR ALL
Subtask 72-60-00-820-051-A ** ON A/C NOT FOR ALL
Subtask 72-60-00-410-064-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 13:01:31 UTC
Installation of the External Gearbox
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | GUN - HOT AIR |
| No specific | AR | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 95 and 85 lbf.in (1.07 and 0.96 m.daN )  | |
| No specific | Torque wrench: range to between 220 and 180 lbf.in (2.49 and 2.03 m.daN ) | |
| No specific | Torque wrench: range to between 370 and 270 lbf.in (4.18 and 3.05 m.daN ) | |
| IAE1F10011 | 1 | PIN, HANDLING |
| IAE1F10012 | 1 | PUSHER, INSTALLATION |
| IAE1F10021 | 1 | STAND, STORAGE |
| IAE1F10022 | 2 | JACK, HYDRAULIC |
| IAE1F10023 | 1 | ADAPTER, HANDLING |
| IAE1F10026 | 1 | PUMP-HYDRAULIC |
| IAE1F10044 | 1 | DRIVER-INSTALLATION |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.V01-124) | Isopropyl Alcohol, Technical grade |
| (Material No.V10-077) | lubricant (engine oil) |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-13-79-610-011-A | Check Oil Level and Replenish |
| TASK 70-23-11-911-013-A | General Torque Tightening Techniques |
| TASK 70-23-13-911-010-A | Procedures for the Installation of Preformed Packings |
| TASK 71-00-00-710-017-B | Ground Test Requirements after Power Plant Module/Component Repair or Replacement Procedures |
| TASK 71-13-00-010-010-A | Opening of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 71-13-00-410-010-A | Closing of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 72-60-00-400-011-B | Installation of Units and Related Parts Necessary to Remove the External Gearbox |
| TASK 79-21-44-000-010-A | Removal of the Pressure Oil Filter Element |
| TASK 79-21-44-400-010-A | Installation of the Pressure Oil Filter Element |
| TASK 79-22-44-000-010-A | Removal of the Scavenge Oil Filter Element |
| TASK 79-22-44-400-010-A | Installation of the Scavenge Oil Filter Element |
External GearboxSubtask 72-60-00-860-053-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
Subtask 72-60-00-010-063-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
B. Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 72-60-00-110-053-A ** ON A/C NOT FOR ALL (1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
C. Preparation for Installation
(1) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist withV01-124 Isopropyl Alcohol, Technical grade
(2) All links, pins and brackets which attach the external gearbox to the engine.
(3) The flange and the mating diameter of the angle gearbox and the PTO shaft seal tube on the intermediate case.
(4) The flange mating surfaces on the inlet and outlet tubes.
(5) Remove the applicable covers/caps/plugs from all the openings.
Subtask 72-60-00-410-061-A ** ON A/C NOT FOR ALL (1) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with
(2) All links, pins and brackets which attach the external gearbox to the engine.
(3) The flange and the mating diameter of the angle gearbox and the PTO shaft seal tube on the intermediate case.
(4) The flange mating surfaces on the inlet and outlet tubes.
(5) Remove the applicable covers/caps/plugs from all the openings.
D. Install the Support Link Assemblies to the External Gearbox
(1) Install the three front links to the gearbox
(b) Put the hot end of the link between the lugs on the gearbox. Align the hole of the spherical bearing of the link with the hole of the lugs.
(c) Lubricate the pin withV10-077 lubricant (engine oil)
(d) Install the pin in to the hole on the front lug and push through the spherical bearing and the rear lug.
(e) Do the subsequent operations if the installation of the pin is not easy by hand
1 Align the hole on the pin flange with the hole on the front lug.
2 Put the IAE1F10044 DRIVER-INSTALLATION, through the hole on the pin flange and install in to the hole on the front lug.
3 Install the hexagonal head screw of the IAE1F10012 PUSHER, INSTALLATION, through the pin and the rear lug.
4 Install the nut on the free end of the hexagonal head screw. Turn the nut until it touches the rear lug.
5 Hold the hexagonal head screw. Turn clockwise the hexagonal nut until the pin is fully installed. Use a standard wrench.
6 Let the link get to room temperature. Remove the IAE1F10012 PUSHER, INSTALLATION, and the IAE1F10044 DRIVER-INSTALLATION, from the pin.
(f) Do the steps (1) thru (5) for the left hand link and for the center link.
(g) Install the bolts which attach the pins of the right hand link and the left hand link. Tighten by hand.
(h) Install the bolt which attaches the pin of the center link. TORQUE the bolt to between 95 and 85 lbf.in (1.07 and 0.96 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
(2) Install the rear link to the gearbox
(a) Increase the temperature of one end of the rear link to 250 deg.F (121 deg.C). Use a hot air gun.
(b) Put the hot end of the link between the lugs on the angle gearbox support. Align the hole of the spherical bearing of the link with the hole of the lugs.
(c) Lubricat the pin withV10-077 lubricant (engine oil)
(d) Install the pin in to the hole on the front lug and push through the spherical bearing and the rear lug. position.
(e) Install the washer and bolt in to the hole on the boss adjacent to the front lug.
(f) Make sure that the bolt engages with the groove of the pin.
(g) TORQUE the bolt to between 95 and 85 lbf.in (1.07 and 0.96 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
(3) Install the brackets to the three front links
(a) Increase the temperature of the free end of the right hand link to 250 deg.F (121 deg.C) maximum. Use a GUN - HOT AIR.
(b) Lubricate the pin withV10-077 lubricant (engine oil)
(c) Install the pin in to the hole of the front bracket.
(d) Align the hole on the pin flange with the hole of the bracket. Safety the pin with the bolt.
(e) Put the pin with the bracket through the hole of the spherical bearing of the link.
(f) Install the rear bracket on the free end of the pin.
(g) Keep all the parts together until the link gets to room temperature.
(h) Do the subsequent operations if the installation of the pin is not easy by hand
1 Install the hexagonal head screw of the IAE1F10012 PUSHER, INSTALLATION, through the pin and the rear bracket.
2 Install the nut on the free end of the hexagonal head screw. Turn the nut until it touches the rear bracket.
3 Hold the hexagonal head screw. Turn the hexagonal nut clockwise until the pin is fully installed. Use a standard wrench.
4 Let the link get to room temperature. Remove the pusher from the pin.
(i) Do the step (1) thru (8) for the installation of the brackets on the left hand link and on the center link.
(4) Install the brackets on the rear link
(a) Increase the temperature of the free end of the rear link to 250 deg.F (121 deg.C) maximum. Use a GUN - HOT AIR.
(b) Lubricate the pin withV10-077 lubricant (engine oil)
(c) Install the pin through the hole of the spherical bearing of the link. Push until the pin protrudes equally from each side of the spherical bearing.
(d) Install the two brackets on the two ends of the pin.
(e) Safety the brackets with the two bolts, washers and nuts. Tighten the bolts by hand.
(f) Let the link get to room temperature.
(g) Remove the two bolts, washers and nuts from the brackets.
Subtask 72-60-00-010-062-A ** ON A/C NOT FOR ALL (1) Install the three front links to the gearbox
WARNING:
YOU MUST NOT TOUCH HOT PARTS WITHOUT APPLICABLE GLOVES. HOT PARTS CAN CAUSE AN INJURY.
(a) Increase the temperature of one end of the right hand link to 250 deg.F (121 deg.C) maximum. Use a GUN - HOT AIR. (b) Put the hot end of the link between the lugs on the gearbox. Align the hole of the spherical bearing of the link with the hole of the lugs.
(c) Lubricate the pin with
(d) Install the pin in to the hole on the front lug and push through the spherical bearing and the rear lug.
(e) Do the subsequent operations if the installation of the pin is not easy by hand
1 Align the hole on the pin flange with the hole on the front lug.
2 Put the IAE1F10044 DRIVER-INSTALLATION, through the hole on the pin flange and install in to the hole on the front lug.
3 Install the hexagonal head screw of the IAE1F10012 PUSHER, INSTALLATION, through the pin and the rear lug.
4 Install the nut on the free end of the hexagonal head screw. Turn the nut until it touches the rear lug.
5 Hold the hexagonal head screw. Turn clockwise the hexagonal nut until the pin is fully installed. Use a standard wrench.
6 Let the link get to room temperature. Remove the IAE1F10012 PUSHER, INSTALLATION, and the IAE1F10044 DRIVER-INSTALLATION, from the pin.
(f) Do the steps (1) thru (5) for the left hand link and for the center link.
(g) Install the bolts which attach the pins of the right hand link and the left hand link. Tighten by hand.
(h) Install the bolt which attaches the pin of the center link. TORQUE the bolt to between 95 and 85 lbf.in (1.07 and 0.96 m.daN )
(Ref. AMM TASK 70-23-11-911-013). (2) Install the rear link to the gearbox
(a) Increase the temperature of one end of the rear link to 250 deg.F (121 deg.C). Use a hot air gun.
(b) Put the hot end of the link between the lugs on the angle gearbox support. Align the hole of the spherical bearing of the link with the hole of the lugs.
(c) Lubricat the pin with
(d) Install the pin in to the hole on the front lug and push through the spherical bearing and the rear lug. position.
(e) Install the washer and bolt in to the hole on the boss adjacent to the front lug.
(f) Make sure that the bolt engages with the groove of the pin.
(g) TORQUE the bolt to between 95 and 85 lbf.in (1.07 and 0.96 m.daN )
(Ref. AMM TASK 70-23-11-911-013). (3) Install the brackets to the three front links
(a) Increase the temperature of the free end of the right hand link to 250 deg.F (121 deg.C) maximum. Use a GUN - HOT AIR.
(b) Lubricate the pin with
(c) Install the pin in to the hole of the front bracket.
(d) Align the hole on the pin flange with the hole of the bracket. Safety the pin with the bolt.
(e) Put the pin with the bracket through the hole of the spherical bearing of the link.
(f) Install the rear bracket on the free end of the pin.
(g) Keep all the parts together until the link gets to room temperature.
(h) Do the subsequent operations if the installation of the pin is not easy by hand
1 Install the hexagonal head screw of the IAE1F10012 PUSHER, INSTALLATION, through the pin and the rear bracket.
2 Install the nut on the free end of the hexagonal head screw. Turn the nut until it touches the rear bracket.
3 Hold the hexagonal head screw. Turn the hexagonal nut clockwise until the pin is fully installed. Use a standard wrench.
4 Let the link get to room temperature. Remove the pusher from the pin.
(i) Do the step (1) thru (8) for the installation of the brackets on the left hand link and on the center link.
(4) Install the brackets on the rear link
(a) Increase the temperature of the free end of the rear link to 250 deg.F (121 deg.C) maximum. Use a GUN - HOT AIR.
(b) Lubricate the pin with
(c) Install the pin through the hole of the spherical bearing of the link. Push until the pin protrudes equally from each side of the spherical bearing.
(d) Install the two brackets on the two ends of the pin.
(e) Safety the brackets with the two bolts, washers and nuts. Tighten the bolts by hand.
(f) Let the link get to room temperature.
(g) Remove the two bolts, washers and nuts from the brackets.
E. Remove the Crank Cover from the External Gearbox
(1) Remove the two nuts (4) and the washers (3) from the crank cover (2).
(2) Remove the crank cover (2) from the front of the external gearbox.
(3) Remove and discard the packing (1).
Subtask 72-60-00-420-073-A ** ON A/C NOT FOR ALL (1) Remove the two nuts (4) and the washers (3) from the crank cover (2).
(2) Remove the crank cover (2) from the front of the external gearbox.
(3) Remove and discard the packing (1).
F. Install the Seal Ring on the PTO Shaft
(1) Lubricate the mating diameter of the angle gearbox casing withV10-077 lubricant (engine oil)
(2) Lubricate the seal ring withV10-077 lubricant (engine oil)
(3) Install the seal ring on the PTO shaft seal tube (Ref. AMM TASK 70-23-13-911-010).
Subtask 72-60-00-480-055-A ** ON A/C NOT FOR ALL (1) Lubricate the mating diameter of the angle gearbox casing with
(2) Lubricate the seal ring with
(3) Install the seal ring on the PTO shaft seal tube (Ref. AMM TASK 70-23-13-911-010).
G. Install the External Gearbox to the Support Equipment
(2) Move the hydraulic jack below the external gearbox.
(3) Align the pin on the hydraulic jack plate with the bore on the gearbox adapter.
(4) Operate the hydraulic pump to lift the hydraulic jack. Remove the external gearbox from the storage stand.
(5) Make sure the adjustable support of the hydraulic jack is in the lowered position.
4. ProcedureNOTE: The external gearbox is installed on the IAE1F10021 STAND, STORAGE, with the IAE1F10023 ADAPTER, HANDLING, and the IAE1F10011 PIN, HANDLING.
(1) If necessary, install the IAE1F10026 PUMP-HYDRAULIC on the IAE1F10022 JACK, HYDRAULIC, and connect the hose. (2) Move the hydraulic jack below the external gearbox.
(3) Align the pin on the hydraulic jack plate with the bore on the gearbox adapter.
(4) Operate the hydraulic pump to lift the hydraulic jack. Remove the external gearbox from the storage stand.
(5) Make sure the adjustable support of the hydraulic jack is in the lowered position.
Subtask 72-60-00-820-051-A ** ON A/C NOT FOR ALL
A. Align the External Gearbox for Installation to the Engine
(1) Carefully move the external gearbox below the engine.
(2) Lift the IAE1F10022 JACK, HYDRAULIC (4), until the external gearbox is at about 2.75 in. (69.85 mm) from the intermediate case.
(3) Align the external gearbox with the intermediate case of the engine.
(4) Turn clockwise the knob on the front of the hydraulic jack base to prevent any accidental lowering of the hydraulic jack.
Subtask 72-60-00-420-072-A ** ON A/C NOT FOR ALL (1) Carefully move the external gearbox below the engine.
(2) Lift the IAE1F10022 JACK, HYDRAULIC (4), until the external gearbox is at about 2.75 in. (69.85 mm) from the intermediate case.
(3) Align the external gearbox with the intermediate case of the engine.
(4) Turn clockwise the knob on the front of the hydraulic jack base to prevent any accidental lowering of the hydraulic jack.
B. Installation of the External Gearbox to the Engine
(1) Attach the front center link to the intermediate case flange
(a) Hold the link in vertical position.
(b) Turn clockwise the handwheel adjacent to the adjustable support of the IAE1F10022 JACK, HYDRAULIC (4). Lift the external gearbox until the holes on the brackets are aligned with the holes on the intermediate case flange.
(c) Install the two bolts, washers and nuts which attach the brackets to the intermediate case flange.
(d) TORQUE the nuts to between 370 and 270 lbf.in (4.18 and 3.05 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
(2) Move the external gearbox in position
(b) Engage the radial gearshaft of the angle gearbox with the PTO shaft on the intermediate structure.
(c) If necessary, turn the starter idler gear (5) on the front of the gearbox to make this operation easier. Use a standard wrench.
(d) Engage the angle geabox:
(3) Attach the right hand link to the intermediate case flange
(a) Align the holes on the brackets with the holes on the intermediate case flange.
(b) Install the two bolts, washers and nuts which attach the brackets to the intermediate case flange.
(c) TORQUE the nuts to between 370 and 270 lbf.in (4.18 and 3.05 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
(d) Remove the bolts which attach the two pins of the link.
(e) Install the bonding strap and align the holes with the holes on the pin flanges.
(f) Install the bolts again. TORQUE to between 95 and 85 lbf.in (1.07 and 0.96 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
(4) Attach the left hand link to the intermediate case flange
(a) Align the holes on the brackets with the holes on the intermediate case flange.
(b) Install the two bolts, washers and nuts which attach the brackets to the intermediate case flange.
(c) TORQUE the nuts to between 370 and 270 lbf.in (4.18 and 3.05 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
(d) Remove the bolts which attach the two pins of the link.
(e) Install the bonding strap and align the holes with the holes on the pin flanges.
(f) Install the bolts again. TORQUE to between 95 and 85 lbf.in (1.07 and 0.96 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
(5) Attach the rear link to the intermediate case flange
(a) Align the holes on the brackets with the holes on the intermediate case flange.
(b) Install the two bolts, washers and nuts which attach the brackets to the intermediate case flange.
(c) TORQUE the bolts to between 220 and 180 lbf.in (2.49 and 2.03 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
Subtask 72-60-00-080-051-A ** ON A/C NOT FOR ALL (1) Attach the front center link to the intermediate case flange
(a) Hold the link in vertical position.
(b) Turn clockwise the handwheel adjacent to the adjustable support of the IAE1F10022 JACK, HYDRAULIC (4). Lift the external gearbox until the holes on the brackets are aligned with the holes on the intermediate case flange.
(c) Install the two bolts, washers and nuts which attach the brackets to the intermediate case flange.
(d) TORQUE the nuts to between 370 and 270 lbf.in (4.18 and 3.05 m.daN )
(Ref. AMM TASK 70-23-11-911-013). (2) Move the external gearbox in position
NOTE: Operate the two handwheels (one installed on the hydraulic jack base and the other below the hydraulic jack plate) to adjust the position of the external gearbox.
(a) Lift the external gearbox and move the front center link to the horizontal position. (b) Engage the radial gearshaft of the angle gearbox with the PTO shaft on the intermediate structure.
(c) If necessary, turn the starter idler gear (5) on the front of the gearbox to make this operation easier. Use a standard wrench.
(d) Engage the angle geabox:
CAUTION:
DO NOT DAMAGE THE RING ON THE PTO SHAFT SEAL TUBE.
1 Engage the angle gearbox with the PTO shaft seal tube. (3) Attach the right hand link to the intermediate case flange
(a) Align the holes on the brackets with the holes on the intermediate case flange.
(b) Install the two bolts, washers and nuts which attach the brackets to the intermediate case flange.
(c) TORQUE the nuts to between 370 and 270 lbf.in (4.18 and 3.05 m.daN )
(Ref. AMM TASK 70-23-11-911-013). (d) Remove the bolts which attach the two pins of the link.
(e) Install the bonding strap and align the holes with the holes on the pin flanges.
(f) Install the bolts again. TORQUE to between 95 and 85 lbf.in (1.07 and 0.96 m.daN )
(Ref. AMM TASK 70-23-11-911-013). (4) Attach the left hand link to the intermediate case flange
(a) Align the holes on the brackets with the holes on the intermediate case flange.
(b) Install the two bolts, washers and nuts which attach the brackets to the intermediate case flange.
(c) TORQUE the nuts to between 370 and 270 lbf.in (4.18 and 3.05 m.daN )
(Ref. AMM TASK 70-23-11-911-013). (d) Remove the bolts which attach the two pins of the link.
(e) Install the bonding strap and align the holes with the holes on the pin flanges.
(f) Install the bolts again. TORQUE to between 95 and 85 lbf.in (1.07 and 0.96 m.daN )
(Ref. AMM TASK 70-23-11-911-013). (5) Attach the rear link to the intermediate case flange
(a) Align the holes on the brackets with the holes on the intermediate case flange.
(b) Install the two bolts, washers and nuts which attach the brackets to the intermediate case flange.
(c) TORQUE the bolts to between 220 and 180 lbf.in (2.49 and 2.03 m.daN )
(Ref. AMM TASK 70-23-11-911-013). C. Remove the External Gearbox Support Tool
(1) Remove the two safety pins (6) from the handling pin.
(2) Loosen the knobs (9) and disconnect the two locking rods (8) from the bosses (11) on the angle gearbox (7).
(3) Turn counterclockwise the handwheel adjacent to the adjustable support of the hydraulic jack. Lower the hydraulic jack plate and disengage the IAE1F10023 ADAPTER, HANDLING (2), from the IAE1F10011 PIN, HANDLING (4).
(4) Turn counterclockwise the knob on the front of the hydraulic jack base and lower the IAE1F10022 JACK, HYDRAULIC (3).
(5) Remove the two IAE1F10011 PIN, HANDLING (4), from the ground handling bosses on the bottom of the external gearbox.
(6) Install the IAE1F10011 PIN, HANDLING (4), on the IAE1F10023 ADAPTER, HANDLING (2). Safety with the safety pins (6).
(7) Move the hydraulic jack away from the engine.
Subtask 72-60-00-410-062-A ** ON A/C NOT FOR ALL (1) Remove the two safety pins (6) from the handling pin.
(2) Loosen the knobs (9) and disconnect the two locking rods (8) from the bosses (11) on the angle gearbox (7).
(3) Turn counterclockwise the handwheel adjacent to the adjustable support of the hydraulic jack. Lower the hydraulic jack plate and disengage the IAE1F10023 ADAPTER, HANDLING (2), from the IAE1F10011 PIN, HANDLING (4).
(4) Turn counterclockwise the knob on the front of the hydraulic jack base and lower the IAE1F10022 JACK, HYDRAULIC (3).
(5) Remove the two IAE1F10011 PIN, HANDLING (4), from the ground handling bosses on the bottom of the external gearbox.
(6) Install the IAE1F10011 PIN, HANDLING (4), on the IAE1F10023 ADAPTER, HANDLING (2). Safety with the safety pins (6).
(7) Move the hydraulic jack away from the engine.
D. Install the Crank Cover (2) on the External Gearbox
(1) Lubricate the packing (1) withV10-077 lubricant (engine oil)
(2) Install the packing (1) on the crank cover (2) (Ref. AMM TASK 70-23-13-911-010).
(3) Install the crank cover (2) on the front of the external gearbox.
(4) Align the holes on the crank cover (2) with the studs on the gearbox.
(5) Install the two washers (3) and the two nuts (4) which attach the crank cover (2) to the gearbox.
(6) TORQUE the nuts (4) to between 95 and 85 lbf.in (1.07 and 0.96 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
Subtask 72-60-00-410-063-A ** ON A/C NOT FOR ALL (1) Lubricate the packing (1) with
(2) Install the packing (1) on the crank cover (2) (Ref. AMM TASK 70-23-13-911-010).
(3) Install the crank cover (2) on the front of the external gearbox.
(4) Align the holes on the crank cover (2) with the studs on the gearbox.
(5) Install the two washers (3) and the two nuts (4) which attach the crank cover (2) to the gearbox.
(6) TORQUE the nuts (4) to between 95 and 85 lbf.in (1.07 and 0.96 m.daN )
(Ref. AMM TASK 70-23-11-911-013). E. Install the related parts and the light duty electrical harness to the module where necessary (Ref. AMM TASK 72-60-00-400-011).
Subtask 72-60-00-869-058-A ** ON A/C NOT FOR ALL F. Make sure the pressure oil filter element is installed on the external gearbox (Ref. AMM TASK 79-21-44-000-010) and (Ref. AMM TASK 79-21-44-400-010).
Subtask 72-60-00-869-059-A ** ON A/C NOT FOR ALL G. Make sure the scavenge oil filter element is installed on the external gearbox (Ref. AMM TASK 79-22-44-000-010) and (Ref. AMM TASK 79-22-44-400-010).
5. Close-upSubtask 72-60-00-410-064-A ** ON A/C NOT FOR ALL
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(3) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(4) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 72-60-00-612-053-A ** ON A/C NOT FOR ALL Subtask 72-60-00-942-055-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(3) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(4) FOR [1000EM2] (ENGINE-2)
447AL 448AR
C. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the WARNING NOTICE(S).
Subtask 72-60-00-710-053-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the WARNING NOTICE(S).