DOC AIRBUS | AMM A320FRemoval of the Forward Mount Support [IAE]
TASK 71-21-11-000-002-A
Removal of the Forward Mount Support
1. Reason for the Job
This task is for V2500-A1 and V2500-A5 engines.
There are two methods (Method 1 and Method 2) to remove the front engine mount tube and the mount tube outer race assembly.
Method 1 uses the hooking puller (IAE 1J12476 or IAE 1J12516) and the turning handle (IAE 1J12517).
Method 2 uses the sliding hammer (IAE 1J12518) and the removal adapter (IAE 1J12519).
For the Method 1 procedure, refer to steps 4.A thru 4.E.
For the Method 2 procedure, refer to step 4.F.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 71-21-11-941-061-A ** ON A/C NOT FOR ALL
Subtask 71-21-11-020-064-A ** ON A/C NOT FOR ALL Subtask 71-21-11-020-065-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 12:56:26 UTC
Removal of the Forward Mount Support
1. Reason for the Job
This task is for V2500-A1 and V2500-A5 engines.
There are two methods (Method 1 and Method 2) to remove the front engine mount tube and the mount tube outer race assembly.
Method 1 uses the hooking puller (IAE 1J12476 or IAE 1J12516) and the turning handle (IAE 1J12517).
Method 2 uses the sliding hammer (IAE 1J12518) and the removal adapter (IAE 1J12519).
For the Method 1 procedure, refer to steps 4.A thru 4.E.
For the Method 2 procedure, refer to step 4.F.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE |
| No specific | 1 | MAT - WORK |
| No specific | AR | WARNING NOTICE(S) |
| IAE1J12476 | 1 | PULLER HOOKING |
| IAE1J12516 | 1 | PULLER-HOOKING |
| IAE1J12517 | 1 | HANDLE-TURNING |
| IAE1J12518 | 1 | HAMMER SLIDING |
| IAE1J12519 | 1 | ADAPTER REMOVAL |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-010-A | Opening of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 71-21-12-000-011-A | Removal of the Forward Engine Mount |
| TASK 78-30-00-040-012-A | Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance |
| TASK 78-32-00-010-010-A | Opening of the Thrust Reverser Halves |
Removal/Installation of the Front Engine Mount TubeSubtask 71-21-11-941-061-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) in position 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) in position to tell persons not to energize the FADEC 1(2).
Subtask 71-21-11-010-070-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) in position 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) in position to tell persons not to energize the FADEC 1(2).
B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 71-21-11-040-060-A ** ON A/C NOT FOR ALL (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
C. Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU)
Subtask 71-21-11-010-071-A ** ON A/C NOT FOR ALL WARNING:
MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
(1) Do the deactivation of the thrust reverser Hydraulic Control Unit (HCU) (Ref. AMM TASK 78-30-00-040-012). D. Open the Thrust Reverser Halves (Ref. AMM TASK 78-32-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 71-21-11-941-062-A ** ON A/C NOT FOR ALL (1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
E. Installation of Ground Support Equipment
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position to get access to the forward engine mount.
(2) Put the MAT - WORK in position.
4. Procedure(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position to get access to the forward engine mount.
(2) Put the MAT - WORK in position.
Subtask 71-21-11-020-064-A ** ON A/C NOT FOR ALL Subtask 71-21-11-020-065-A ** ON A/C NOT FOR ALL
B. Method 1: Find the Identified Position for Installation of the Hooking Puller
(1) Remove the eight nuts (1) which attach the mount tube outer race assembly to the No. 1 strut of the fan frame.
(2) Find the positions at which the IAE1J12476 PULLER HOOKING or IAE1J12516 PULLER-HOOKING is to be installed on the mount tube outer race assembly and the four studs.
(3) Temporarily put the setting tubes (part of the hooking puller) on the four studs of the fan frame.
(4) If there is not space between the setting tube and the front engine mount tube at location G, go to step 4. C. If there is space, go to step 4. D.
Subtask 71-21-11-020-066-A ** ON A/C NOT FOR ALL (1) Remove the eight nuts (1) which attach the mount tube outer race assembly to the No. 1 strut of the fan frame.
(2) Find the positions at which the IAE1J12476 PULLER HOOKING or IAE1J12516 PULLER-HOOKING is to be installed on the mount tube outer race assembly and the four studs.
(3) Temporarily put the setting tubes (part of the hooking puller) on the four studs of the fan frame.
(4) If there is not space between the setting tube and the front engine mount tube at location G, go to step 4. C. If there is space, go to step 4. D.
NOTE: If there is not space, you can not install the hooking puller on the mount tube race assembly in step 4. D.
C. Method 1: Adjust the Angle of the Front Engine Mount Tube
(1) Install the IAE1J12517 HANDLE-TURNING to the front engine mount tube with the four bolts (part of the turning handle) and tighten the four bolts.
(2) Use the turning handle and turn the front engine mount tube to appropriate angle so that the setting tubes (part of the hooking puller) do not touch the front engine mount tube during installation of the hooking puller on to the engine mount tube outer race.
(3) If you can not turn easily the front engine mount tube, do the procedures for the method 2 in this task.
Subtask 71-21-11-020-067-A ** ON A/C NOT FOR ALL (1) Install the IAE1J12517 HANDLE-TURNING to the front engine mount tube with the four bolts (part of the turning handle) and tighten the four bolts.
(2) Use the turning handle and turn the front engine mount tube to appropriate angle so that the setting tubes (part of the hooking puller) do not touch the front engine mount tube during installation of the hooking puller on to the engine mount tube outer race.
(3) If you can not turn easily the front engine mount tube, do the procedures for the method 2 in this task.
NOTE: The front engine mount tube is removed without adjustment of the angle of the tube in the procedures for the method 2.
D. Method 1: Install the Hooking Puller on the Mount Tube Outer Race Assembly
(1) Prepare the IAE1J12476 PULLER HOOKING or IAE1J12516 PULLER-HOOKING for installation.
(3) Install the hooking puller to the mount tube outer race assembly.
(a) Install the hooking puller at positions given in step 4. A.
(b) Adjust the position of the hooking puller.
(4) Tighten the nuts A and bolts A (part of the hooking puller).
(5) Only for IAE1J12516 PULLER-HOOKING: Install the ring (part of the hooking puller) on four jaws.
Subtask 71-21-11-020-068-A ** ON A/C NOT FOR ALL (1) Prepare the IAE1J12476 PULLER HOOKING or IAE1J12516 PULLER-HOOKING for installation.
NOTE: There are two alternative special tools for removal of the mount tube outer race assembly. IAE1J12516 PULLER-HOOKING has the ring as part of the hooking puller to safety the four jaws. IAE1J12476 PULLER HOOKING does not have the ring.
(2) Lightly tighten the bolts A and nuts A (part of the hooking puller). (3) Install the hooking puller to the mount tube outer race assembly.
(a) Install the hooking puller at positions given in step 4. A.
(b) Adjust the position of the hooking puller.
(4) Tighten the nuts A and bolts A (part of the hooking puller).
(5) Only for IAE1J12516 PULLER-HOOKING: Install the ring (part of the hooking puller) on four jaws.
E. Method 1: Remove the Front Engine Mount Tube and the Mount Tube Outer Race Assembly
(1) Remove the mount tube and the outer race assembly (2).
(a) Install a wrench to the adjusting screw (part of the hooking puller) and turn it clockwise.
(b) If the mount tube and the outer race assembly can move rearward with the hooking puller, go to step (c). If the mount tube and outer race assembly can not be removed from the fan frame with the hooking puller, do the procedures for the method 2 in this task.
(c) Continue to turn the wrench until the mount tube outer race assembly is clear from fan frame.
(2) Remove the hooking puller from mount tube outer race assembly.
Subtask 71-21-11-020-069-A ** ON A/C NOT FOR ALL (1) Remove the mount tube and the outer race assembly (2).
(a) Install a wrench to the adjusting screw (part of the hooking puller) and turn it clockwise.
(b) If the mount tube and the outer race assembly can move rearward with the hooking puller, go to step (c). If the mount tube and outer race assembly can not be removed from the fan frame with the hooking puller, do the procedures for the method 2 in this task.
(c) Continue to turn the wrench until the mount tube outer race assembly is clear from fan frame.
(2) Remove the hooking puller from mount tube outer race assembly.
F. Method 2: Remove the Front Engine Mount Tube and the Mount Tube Outer Race Assembly
(1) Install the IAE1J12519 ADAPTER REMOVAL to the front engine mount tube with four bolts (part of the removal adapter) and tighten the four bolts.
(2) Install the IAE1J12518 HAMMER SLIDING to the removal adapter with the lock pin (part of the sliding hammer).
(3) Move the front engine mount tube and the mount tube outer race assembly.
(a) Move the weight (part of the sliding hammer) rearward quickly to hit the nut (part of the sliding hammer) so that the front engine mount tube becomes free from unwanted friction.
(b) Repeat step (a) until the front engine mount tube can be moved easily by hand.
(4) Remove the sliding hammer and the removal adapter from the front engine mount tube.
(5) Remove the front engine mount tube and the mount tube outer race assembly (2) by hand.
(1) Install the IAE1J12519 ADAPTER REMOVAL to the front engine mount tube with four bolts (part of the removal adapter) and tighten the four bolts.
(2) Install the IAE1J12518 HAMMER SLIDING to the removal adapter with the lock pin (part of the sliding hammer).
(3) Move the front engine mount tube and the mount tube outer race assembly.
(a) Move the weight (part of the sliding hammer) rearward quickly to hit the nut (part of the sliding hammer) so that the front engine mount tube becomes free from unwanted friction.
(b) Repeat step (a) until the front engine mount tube can be moved easily by hand.
(4) Remove the sliding hammer and the removal adapter from the front engine mount tube.
(5) Remove the front engine mount tube and the mount tube outer race assembly (2) by hand.