DOC AIRBUS | AMM A320FInstallation of the Forward Mount Support [IAE]
TASK 71-21-11-400-002-A
Installation of the Forward Mount Support
1. Reason for the Job
This task is for V2500-A1 and V2500-A5 engines.
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 71-21-11-860-056-A ** ON A/C NOT FOR ALL
Subtask 71-21-11-420-065-A ** ON A/C NOT FOR ALL
Subtask 71-21-11-410-069-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:30:08 UTC
Installation of the Forward Mount Support
1. Reason for the Job
This task is for V2500-A1 and V2500-A5 engines.
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) |
| No specific | Torque wrench: range to between 370 and 290 lbf.in (4.18 and 3.28 m.daN )  | |
| IAE1J12127 | 1 | HEATER LOCAL |
| IAE6F10027 | 1 | HEATER CONTROL UNIT |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-23-11-911-013-A | General Torque Tightening Techniques |
| 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 71-21-12-400-011-A | Installation 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 78-30-00-440-012-A | Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance |
| TASK 78-32-00-010-010-A | Opening of the Thrust Reverser Halves |
| TASK 78-32-00-410-010-A | Closing of the Thrust Reverser Halves |
Removal/Installation of the Front Engine Mount TubeSubtask 71-21-11-860-056-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:
Subtask 71-21-11-010-072-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. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the thrust reverser halves are open (Ref. AMM TASK 78-32-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 71-21-11-040-061-A ** ON A/C NOT FOR ALL (1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the thrust reverser halves are open (Ref. AMM TASK 78-32-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
C. Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU)
4. ProcedureWARNING:
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) Make sure that the thrust reverser Hydraulic Control Unit (HCU) is deactivated (Ref. AMM TASK 78-30-00-040-012). Subtask 71-21-11-420-065-A ** ON A/C NOT FOR ALL
A. Install the Front Engine Mount Tube and the Mount Tube Outer Race Assembly
(1) Put the IAE1J12127 HEATER LOCAL into the bearing bore and attach it on to the No. 1 strut pad. Attach the heater to one of the eight studs on the pad with the clip of the heater.
(2) Connect the IAE6F10027 HEATER CONTROL UNIT to the local heater.
(3) Increase the temperature to approximately 212 deg. F (100 deg. C).
(4) Freeze the mount tube outer race assembly with dry ice for 30 minutes.
(a) Do this step (4) while doing the step (3).
(5) Installation of the mount tube
(6) Attach the front engine mount tube and the mount tube outer race assembly to the No. 1 strut pad with the eight nuts (1).
(7) TORQUE the nuts to between 370 and 290 lbf.in (4.18 and 3.28 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
Subtask 71-21-11-420-066-A ** ON A/C NOT FOR ALL 5. Close-up(1) Put the IAE1J12127 HEATER LOCAL into the bearing bore and attach it on to the No. 1 strut pad. Attach the heater to one of the eight studs on the pad with the clip of the heater.
(2) Connect the IAE6F10027 HEATER CONTROL UNIT to the local heater.
(3) Increase the temperature to approximately 212 deg. F (100 deg. C).
(4) Freeze the mount tube outer race assembly with dry ice for 30 minutes.
(a) Do this step (4) while doing the step (3).
(5) Installation of the mount tube
WARNING:
DO NOT TOUCH THE HOT SURFACE OF THE LOCAL HEATER.
CAUTION:
HOLD THE TWO HALVES OF THE OUTER RACE ASSEMBLY BY HAND TO KEEP THEM IN POSITION DURING THEIR INSTALLATION.
(a) Remove the heater and install the mount tube and mount tube outer race assembly (2) into the bore as quickly as possible. Make sure that the TOP mark on the mount tube is put at the highest position on the mount tube. (6) Attach the front engine mount tube and the mount tube outer race assembly to the No. 1 strut pad with the eight nuts (1).
(7) TORQUE the nuts to between 370 and 290 lbf.in (4.18 and 3.28 m.daN )
(Ref. AMM TASK 70-23-11-911-013). Subtask 71-21-11-410-069-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) Remove the workmat from the intake cowl.
(3) Remove the access platform(s).
Subtask 71-21-11-410-070-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 workmat from the intake cowl.
(3) Remove the access platform(s).
B. Close the Thrust Reverser Halves (Ref. AMM TASK 78-32-00-410-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 71-21-11-440-056-A ** ON A/C NOT FOR ALL (1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
C. Reactivation of the Thrust Reverser Hydraulic Control Unit (HCU)
(1) Do the re-activation of the thrust reverser Hydraulic Control Unit (HCU) after maintenance (Ref. AMM TASK 78-30-00-440-012).
Subtask 71-21-11-410-071-A ** ON A/C NOT FOR ALL (1) Do the re-activation of the thrust reverser Hydraulic Control Unit (HCU) after maintenance (Ref. AMM TASK 78-30-00-440-012).