Installation of the Mount Tube Stopper [IAE]

TASK 72-32-03-400-001-A
Installation of the Mount Tube Stopper

1. Reason for the Job
This TASK is for V2500-A1 SBE 72-0150 engines and V2500-A5 engines.
There are two methods to remove/install the mount tube stopper.
Method 1 requires removal/installation of the forward mount support with engine removal.
Method 2 requires unloading of the power plant and uses the WRENCH (IAE1J12511) to turn the forward mount support without engine removal.
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	2	WARNING NOTICE(S)
No specific	Torque wrench: range to between 45 and 36 lbf.in (0.51 and 0.41 m.daN )
IAE1J12511	1	WRENCH

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 71-00-20-400-802-A	Reload the Power Plant
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 71-21-11-400-002-A	Installation of the Forward Mount Support
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
Mount Tube Stopper

3. Job Set-up
Subtask 72-32-03-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU:
(a) Make sure that the WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) 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) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE and the MAT - WORK are in position.

Subtask 72-32-03-010-064-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowls 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 doors 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 72-32-03-040-056-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser

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).

4. Procedure
Subtask 72-32-03-420-052-A ** ON A/C NOT FOR ALL

A. Method 1: Install the Stopper on the Fan Frame

Mount Tube Stopper ** ON A/C NOT FOR ALL

(1) Install the stopper (3) with the two screws (2) and nuts (1).
(2) TORQUE the nuts to between 45 and 36 lbf.in (0.51 and 0.41 m.daN )

(Ref. AMM TASK 70-23-11-911-013).

Subtask 72-32-03-420-053-A ** ON A/C NOT FOR ALL

B. Method 1: Install the forward mount support (Ref. AMM TASK 71-21-11-400-002).

Subtask 72-32-03-420-054-A ** ON A/C NOT FOR ALL

C. Method 2 : Install the Mount Tube Stopper to the Fan Assembly

Mount Tube Stopper ** ON A/C NOT FOR ALL

(1) Attach the IAE1J12511 WRENCH to the hexagonal flange of the engine mount.
(2) Turn the front mount tube to one side using the special wrench.
(3) Install the nut(1), screw(2) and stopper(3) to the fan frame assembly.
(4) TORQUE the nuts to between 45 and 36 lbf.in (0.51 and 0.41 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(5) Turn the front mount tube to the other side using the special wrench.
(6) Install the nut(1), screw(2) and stopper(3) to the fan frame assembly.
(7) TORQUE the nuts to between 45 and 36 lbf.in (0.51 and 0.41 m.daN )

(Ref. AMM TASK 70-23-11-911-013).

Subtask 72-32-03-420-055-A ** ON A/C NOT FOR ALL

D. Method 2: Reload the Power Plant (Ref. AMM TASK 71-00-20-400-802).

5. Close-up
Subtask 72-32-03-410-062-A ** ON A/C NOT FOR ALL

A. Remove the Ground Support Equipment
(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 72-32-03-410-063-A ** ON A/C NOT FOR ALL

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 72-32-03-440-056-A ** ON A/C NOT FOR ALL

C. Do the re-activation of the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 72-32-03-410-064-A ** ON A/C NOT FOR ALL

D. Close Access
(1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 12:56:26 UTC