Installation of the VSV System Crankshaft Assembly [IAE]

TASK 75-32-42-400-012-B-01
Installation of the VSV System Crankshaft Assembly

1. Reason for the Job
This task is for A5 engines only, which have SBE 72-0564 incorporated. This task gives the data for the installation of the VSV system crankshaft.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 220 and 180 lbf.in (2.49 and 2.03 m.daN )
IAE1R18254	1	PIN RIGGING
IAE1R18891	1	PIN, RIGGING
IAE1R18892	1	PIN, RIGGING
IAE1R18893	1	PIN, RIGGING
IAE1R18894	1	PIN, RIGGING
IAE1R18895	1	PIN, RIGGING

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 71-13-00-010-010-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 75-32-42-400-011-B	Installation of the VSV System Control Rods
TASK 75-32-42-400-011-B-01	Installation of the VSV System Control Rods
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
VSV System Control Rods
VSV System Crankshaft Assembly

3. Job Set-up
Subtask 75-32-42-860-060-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 75-32-42-010-106-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 75-32-42-040-080-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) Make sure that the thrust reverser Hydraulic Control Unit (HCU) is deactivated (Ref. AMM TASK 78-30-00-040-012).

Subtask 75-32-42-820-070-A ** ON A/C NOT FOR ALL

D. Install the Rig Pins

VSV System Control Rods ** ON A/C NOT FOR ALL

(1) Make sure that the IAE1R18891 PIN, RIGGING, is still in position in the actuator ram.
(2) Make sure that the IAE1R18892 PIN, RIGGING or IAE1R18893 PIN, RIGGING or IAE1R18894 PIN, RIGGING or IAE1R18895 PIN, RIGGING, are still in position, one in each unison ring.
(3) Install the IAE1R18254 PIN RIGGING, into the crankshaft assembly so that the pin goes through the rig pin hole in the front bearing housing and the crankshaft.

4. Procedure
Subtask 75-32-42-420-068-A ** ON A/C NOT FOR ALL

A. Install the Crankshaft Assembly

VSV System Control Rods ** ON A/C NOT FOR ALL

VSV System Crankshaft Assembly ** ON A/C NOT FOR ALL

(1) Install the rear bearing housing on the crankshaft.
(2) Put the crankshaft assembly (3) into position on the compressor case.
(3) Put the bracket (2) into position on the upper forward mounting foot of the crankshaft assembly (3).
(4) Install the four bolts (1).
(5) TORQUE the four bolts (1) to between 220 and 180 lbf.in (2.49 and 2.03 m.daN )

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

Subtask 75-32-42-420-069-A ** ON A/C NOT FOR ALL

B. Connect the control rods to the crankshaft (Ref. AMM TASK 75-32-42-400-011).

Subtask 75-32-42-820-071-A ** ON A/C NOT FOR ALL

C. Remove the Rig Pins

CAUTION: YOU MUST MAKE SURE THAT ALL THE RIG PINS ARE REMOVED BEFORE THE ENGINE IS OPERATED. THE VSV MECHANISM WILL BE DAMAGED IF THE PINS ARE NOT REMOVED AND THE ENGINE IS OPERATED.

(1) Remove all the rig pins from the unison rings, the crankshaft and the actuator ram.

VSV System Control Rods ** ON A/C NOT FOR ALL

5. Close-up
Subtask 75-32-42-410-101-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 thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

Subtask 75-32-42-440-067-A ** ON A/C NOT FOR ALL

B. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 75-32-42-410-102-A ** ON A/C NOT FOR ALL

C. 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 03:12:14 UTC