DOC AIRBUS | AMM A320FRemoval of the VSV System Crankshaft Assembly [IAE]
TASK 75-32-42-000-012-B-01
Removal of the VSV System Crankshaft Assembly
This task is for A5 engines only, which have SBE 72-0564 incorporated. This task gives the data for the removal of the VSV system crankshaft.
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 75-32-42-941-072-A ** ON A/C NOT FOR ALL
Subtask 75-32-42-820-068-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:12:11 UTC
Removal of the VSV System Crankshaft Assembly
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobThis task is for A5 engines only, which have SBE 72-0564 incorporated. This task gives the data for the removal 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) |
| IAE1R18254 | 1 | PIN RIGGING |
| IAE1R18891 | 1 | PIN, RIGGING |
| IAE1R18892 | 1 | PIN, RIGGING |
| IAE1R18893 | 1 | PIN, RIGGING |
| IAE1R18895 | 1 | PIN, RIGGING |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.V01-076) | Methyl Ethyl Ketone, Technical grade |
| (Material No.V01-124) | Isopropyl Alcohol, Technical grade |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 451AL, 452AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-010-A | Opening of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 75-32-42-000-011-B | Removal of the VSV System Control Rods |
| TASK 75-32-42-000-011-B-01 | Removal 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 78-32-00-010-010-A | Opening of the Thrust Reverser Halves |
VSV System Control RodsSubtask 75-32-42-941-072-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) 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) to tell persons not to energize the FADEC 1(2).
Subtask 75-32-42-010-104-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) 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) to tell persons not to energize the FADEC 1(2).
B. Open the Fan Cowls (Ref. AMM TASK 71-13-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
Subtask 75-32-42-040-079-A ** ON A/C NOT FOR ALL (1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
C. Deactivate the Thrust Reverser
Subtask 75-32-42-010-105-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) Deactivate 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 [1000EM2] (ENGINE-2)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
4. Procedure(1) FOR [1000EM2] (ENGINE-2)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
Subtask 75-32-42-820-068-A ** ON A/C NOT FOR ALL
A. Install the Rig Pins
(1) Use an applicable wrench, on the wrench flats of the crankshaft, to turn the VSV system linkage to the high speed position.
(2) Install the IAE1R18891 PIN, RIGGING, into the actuator ram.
(3) Install the IAE1R18254 PIN RIGGING, through the rig pin hole in the front bearing housing and the crankshaft.
(4) Install a IAE1R18892 PIN, RIGGING or IAE1R18893 PIN, RIGGING or IAE1R18893 PIN, RIGGING or IAE1R18895 PIN, RIGGING, into each of the four unison rings.
(5) Make sure that each rig pin engages with the applicable hole in the compressor case.
Subtask 75-32-42-020-068-A ** ON A/C NOT FOR ALL (1) Use an applicable wrench, on the wrench flats of the crankshaft, to turn the VSV system linkage to the high speed position.
(2) Install the IAE1R18891 PIN, RIGGING, into the actuator ram.
(3) Install the IAE1R18254 PIN RIGGING, through the rig pin hole in the front bearing housing and the crankshaft.
(4) Install a IAE1R18892 PIN, RIGGING or IAE1R18893 PIN, RIGGING or IAE1R18893 PIN, RIGGING or IAE1R18895 PIN, RIGGING, into each of the four unison rings.
(5) Make sure that each rig pin engages with the applicable hole in the compressor case.
B. Disconnect All the Control Rods from the Crankshaft (Ref. AMM TASK 75-32-42-000-011)
(1) Remove the crankshaft assembly
(a) Remove the four bolts (1) that attach the crankshaft assembly (3) to the compressor case.
(b) Move the bracket (2) clear of the crankshaft assembly (3).
(c) Remove the crankshaft assembly (3).
Subtask 75-32-42-820-069-A ** ON A/C NOT FOR ALL (1) Remove the crankshaft assembly
(a) Remove the four bolts (1) that attach the crankshaft assembly (3) to the compressor case.
(b) Move the bracket (2) clear of the crankshaft assembly (3).
(c) Remove the crankshaft assembly (3).
C. Remove the IAE1R18254 PIN RIGGING, from the Crankshaft Assembly
(2) Cleaning the surface
(a) Use a Textile-Lint free Cotton - (Material No.14SBA1) moistened with theV01-076 Methyl Ethyl Ketone, Technical grade V01-124 Isopropyl Alcohol, Technical grade
(3) Allow sufficient time for the solvent to evaporate and the component to dry before assembly.
NOTE: The following procedure should only be adopted when evidence of a black sticky substance on the VSV crankshaft bearing exists.
(1) Remove the bearings from the crankshaft. (2) Cleaning the surface
(a) Use a Textile-Lint free Cotton - (Material No.14SBA1) moistened with the
(3) Allow sufficient time for the solvent to evaporate and the component to dry before assembly.