Removal of the Variable-Stator-Vane (VSV) Bellcrank Assembly [CFMB]

TASK 72-32-00-000-802-A
Removal of the Variable-Stator-Vane (VSV) Bellcrank Assembly

ZONE: 400

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 75-32-10-000-002-A	Removal of the Variable Stator Vane (VSV) Actuators
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
VSV Actuator Bellcrank-Assembly

3. Job Set-up
Subtask 72-32-00-941-062-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Put the WARNING NOTICE(S) in position to tell persons not to start the engine.
(2) Make sure that the engine shutdown occurred five minutes or more before you do this procedure.
(3) On 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 the WARNING NOTICE(S) in position to tell persons not to energize the FADEC 1(2).

Subtask 72-32-00-861-052-A ** ON A/C NOT FOR ALL

B. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 72-32-00-865-056-A ** ON A/C NOT FOR ALL

C. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 1000EM1 (ENGINE1)
49VU	FUEL/LP VALVE/MOT1/ENG1	1QG	A08
121VU	FUEL/LP VALVE/MOT2/ENG1	3QG	M25
FOR FIN: 1000EM2 (ENGINE2)
49VU	FUEL/LP VALVE/MOT1/ENG2	2QG	A09
121VU	FUEL/LP VALVE/MOT2/ENG2	4QG	M26

Subtask 72-32-00-010-077-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Put the ACCESS PLATFORM 1M(3 FT) in position.

Subtask 72-32-00-040-065-A ** ON A/C NOT FOR ALL

E. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 72-32-00-010-078-A ** ON A/C NOT FOR ALL

F. Get Access
(1) Open the thrust-reverser cowl doors (Ref. AMM TASK 78-36-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

4. Procedure
Subtask 72-32-00-020-056-A ** ON A/C NOT FOR ALL

A. Remove the VSV Actuator (Ref. AMM TASK 75-32-10-000-002).

Subtask 72-32-00-020-057-A ** ON A/C NOT FOR ALL

B. Removal of the VSV Bellcrank Assembly
(1) Remove the bolts (70) and the nuts (80) that attach the rod-ends of the connecting links to the actuation ring clevises.
(2) Remove the bolts (20), (21), (23) and (25), washers (30) and (40), mounting sleeve (50) and mounting spacer (60) that attach the VSV bellcrank to the stator case.
(3) Remove the VSV bellcrank assembly from the engine.

NOTE: A check of the High-Pressure-Compressor VSV System-Resistance, as specified in the Installation of the VSV Bellcrank Assembly, is required prior to return to service.

[Rev.10 from 2021] 2026.04.01 02:42:18 UTC