Check of the HPC Variable-Stator-Vane (VSV) System-Resistance [CFMB]

TASK 72-32-00-210-803-A
Check of the HPC Variable-Stator-Vane (VSV) System-Resistance

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

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	1	DYNAMOMETER 200 DAN (449 LBF)-PULL
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 115 and 105 lbf.in (1.30 and 1.19 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2101)	graphite grease

C. 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

D. 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 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 78-30-00-081-041-B	Make the Thrust Reverser Serviceable after Maintenance
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
TASK 78-36-00-410-040-B	Closing of the Thrust Reverser Doors
VSV System Resistance Check

3. Job Set-up
Subtask 72-32-00-941-061-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 ENG/FADEC GND PWR/1(2) pushbutton switch is OFF.
(b) Put the WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 72-32-00-861-051-A ** ON A/C NOT FOR ALL

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

Subtask 72-32-00-865-054-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 72-32-00-010-075-A ** ON A/C NOT FOR ALL

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

Subtask 72-32-00-040-064-A ** ON A/C NOT FOR ALL

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

Subtask 72-32-00-010-076-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 72-32-00-020-055-A ** ON A/C NOT FOR ALL

A. Disconnect the bellcrank tie-rods from the actuation ring clevises:
(1) On each VSV stage, remove the D-head bolts (70) and self-locking nuts (80) that attach the tie-rods to the actuation rings on the left and right sides.

Subtask 72-32-00-210-056-A ** ON A/C NOT FOR ALL

B. Perform a VSV resistance (force) check for Inlet Guide-Vane (IGV) stage 1, stage 2 and stage 3 that follows:
(1) For each VSV stage, attach the DYNAMOMETER 200 DAN (449 LBF)-PULL to the clevis of each actuation ring and pull the actuation ring to rotate the stage from full open to full closed and then back to full open.
(2) Record the value for each direction (open and closed) for each VSV stage.

Subtask 72-32-00-420-056-A ** ON A/C NOT FOR ALL

C. Connect the bellcrank tie-rods to the actuation ring clevises.

WARNING: REFER TO THE PRODUCT LABEL AND THE MANUFACTURER'S (MATERIAL) SAFETY DATA SHEET (SDS) FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND CORRECT USE OF CONSUMABLE PRODUCTS.

(1) Lubricate the threads of the D-head bolts (70) with a graphite grease (Material No.CP2101) .
(2) Connect the tie-rods to the clevises on the actuation rings with the D-head bolts (70) and the self-locking nuts (80).

NOTE: The D-head bolts (70) point aft for the IGV and forward for stages 1, 2 and 3.

(3) TORQUE the self-locking nuts (80) to between 115 and 105 lbf.in (1.30 and 1.19 m.daN )

5. Close-up
Subtask 72-32-00-410-070-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 cowl-doors: (Ref. AMM TASK 78-36-00-410-040).
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
(3) Remove the access platform(s).

Subtask 72-32-00-440-061-A ** ON A/C NOT FOR ALL

B. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041).

Subtask 72-32-00-410-071-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors: (Ref. AMM TASK 71-13-00-410-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).

Subtask 72-32-00-865-055-A ** ON A/C NOT FOR ALL

D. Remove the safety clip(s) and the tag(s) and close 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 72-32-00-862-051-A ** ON A/C NOT FOR ALL

E. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 02:42:22 UTC