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

TASK 72-32-00-400-802-A
Installation of the Variable-Stator-Vane (VSV) Bellcrank 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.

ZONE: 210
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	WARNING NOTICE(S)
No specific	Torque wrench: range to between 120 and 110 lbf.in (1.36 and 1.24 m.daN )
No specific	Torque wrench: range to between 225 and 215 lbf.in (2.54 and 2.43 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2101)	graphite grease

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
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 71-00-00-710-006-B	Minimum Idle Check
TASK 71-00-00-710-008-B	Power Assurance Check
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 72-31-00-290-002-A	Inspection of the High Pressure Compressor Rotor Assembly
TASK 72-32-00-210-803-A	Check of the HPC Variable-Stator-Vane (VSV) System-Resistance
TASK 73-29-00-710-040-B	Operational Test of the FADEC on the Ground (with Engine Motoring)
TASK 75-32-10-400-002-A	Installation of the Variable Stator Vane (VSV) Actuators
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 Actuator Bellcrank-Assembly

3. Job Set-up
Subtask 72-32-00-941-063-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the WARNING NOTICE(S) is/are 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) Make sure that the WARNING NOTICE(S) is/are in position to tell persons not to energize the FADEC 1(2).

Subtask 72-32-00-861-053-A ** ON A/C NOT FOR ALL

B. Make sure that the aircraft electrical circuits are energized.
(Ref. AMM TASK 24-41-00-861-002).

Subtask 72-32-00-865-057-A ** ON A/C NOT FOR ALL

C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

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 72-32-00-010-079-A ** ON A/C NOT FOR ALL

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

Subtask 72-32-00-010-080-A ** ON A/C NOT FOR ALL

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

Subtask 72-32-00-040-066-A ** ON A/C NOT FOR ALL

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

4. Procedure
Subtask 72-32-00-210-057-A ** ON A/C NOT FOR ALL

A. Check of the VSV System Resistance (force) for Inlet Guide Vane (IGV)
(1) Check the VSV System Resistance (force) for IGV, Stage 1, Stage 2 and Stage 3 (Ref. AMM TASK 72-32-00-210-803).
(2) Remove the engine, if any stage requires more than 100 lb (445 N) force to move the actuation ring.

Subtask 72-32-00-420-058-A ** ON A/C NOT FOR ALL

B. Installation of the VSV Bellcrank Assembly

NOTE: Unless otherwise specified, the following steps can be used to install both VSV Actuator and bellcrank assemblies.

(1) Clean the component interfaces and the adjacent area.
(2) Do a visual inspection of the component interface and/or the adjacent area.
(3) Install the VSV bellcrank assembly as follows:
(a) Apply graphite grease (Material No.CP2101) to the bolts (20), (21), (23) and (25).
(b) Install the mounting sleeve (50) on the head-end side of the assembly. Put the sleeve (50) on the inboard side of the bellcrank mounting boss on the connecting link side. Position the actuation assembly on the mounting boss and align the bolt holes.
(c) Attach the both mounting bosses, on the head-end side of the assembly, with the two washers (30) and the bolts (20) and (21).
(d) Install the mounting sleeve (50) on the rod-end side of the actuator. Put the sleeve (50) on the inboard side of the bellcrank mounting boss on the connecting link side. Position the actuation assembly on the mounting boss and align the bolt holes.
(e) Attach the mounting boss, on the rod-end and connecting link side of the assembly, with the washer (40) and the bolt (23).
(f) Attach the mounting boss, on the rod-end and connecting link side of the assembly, with the mounting spacer (60), washer (40) and bolt (25).
(g) TORQUE the two head-end bolts (20) and (21) to between 120 and 110 lbf.in (1.36 and 1.24 m.daN )

.
(h) TORQUE the two rod-end bolts (23) and (25) to between 225 and 215 lbf.in (2.54 and 2.43 m.daN )

.
(i) Lubricate the threads of the D-head bolts (70) and the nuts (80) with the graphite grease (Material No.CP2101) .
(j) Install the rod-ends of the connecting links to the actuation ring clevises and secure with the D-head bolts (70) and the nuts (80).

NOTE: The bolt head goes aft for IGV and forward for Stages 1, 2 and 3.

(k) TORQUE the nuts (80) to between 120 and 110 lbf.in (1.36 and 1.24 m.daN )

Subtask 72-32-00-420-057-A ** ON A/C NOT FOR ALL

C. Installation of the VSV Actuator
(1) Install the VSV Actuator (Ref. AMM TASK 75-32-10-400-002).

5. Close-up
Subtask 72-32-00-410-072-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.

Subtask 72-32-00-440-062-A ** ON A/C NOT FOR ALL

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

Subtask 72-32-00-410-073-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 72-32-00-865-058-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 72-32-00-862-052-A ** ON A/C NOT FOR ALL

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

Subtask 72-32-00-790-050-A ** ON A/C NOT FOR ALL

F. Test Requirements
(1) Perform manual operation of the VSV actuation (Ref. AMM TASK 72-31-00-290-002).
(2) Perform the VSV Actuator leak test (Ref. AMM TASK 75-32-10-400-002).
(3) Perform the FADEC ground rest (engine motoring) (Ref. AMM TASK 73-29-00-710-040).
(4) Perform minimum idle leak check (Ref. AMM TASK 71-00-00-710-006) to ensure that on the CFDS no fault is shown related to the VSV system.
(5) Perform the Power Assurance test (Ref. AMM TASK 71-00-00-710-008).

[Rev.10 from 2021] 2026.04.01 13:00:06 UTC