Visual Inspection of the Variable Stator Vane (VSV) Actuator [CFML]

TASK 75-32-05-210-801-A
Visual Inspection of the Variable Stator Vane (VSV) Actuator

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.

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)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 70-70-00-910-804-A	Electrical Standard Practices
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
TASK 75-32-05-000-801-A	Removal of the Right Variable Stator Vane (VSV) Actuator
TASK 75-32-05-000-802-A	Removal of the Left Variable Stator Vane (VSV) Actuator
TASK 75-32-05-400-801-A	Installation of the Right Variable Stator Vane (VSV) Actuator
TASK 75-32-05-400-802-A	Installation of the Left Variable Stator Vane (VSV) Actuator
TASK 78-30-00-040-809-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-809-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
TASK 78-36-00-410-806-A	Closing of the Thrust Reverser Cowl Doors

3. Job Set-up
Subtask 75-32-05-941-056-A

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate:

The ENG/MODE selector switch
The ENG/MASTER 1(2) control switch.

(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 75-32-05-010-064-A

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 1M(3 FT) in position.

Subtask 75-32-05-040-057-A

C. Deactivation of the Thrust Reverser System for Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Do the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-809).

Subtask 75-32-05-010-065-A

D. Get Access
(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR

4. Procedure
Subtask 75-32-05-210-051-A

A. Inspection of the Variable Stator Vane (VSV) Actuator

NOTE: Use of BORESCOPE SET equipment is permitted for detailed inspection of the VSV in the areas with no direct access.

NOTE: Make sure that the work area is clean and clear of any DOD / FOD that would prevent normal operation of the VSV system.

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Fuel leaks on the actuator body and valve shaft	a) A fuel leak that makes drops of fuel is not permitted. b) A fuel stain (wetting) on the actuator body or actuator valve shaft is permitted, if you do not find drops of fuel.	Replace the preformed packings on the head fuel and rod fuel fittings on the VSV actuator (Ref. AMM TASK 75-32-05-000-801) and (Ref. AMM TASK 75-32-05-400-801) (Ref. AMM TASK 75-32-05-000-802) and (Ref. AMM TASK 75-32-05-400-802). or Replace the fuel tube. or Install and tighten the fuel tube B-nuts. or Replace the VSV actuator (Ref. AMM TASK 75-32-05-000-801) and (Ref. AMM TASK 75-32-05-400-801) (Ref. AMM TASK 75-32-05-000-802) and (Ref. AMM TASK 75-32-05-400-802).
2.Loose VSV actuator	Bearings with cracks or damage are not permitted.	Tighten the bolts and nuts or Replace the VSV actuator (Ref. AMM TASK 75-32-05-000-801) and (Ref. AMM TASK 75-32-05-400-801) (Ref. AMM TASK 75-32-05-000-802) and (Ref. AMM TASK 75-32-05-400-802).
3.Cracks and dents on the VSV actuator	Not serviceable.	Replace the VSV actuator (Ref. AMM TASK 75-32-05-000-801) and (Ref. AMM TASK 75-32-05-400-801) (Ref. AMM TASK 75-32-05-000-802) and (Ref. AMM TASK 75-32-05-400-802).
4.Scores on the piston rod of the VSV actuator	Not serviceable.	Replace the VSV actuator (Ref. AMM TASK 75-32-05-000-801) and (Ref. AMM TASK 75-32-05-400-801) (Ref. AMM TASK 75-32-05-000-802) and (Ref. AMM TASK 75-32-05-400-802).
5.Bent VSV actuator piston rod	Not serviceable.	Replace the VSV actuator (Ref. AMM TASK 75-32-05-000-801) and (Ref. AMM TASK 75-32-05-400-801) (Ref. AMM TASK 75-32-05-000-802) and (Ref. AMM TASK 75-32-05-400-802).
6.Leakage or damage to VSV actuator electrical receptacle and the electrical connector	a) Leakage through the electrical connector or signs of wetting around the electrical connector is not permitted. b) Small damage to the VSV actuator electrical receptacle threads is permitted.	Tighten the electrical connector (Ref. AMM TASK 70-70-00-910-804). or Replace the wiring harness. or Repair the damage to electrical receptacle threads. or Replace the VSV actuator (Ref. AMM TASK 75-32-05-000-801) and (Ref. AMM TASK 75-32-05-400-801) (Ref. AMM TASK 75-32-05-000-802) and (Ref. AMM TASK 75-32-05-400-802).

5. Close-up
Subtask 75-32-05-410-056-A

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 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR

Subtask 75-32-05-440-053-A

B. Do the reactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-440-809).

Subtask 75-32-05-410-057-A

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:15:02 UTC