Manually Operate the Variable Stator Vane (VSV) Actuator [CFML]

TASK 75-32-05-910-801-A
Manually Operate 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.

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

WARNING: BE CAREFUL NOT TO GET AIRCRAFT FUEL IN YOUR MOUTH OR IN YOUR EYES. IF YOU GET FUEL ON YOUR SKIN OR ON YOUR CLOTHES, FLUSH IT IMMEDIATELY WITH WATER. IF NECESSARY, GET MEDICAL HELP. AIRCRAFT FUEL IS POISONOUS.

1. Reason for the Job
This task gives instructions of how to manually operate the Variable Stator Vane (VSV) system to the open or close position.
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	CONTAINER 5 USGAL (19 L) - FUEL RESISTANT
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 38 and 32 lbf.in (0.43 and 0.36 m.daN )
No specific	Torque wrench: range to between 308 and 262 lbf.in (3.48 and 2.96 m.daN )
856A1084G04	1	ACTUATOR PORTABLE HYDRAULIC
956A1607G02	1	ADAPTER - VSV

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2442)	engine oil
No specific	turbine fuel

C. 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

D. Referenced Information

REFERENCE	DESIGNATION
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 72-24-01-000-801-A	Removal of Segment Shrouds 1 thru 5
TASK 72-24-01-400-801-A	Installation of Segment Shrouds 1 thru 5
TASK 73-29-00-740-802-A	Actuators Test (Menu Mode)
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
Variable Stator Vane (VSV) Actuator

3. Job Set-up
Subtask 75-32-05-941-057-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 75-32-05-010-066-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 75-32-05-040-058-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 75-32-05-010-067-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 75-32-05-910-050-A

A. Manual Operation of the Left and Right VSV Actuators

Variable Stator Vane (VSV) Actuator

(1) Remove segment shroud 4 (Ref. AMM TASK 72-24-01-000-801).
(2) Connect the left VSV actuator (1) to the 956A1607G02 ADAPTER - VSV as follows:
(a) Remove the bolt (5) that attaches the loop clamp (6) and the left VSV hydraulic fuel tube-hose (2) to the support bracket (7).
(b) Remove the bolt (4) that attaches the loop clamp (8) and the left VSV hydraulic fuel tube-hose (2) to the support bracket (7).
(c) Put a CONTAINER 5 USGAL (19 L) - FUEL RESISTANT below the left VSV hydraulic fuel tube-hose (2).
(d) Disconnect the left VSV hydraulic fuel tube-hose (2) from the VBV-VSV hydraulic fuel manifold (3) (two locations).
(e) Let the fuel drain into the CONTAINER 5 USGAL (19 L) - FUEL RESISTANT.
(f) Connect the 956A1607G02 ADAPTER - VSV to the left VSV hydraulic fuel tube-hose (2) as follows:
1 Connect the 956A1607G02 ADAPTER - VSV head left hose fitting to the head end fitting of the left VSV hydraulic fuel tube-hose (2).
2 Connect the 956A1607G02 ADAPTER - VSV rod left hose fitting to the rod end fitting of the left VSV hydraulic fuel tube-hose (2).
3 TORQUE the B-nuts to between 308 and 262 lbf.in (3.48 and 2.96 m.daN )

.
(3) Remove the segment shroud 2 (Ref. AMM TASK 72-24-01-000-801).
(4) Connect the right VSV actuator (9) to the 956A1607G02 ADAPTER - VSV as follows:
(a) Remove the bolt (16) that attaches the loop clamp (12) and the VBV-VSV hydraulic fuel manifold (10) to the support bracket (13).
(b) Remove the bolt (15) that attaches the loop clamp (14) and the VBV-VSV hydraulic fuel manifold (10) to the support bracket (13).
(c) Put a CONTAINER 5 USGAL (19 L) - FUEL RESISTANT below the right VSV hydraulic fuel hose-tube (11).
(d) Disconnect the right VSV hydraulic fuel hose-tube (11) from the VBV-VSV hydraulic fuel manifold (10) (two locations).
(e) Let the fuel drain into the CONTAINER 5 USGAL (19 L) - FUEL RESISTANT.
(f) Connect the 956A1607G02 ADAPTER - VSV to the right VSV hydraulic fuel hose-tube (11) as follows:
1 Connect the 956A1607G02 ADAPTER - VSV head end right hose fitting to the head fitting of the right VSV hydraulic fuel hose-tube (11).
2 Connect the 956A1607G02 ADAPTER - VSV rod right hose fitting to the rod end fitting of the right VSV hydraulic fuel hose-tube (11).
3 TORQUE the B-nuts to between 308 and 262 lbf.in (3.48 and 2.96 m.daN )

.
(5) Connect the 956A1607G02 ADAPTER - VSV to the 856A1084G04 ACTUATOR PORTABLE HYDRAULIC with quick-connect couplings.

NOTE: This task describes the use of the 856A1084G04 ACTUATOR PORTABLE HYDRAULIC to manually operate the VSV. If the 856A1084G04 ACTUATOR PORTABLE HYDRAULIC is not available, you can also use nitrogen as an alternative pressure source. The operating pressure for the nitrogen is the same as the fluid pressures given below.

(6) Make sure that you use clean engine oil (Material No.CP2442) or turbine fuel as the hydraulic fluid for the 856A1084G04 ACTUATOR PORTABLE HYDRAULIC.
(7) Operate the VSV system to the fully open position as follows:

NOTE: The left VSV actuator (1) and the right VSV actuator (9) rods will retract when the VSV system is in the fully closed position.

(a) Operate the 856A1084G04 ACTUATOR PORTABLE HYDRAULIC between 50 and 100 psig (344.7 and 689.5 kPa) to retract the shafts of the VSV actuators.
(b) Make sure that the actuators move smoothly to the fully open position.

NOTE: A bind in the system will cause the pressure reading to increase during actuation.

(8) Operate the VSV system to the fully closed position as follows:

NOTE: The left VSV actuator (1) and the right VSV actuator (9) rods will extend when the VSV system is in the fully closed position.

(a) Operate the 856A1084G04 ACTUATOR PORTABLE HYDRAULIC between 50 and 100 psig (344.7 and 689.5 kPa) to extend the shafts of the VSV actuators.
(b) Make sure that the actuators move smoothly to the fully closed position.

NOTE: A bind in the system will cause the pressure reading to increase during actuation.

(9) Release the hydraulic pressure from the 856A1084G04 ACTUATOR PORTABLE HYDRAULIC, if it is no longer necessary.
(10) Disconnect the left VSV hydraulic fuel tube-hose (2) from the 956A1607G02 ADAPTER - VSV as follows:
(a) Put a CONTAINER 5 USGAL (19 L) - FUEL RESISTANT below the left VSV hydraulic fuel tube-hose (2).
(b) Disconnect the left VSV hydraulic fuel tube-hose (2) from the 956A1607G02 ADAPTER - VSV (two locations).
(c) Let the fluid drain into the CONTAINER 5 USGAL (19 L) - FUEL RESISTANT.
(11) Connect the VBV-VSV hydraulic fuel manifold (3) (two locations) to the left VSV hydraulic fuel tube-hose (2).
(a) TORQUE the B-nuts to between 308 and 262 lbf.in (3.48 and 2.96 m.daN )

.
(12) Apply engine oil (Material No.CP2442) to the threads of the bolt (4) and bolt (5).
(13) Install the bolt (4) that attaches the loop clamp (8) and the left VSV hydraulic fuel tube-hose (2) to the support bracket (7) and tighten with your hand.
(14) Install the bolt (5) that attaches the loop clamp (6) and the left VSV hydraulic fuel tube-hose (2) to the support bracket (7) and tighten with your hand.
(15) TORQUE the bolt (4) and the bolt (5) to between 38 and 32 lbf.in (0.43 and 0.36 m.daN )

.
(16) Disconnect the right VSV hydraulic fuel tube-hose (11) from the 956A1607G02 ADAPTER - VSV as follows:
(a) Put a CONTAINER 5 USGAL (19 L) - FUEL RESISTANT below the right VSV hydraulic fuel tube-hose (11).
(b) Disconnect the right VSV hydraulic fuel tube-hose (11) from the 956A1607G02 ADAPTER - VSV (two location).
(c) Let the fluid drain into the CONTAINER 5 USGAL (19 L) - FUEL RESISTANT.
(17) Connect the VBV-VSV hydraulic fuel manifold (10) (two locations) to the right VSV hydraulic fuel tube-hose (11).
(a) TORQUE the B-nuts to between 308 and 262 lbf.in (3.48 and 2.96 m.daN )

.
(18) Apply engine oil (Material No.CP2442) to the threads of the bolt (15) and bolt (16).
(19) Install the bolt (15) that attaches the loop clamp (14) and the VBV-VSV hydraulic fuel manifold (10) to the support bracket (13) and tighten with your hand.
(20) Install the bolt (16) that attaches the loop clamp (12) and the VBV-VSV hydraulic fuel manifold (10) to the support bracket (13) and tighten with your hand.
(21) TORQUE the bolt (15) and bolt (16) to between 38 and 32 lbf.in (0.43 and 0.36 m.daN )

.
(22) Remove the 956A1607G02 ADAPTER - VSV from 856A1084G04 ACTUATOR PORTABLE HYDRAULIC.
(23) Install the segment shroud 2 (Ref. AMM TASK 72-24-01-400-801).
(24) Install the segment shroud 4 (Ref. AMM TASK 72-24-01-400-801).

5. Close-up
Subtask 75-32-05-410-058-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 75-32-05-440-054-A

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

Subtask 75-32-05-410-059-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).

Subtask 75-32-05-740-050-A

D. Do an actuator test (menu mode) (Ref. AMM TASK 73-29-00-740-802) and a check for leaks.

[Rev.10 from 2021] 2026.04.01 03:14:56 UTC