Removal of the Low Pressure Compressor (LPC) Stator Vane Actuator (SVA) [PW11]

TASK 75-31-01-000-801-A
Removal of the Low Pressure Compressor (LPC) Stator Vane Actuator (SVA)

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

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

ZONE: 400
FIN: 4054KS ** ON A/C NOT FOR ALL

1. Reason for the Job
Use this procedure to remove the Low Pressure Compressor (LPC) Stator Vane Actuator (SVA).
For more information about the actuator, refer to (75-00-00-00U).
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	CONTAINER 20L (5 USGAL)
No specific	AR	COVER - PROTECTION
No specific	1	PLIERS - JAWED, SOFT
No specific	1	STEPLADDER 0.5 M (1.6 FT)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.P05-005)	lint-free cotton cloth

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-860-832-A	Procedure to Prevent Engine Motoring and to Stop the Electrical Supply to the EEC
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 72-21-08-000-801-A	Removal of the Fan Exit Liner Segments
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
Low Pressure Compressor (LPC) Stator Vane Actuator (SVA) (Insulation Blanket) (Config 1)
Low Pressure Compressor (LPC) Stator Vane Actuator (SVA) (Disconnect the Harnesses (W03) and (W04) and the Tubes (CP02) and (CR02))
Low Pressure Compressor (LPC) Stator Vane Actuator (SVA) (Remove the Actuator and Disconnect the Tube (DR01))
Low Pressure Compressor (LPC) Stator Vane Actuator (SVA) (Insulation Blanket) (Config 2)

3. Job Set-up
Subtask 75-31-01-941-050-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Do the procedure to prevent engine motoring and to stop the electrical supply to the Electronic Engine Control (EEC)
(Ref. AMM TASK 71-00-00-860-832)

Subtask 75-31-01-010-050-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Put an STEPLADDER 0.5 M (1.6 FT) in position.

Subtask 75-31-01-040-050-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser 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 maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 75-31-01-010-051-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the left thrust-reverser cowl-doors (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL

4. Procedure

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

Subtask 75-31-01-020-051-A ** ON A/C NOT FOR ALL

A. Removal of the Low Pressure Compressor (LPC) Stator Vane Actuator (SVA)

PRE SB C-75-00-013 (Config-1: Initial Design Configuration)

(1) Find the LPC SVA (1) attached to the Compressor Intermediate Case (CIC) bulkhead at the 9 o'clock position.

Low Pressure Compressor (LPC) Stator Vane Actuator (SVA) (Insulation Blanket) (Config 1) ** ON A/C NOT FOR ALL

END OF PRE SB C-75-00-013

POST SB C-75-00-013 (Config-2: Case Assembly Durability Improvement Configuration)
(2) Find the LPC SVA (1) attached to the CIC bulkhead at the 9 o'clock position.

Low Pressure Compressor (LPC) Stator Vane Actuator (SVA) (Insulation Blanket) (Config 2) ** ON A/C NOT FOR ALL

END OF POST SB C-75-00-013

(3) Remove the insulation blanket (2) from the LPC SVA (1).
(4) Remove the fan exit liner segment forward of the LPC SVA (1) (Ref. AMM TASK 72-21-08-000-801).
(5) Remove the LPC SVA (1) as follows:

Low Pressure Compressor (LPC) Stator Vane Actuator (SVA) (Disconnect the Harnesses (W03) and (W04) and the Tubes (CP02) and (CR02)) ** ON A/C NOT FOR ALL

Low Pressure Compressor (LPC) Stator Vane Actuator (SVA) (Remove the Actuator and Disconnect the Tube (DR01)) ** ON A/C NOT FOR ALL

(a) Remove the nut (12) and bolt (13) that attach the LPC SVA link to the actuator (1).
(b) Disconnect the wiring harness (W04) connector (P19) from the actuator (1) with PLIERS - JAWED, SOFT.
(c) Disconnect the wiring harness (W03) connector (P18) from the actuator (1) with PLIERS - JAWED, SOFT.
(d) Put the CONTAINER 20L (5 USGAL) under the actuator (1).
(e) Put the lint-free cotton cloth (Material No.P05-005) under the actuator (1).
(f) Wrap a piece of tape around the drain tube (DR01) below the B-nut connection to the actuator (1).

NOTE: The tape will prevent the B-nut from sliding down to the opposite end of the drain tube where it would be difficult to reach during installation of the actuator (1).

(g) Disconnect the tubes.

CAUTION: USE A SECOND WRENCH TO HOLD THE MATING PARTS WHEN YOU LOOSEN OR TIGHTEN THE TUBE OR HOSE NUTS. IF YOU DO NOT OBEY THIS CAUTION, YOU CAN TWIST OR CAUSE DAMAGE TO THE TUBES OR HOSES.

1 Disconnect the drain tube (DR01) from the bottom of the actuator (1).

Low Pressure Compressor (LPC) Stator Vane Actuator (SVA) (Remove the Actuator and Disconnect the Tube (DR01)) ** ON A/C NOT FOR ALL

2 Disconnect the servo pressure fuel tube (CP02) and the servo return fuel tube

Low Pressure Compressor (LPC) Stator Vane Actuator (SVA) (Disconnect the Harnesses (W03) and (W04) and the Tubes (CP02) and (CR02)) ** ON A/C NOT FOR ALL

(CR02) from the top of the actuator (1).
3 Loosen the two captive bolts (14) and the two captive bolts (15) that attach the actuator (1) to the engine.
4 Remove the actuator (1) from the engine.
(6) Installation of the protection cover.

CAUTION: INSTALL PROTECTION COVERS ON ALL THE OPENINGS IMMEDIATELY TO PREVENT DAMAGE TO THE ENGINE.

(a) Make sure that you install all the necessary COVER - PROTECTION to prevent engine damage.

[Rev.10 from 2021] 2026.04.01 03:13:29 UTC