Removal of the High Pressure Compressor (HPC) Stator Vane Actuator (SVA) Primary [PW11]

TASK 75-31-02-000-801-A
Removal of the High Pressure Compressor (HPC) Stator Vane Actuator (SVA) Primary

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.

CAUTION: DO NOT LET FUEL OR OIL FALL ON THE ENGINE. YOU MUST IMMEDIATELY REMOVE UNWANTED FUEL OR OIL WITH A CLOTH. THE FUEL OR OIL CAN CAUSE DAMAGE TO SOME ENGINE PARTS.

FIN: 4052KS ** ON A/C NOT FOR ALL

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	CONTAINER 20L (5 USGAL)
No specific	1	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
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 462AR

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 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
High Pressure Compressor (HPC) Stator Vane Actuator (SVA) Primary
High Pressure Compressor (HPC) Stator Vane Actuator (SVA) Primary

3. Job Set-up
Subtask 75-31-02-941-050-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 75-31-02-010-050-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 75-31-02-040-050-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser System for Maintenance

WARNING: MAKE SURE THAT YOU DO THE DEACTIVATION OF THE THRUST REVERSER BEFORE YOU DO MAINTENANCE WORK ON OR AROUND THE THRUST REVERSER. IF YOU DO NOT DO THIS PROCEDURE, THERE IS A RISK OF UNWANTED OPERATION AND THUS OF INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.

(1) Do the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 75-31-02-010-051-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the right thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
462AR

4. Procedure

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

Subtask 75-31-02-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the High Pressure Compressor (HPC) Stator Vane Actuator (SVA) Primary
(1) Find the actuator (1) located on the HPC at the 3 o'clock position.
(2) Remove the actuator (1) as follows:
(a) Disconnect the wiring harness (W03) and (WC08) connectors (P24) and (P25) from the actuator (1) with the PLIERS - JAWED, SOFT.
(b) Remove the nut (12) and bolt (11) that attach the actuator piston to the actuator link.
(c) Put the CONTAINER 20L (5 USGAL) under the actuator (1).
(d) Put a lint-free cotton cloth (Material No.P05-005) under the actuator (1).
(e) Disconnect the tubes as follow:

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 (DR21) from the bottom of the actuator (1).
2 Disconnect the servo pressure fuel tube (CP03) from the actuator (1).
3 Remove the servo pressure fuel tube (CP15) from the actuator (1).
4 Disconnect the servo return fuel tube (CR03) from the actuator (1).
5 Remove the servo return fuel tube (CR15) from the actuator (1).
6 Remove the two bolts (13) that attach the actuator (1) to the HPC bracket.
7 Loosen the three captive bolts that attach the actuator (1) to the SVA lever housing.
8 Remove the actuator (1) from the engine.
(3) Installation of the protection covers

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

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

[Rev.10 from 2021] 2026.04.01 03:13:32 UTC