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

TASK 75-31-02-400-801-A
Installation 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.

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	PLIERS - JAWED, SOFT
No specific	1	STEPLADDER 0.5 M (1.6 FT)
No specific	Torque wrench: range to between 70 and 60 lbf.in (0.79 and 0.68 m.daN )
No specific	Torque wrench: range to between 75 and 65 lbf.in (0.85 and 0.73 m.daN )
No specific	Torque wrench: range to between 135 and 120 lbf.in (1.53 and 1.36 m.daN )
No specific	Torque wrench: range to between 225 and 200 lbf.in (2.54 and 2.26 m.daN )
No specific	Torque wrench: range to between 375 and 340 lbf.in (4.24 and 3.84 m.daN )

B. 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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-720-811-A	Test No. 3A - Idle Power Test
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 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 73-25-34-400-802-A	Installation of the Engine Interface Unit (EIU)
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing 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 75-31-02-941-051-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that you did 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 75-31-02-010-052-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open (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) Make sure that the STEPLADDER 0.5 M (1.6 FT) is in position.

Subtask 75-31-02-040-051-A ** ON A/C NOT FOR ALL

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) Make sure that you did the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 75-31-02-010-053-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that the right thrust-reverser cowl-door is open (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 75-31-02-420-051-A ** ON A/C NOT FOR ALL

A. Installation of the High Pressure Compressor (HPC) Stator Vane Actuator (SVA) Primary
(1) Removal of the protection covers

CAUTION: REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.

(a) Make sure that you remove COVER - PROTECTION as necessary to prevent damage to the engine.
(2) Install the actuator (1) as follows:
(a) Make sure that the actuator piston is retracted.
(b) Put the actuator (1) on the HPC SVA lever housing and engage the actuator piston on the actuator link.

NOTE: It is not necessary to align the bolt hole in the actuator piston with the actuator link at this time.

(c) Attach the actuator (1) to the HPC SVA lever housing with the three captive bolts and tighten them with your hand.
(d) Attach the actuator (1) to the SVA bracket with the two bolts (4).
(e) TORQUE the three captive bolts to between 70 and 60 lbf.in (0.79 and 0.68 m.daN )

equally in an opposite pattern until the same torque indication holds.
(f) TORQUE the two bolts (4) to between 70 and 60 lbf.in (0.79 and 0.68 m.daN )

.
(g) Attach the actuator link to the actuator (1) as follows:
1 Move the link to align with the actuator (1) piston bolt hole by turning the crank pad on the bell crank arm.
2 Attach the actuator link to the actuator (1) with shoulder bolt (2) and nut (3).
3 TORQUE the nut (3) to between 135 and 120 lbf.in (1.53 and 1.36 m.daN )

.
(3) Connect the servo fuel tubes (CP03), (CR03), (CP15), (CR15) and the drain tube (DR21) to the actuator (1) as follows:

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.

(a) Connect the tubes to the actuator (1) and tighten them with your hand.
(b) Torque the servo pressure fuel tube (CP03) as follows:
1 TORQUE the B-nut to between 225 and 200 lbf.in (2.54 and 2.26 m.daN )

.
(c) Torque the servo pressure fuel tube (CP15) as follows:
1 TORQUE the B-nut to between 225 and 200 lbf.in (2.54 and 2.26 m.daN )

.
(d) Torque the servo return fuel tube (CR03) as follows:
1 TORQUE the B-nut to between 375 and 340 lbf.in (4.24 and 3.84 m.daN )

.
(e) Torque the servo return fuel tube (CR15) as follows:
1 TORQUE the B-nut to between 225 and 200 lbf.in (2.54 and 2.26 m.daN )

.
(f) Connect the drain tube (DR21) to the actuator as follows:
1 Connect the tube (DR21) to the actuator (1) and tighten it with your hand.
2 TORQUE the B-nut to between 75 and 65 lbf.in (0.85 and 0.73 m.daN )

.
(4) Connect the (W03) wiring harness (4087KS) connector (P24) to the actuator receptacle (J24) as follows:

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTOR AND RECEPTACLE ARE CLEAN WHEN YOU CONNECT THEM. DIRTY CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.

(a) Examine, align and engage the connectors.
(b) Push lightly inward on the connector while you tighten the coupling ring.
(c) Use the PLIERS - JAWED, SOFT and tighten the connector against the receptacle.
(d) Make sure that you can feel the ratchet feature.
(e) While you tighten, push the connector in and from side to side.
(f) Tighten the connector until the pliers slip on the connector ring.
(5) Connect the (WC08) wiring harness (4094KS) connector (P25) to the actuator receptacle (J25) as follows:

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTOR AND RECEPTACLE ARE CLEAN WHEN YOU CONNECT THEM. DIRTY CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.

(a) Examine, align, and engage the connector.
(b) Push lightly inward on the connector while you tighten the coupling ring.
(c) Use the PLIERS - JAWED, SOFT and tighten the connector against the receptacle.
(d) Make sure that you can feel the ratchet feature.
(e) While you tighten, push the connector in and from side to side.
(f) Tighten the connector until the pliers slip on the connector ring.
(6) Examine the assembly for foreign objects, damage, and correct assembly.

5. Close-up
Subtask 75-31-02-410-050-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 right thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
462AR

Subtask 75-31-02-440-051-A ** ON A/C NOT FOR ALL

B. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 75-31-02-410-051-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Remove the access platform(s).
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR
(3) Remove the WARNING NOTICE(S).
(4) Make sure that all the circuit breakers shown in the paragraph Procedure of the engine interface unit installation are closed. If they are not, close them in the recommended sequence
(Ref. AMM TASK 73-25-34-400-802)

Subtask 75-31-02-720-051-A ** ON A/C NOT FOR ALL

D. Tests
(1) Do the test N°3 - Idle power test (Ref. AMM TASK 71-00-00-720-811).

[Rev.10 from 2021] 2026.04.01 03:13:33 UTC