Install the High Pressure Compressor (HPC) Stator Vane Actuator (SVA) Secondary Unit [PW11]

TASK 75-31-04-400-801-A
Install the High Pressure Compressor (HPC) Stator Vane Actuator (SVA) Secondary Unit

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: 4053KS ** 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	Torque wrench: range to between 60 and 50 lbf.in (0.68 and 0.57 m.daN )
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 100 and 90 lbf.in (1.13 and 1.02 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 )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.P06-054)	Antigalling Compound

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
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 71-00-00-720-811-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 73-21-00-710-807-A	Test No.6 - EEC Operation Test (Idle Test)
TASK 73-21-00-710-809-A	Test No.15 - Operation Test (Dry Motor) of the FADEC System Engine Actuators
TASK 73-21-04-400-801-A	Installation of the Permanent Magnet Alternator (PMA) Stator
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
TASK 79-32-21-400-801-A	Installation of the Oil Temperature Probe
High Pressure Compressor (HPC) Stator Vane Actuator (SVA) Secondary Unit

3. Job Set-up
Subtask 75-31-04-941-051-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 75-31-04-010-052-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

Subtask 75-31-04-040-051-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) Make sure that you did the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 75-31-04-010-053-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that the left thrust reverser cowl-doors are open (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 75-31-04-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the High Pressure Compressor (HPC) Stator Vane Actuator (SVA) Secondary Unit
(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 all the necessary COVER - PROTECTION to prevent damage to the engine.
(2) Install the actuator (1) as follows:
(a) Make sure that the actuator (1) piston is retracted.
(b) Put the actuator (1) on the HPC SVA lever housing and engage the piston on the actuator link.

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

(c) Attach the actuator (1) to the HPC SVA lever housing with the three captive bolts finger-tight.
(d) Apply Antigalling Compound (Material No.P06-054) to the threads of the two bolts (2).

NOTE: For new or refurbished bolts or nuts with baked on lubricant, do not do the wet application.

(e) Install the SVA bracket (3) on the HPC case with the two bolts (2) finger-tight.
(f) Attach the actuator (1) to the SVA bracket (3) with the two bolts (4) finger-tight.
(g) TORQUE the three captive bolts to between 60 and 50 lbf.in (0.68 and 0.57 m.daN )

equally in an opposite pattern until the same torque indication holds.
(h) TORQUE the two bolts (2) to between 100 and 90 lbf.in (1.13 and 1.02 m.daN )

.
(i) TORQUE the two bolts (4) to between 70 and 60 lbf.in (0.79 and 0.68 m.daN )

.
(j) Attach the link to the actuator (1) as follows:
1 Move the actuator (1) piston to align the bolt hole with the link.
2 Attach the link to the actuator (1) with the shoulder bolt (5) and nut (6).
3 TORQUE the nut (6) to between 135 and 120 lbf.in (1.53 and 1.36 m.daN )

.
(3) Install the three servo fuel tubes (CP18), (CR13), (CR18) and the drain tube (DR23) on 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 drain tube (DR23) to the actuator (1).
1 TORQUE the B-nut to between 75 and 65 lbf.in (0.85 and 0.73 m.daN )

.
(b) Connect the servo pressure fuel tube (CP18) to the actuator (1).
1 TORQUE the B-nut to between 225 and 200 lbf.in (2.54 and 2.26 m.daN )

.
(c) Connect the servo return fuel tube (CR13) to the actuator (1).
1 TORQUE the B-nut to between 75 and 65 lbf.in (0.85 and 0.73 m.daN )

.
(d) Connect the servo return fuel tube (CR18) to the actuator (1).
1 TORQUE the B-nut to between 225 and 200 lbf.in (2.54 and 2.26 m.daN )

.
(4) Connect the (WC10) wiring harness connector (P29) to the actuator receptacle (J29) 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 the connector lightly inward on 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 - JAWED, SOFT slip on the connector ring.
(5) Install the wiring harness (W03) connector (P12) on the receptacle (J12) and install the wiring harness (W04) connector (P11) on the receptacle (J11) (Ref. AMM TASK 73-21-04-400-801).
(6) Install the wiring harness (W03) connector (P33) on the receptacle (J33) (Ref. AMM TASK 79-32-21-400-801).
(7) Examine the assembly for unwanted objects, damage and correct assembly.

5. Close-up
Subtask 75-31-04-860-050-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the left thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL

Subtask 75-31-04-440-050-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 75-31-04-410-050-A ** ON A/C NOT FOR ALL

C. Close Access
(1) 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
(2) Remove the access platform(s).
(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 75-31-04-720-050-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).
(2) Do the test N°15 - Operation Test (Dry Motor) of the Engine Actuators (Ref. AMM TASK 73-21-00-710-809).
(3) Do the test N°6 - EEC - Idle test (Ref. AMM TASK 73-21-00-710-807).

[Rev.10 from 2021] 2026.04.01 03:13:35 UTC