Installation of the Permanent Magnet Alternator (PMA) Stator [PW11]

TASK 73-21-04-400-801-A
Installation of the Permanent Magnet Alternator (PMA) Stator

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: 4021EV ** 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	COVER - PROTECTION
No specific	1	PLIERS - JAWED, SOFT
No specific	Torque wrench: range to between 30 and 26 lbf.in (0.34 and 0.29 m.daN )
No specific	Torque wrench: range to between 230 and 200 lbf.in (2.60 and 2.26 m.daN )
PWA211307	1	COVER, PROTECTOR

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.P03-001)	lubricant, aircraft turbine engine

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. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
2	PACKING	EIPC 73-21-04-01-080
3	FACE SEAL	EIPC 73-21-04-01-090

E. 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 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 73-25-34-400-802-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
Permanent Magnet Alternator (PMA) Stator
Permanent Magnet Alternator (PMA) Stator - Harnesses (W03) and (W04)
Permanent Magnet Alternator (PMA) Stator - Protective Cover

3. Job Set-up
Subtask 73-21-04-941-051-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 73-21-04-010-052-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 73-21-04-040-051-A ** ON A/C NOT FOR ALL

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

Subtask 73-21-04-010-053-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that the left thrust-reverser cowl-door is 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
Subtask 73-21-04-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Permanent Magnet Alternator (PMA) Stator

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

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

(1) Removal of the protection covers:
(a) Make sure that you remove all the necessary COVER - PROTECTION to prevent damage to the engine.
(b) Loosen the three cap screws and remove the PWA211307 COVER, PROTECTOR.

Permanent Magnet Alternator (PMA) Stator - Protective Cover ** ON A/C NOT FOR ALL

CAUTION: BE CAREFUL WHEN YOU REMOVE OR INSTALL THE PMA STATOR. THE MAGNETS ON THE PMA WILL APPLY A MAGNETIC PULL TO THE STATOR. DAMAGE TO THE STATOR AND THE ROTOR CAN OCCUR IF YOU DO NOT HOLD THE STATOR CAREFULLY.

CAUTION: BE CAREFUL NOT TO CAUSE DAMAGE TO THE PMA EXTERNAL COATING WHEN YOU REMOVE OR INSTALL THE PMA STATOR. IF YOU DO NOT OBEY THIS CAUTION, DAMAGE TO ENGINE PARTS CAN OCCUR.

(2) Install the PMA stator (1) on the Main Gearbox (MGB) as follows:

Permanent Magnet Alternator (PMA) Stator ** ON A/C NOT FOR ALL

(a) Apply P03-001lubricant, aircraft turbine engine to the new EIPC 73-21-04-01-080 PACKING (2).
(b) Install the packing (2) on the PMA stator (1).
(c) Install the face seal (3) on the PMA stator (1) with the two screws (4):
1 Visually examine the used face seal to find out if you can use it again as follows:
a Make sure there is no raised material on the metal surface which is not permitted.
b Do a check for rubber that is not bonded to the metal surface which is not permitted.
c Examine the rubber seal for separation from the metal surface.
d If there is missing or cut rubber, or if it shows signs of rubber separation or other damage:

You must install a new EIPC 73-21-04-01-090 FACE SEAL (3).

e Make sure that the rubber material is above the metal surface.
(d) TORQUE the two screws (4) to between 30 and 26 lbf.in (0.34 and 0.29 m.daN )

.
(e) Align and install the PMA stator (1) on the MGB with the three captive bolts.
(f) Tighten the bolts:

CAUTION: WHEN YOU TORQUE THE BOLTS, USE A TOOL THAT WILL NOT TOUCH THE COATING ON THE PMA. IF THE TOOL TOUCHES THE PMA COATING, DAMAGE TO THE COATING CAN OCCUR.

1 TORQUE the three captive bolts to between 230 and 200 lbf.in (2.60 and 2.26 m.daN )

equally in an opposite pattern until the same torque indication holds.
(3) Connect the wiring harness (W03) connector (P12) to the stator receptacle (J12) as follows:

Permanent Magnet Alternator (PMA) Stator - Harnesses (W03) and (W04) ** ON A/C NOT FOR ALL

CAUTION: MAKE SURE THAT ELECTRICAL CONNECTORS ARE CLEAN WHEN YOU CONNECT THEM. THE CONTAMINATION OF ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO THE EQUIPMENT.

CAUTION: USE THE CORRECT ASSEMBLY PROCEDURE AND TOOLS FOR THE HARNESS CONNECTOR INSTALLATION. IF YOU DO NOT, A DAMAGED OR LOOSE CONNECTOR CAN OCCUR. A LOOSE CONNECTOR CAN CAUSE UNSATISFACTORY ENGINE OPERATION, DECREASED LIGHTNING PROTECTION AND A POSSIBLE IN-FLIGHT SHUTDOWN.

(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.
(4) Connect the wiring harness (W04) connector (P11) to the stator receptacle (J11) as follows:

Permanent Magnet Alternator (PMA) Stator - Harnesses (W03) and (W04) ** ON A/C NOT FOR ALL

CAUTION: MAKE SURE THAT ELECTRICAL CONNECTORS ARE CLEAN WHEN YOU CONNECT THEM. THE CONTAMINATION OF ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO THE 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.
(5) Connect the wiring harness (W03) connector (P33) to the oil temperature sensor (J33) as follows:

Permanent Magnet Alternator (PMA) Stator - Harnesses (W03) and (W04) ** ON A/C NOT FOR ALL

(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) Install the wiring harnesses to the spring clips as necessary:

Permanent Magnet Alternator (PMA) Stator - Harnesses (W03) and (W04) ** ON A/C NOT FOR ALL

(7) Examine the assembly for foreign objects, damage and correct assembly.

5. Close-up
Subtask 73-21-04-410-050-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 left thrust-reverser cowl-door (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 73-21-04-440-050-A ** ON A/C NOT FOR ALL

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

Subtask 73-21-04-410-051-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 WARNING NOTICE(S).
(3) 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 73-21-04-720-050-A ** ON A/C NOT FOR ALL

D. Test
(1) Do the test N°6 - EEC - Idle test (Ref. AMM TASK 73-21-00-710-807).

[Rev.10 from 2021] 2026.04.01 13:03:26 UTC