Visual Inspection of the Permanent Magnet Alternator (PMA) Stator [CFML]

TASK 73-21-40-210-802-A
Visual Inspection of the Permanent Magnet Alternator (PMA) Stator

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
TASK 73-21-40-000-802-A	Removal of the Permanent Magnet Alternator (PMA) Stator
TASK 73-21-40-400-802-A	Installation of the Permanent Magnet Alternator (PMA) Stator

3. Job Set-up
Subtask 73-21-40-941-060-A

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate:

The ENG/MODE selector switch
The ENG/MASTER 1(2) control switch.

(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 73-21-40-010-062-A

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR

4. Procedure
Subtask 73-21-40-210-052-A

A. Do the inspection of the Permanent Magnet Alternator (PMA) stator

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Examine the PMA stator for:
a) Loose ablative coating on the housing	Not permitted.	If you find loose ablative coating on the housing that does not have a good bond replace the PMA (Ref. AMM TASK 73-21-40-000-802) and (Ref. AMM TASK 73-21-40-400-802).
b) Ablative coating that is cut, peeling, flaking, missing or other conditions that decrease the coating thickness	Permitted if the damaged area is less than 10 percent of the total ablative coating, and you do the repair of the ablative coating.	You can repair a maximum of 10 percent of the total ablative coating. Contact General Electric (GE) for the "Permanent Magnet Alternator - Specific Repair" Procedure.
	Not permitted to have more than 10 percent of the coating damaged or missing.	Replace the PMA (Ref. AMM TASK 73-21-40-000-802) and (Ref. AMM TASK 73-21-40-400-802).

5. Close-up
Subtask 73-21-40-410-058-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:04:51 UTC