Removal of the Electronic Engine Control (EEC) Wiring Harness (WF01) [PW11]

TASK 73-21-61-000-802-A
Removal of the Electronic Engine Control (EEC) Wiring Harness (WF01)

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.

CAUTION: DO NOT BEND OR TWIST THE HARNESS TOO MUCH. IF YOU DO, DAMAGE TO THE HARNESS CAN OCCUR.

FIN: 4217KS ** ON A/C NOT FOR ALL

1. Reason for the Job
Use this procedure to remove the harness (WF01).
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	COVER - PROTECTION
No specific	1	PLIERS - JAWED, SOFT
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

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

C. 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
Electronic Engine Control (EEC) Wiring Harness (WF01)

3. Job Set-up
Subtask 73-21-61-941-054-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 73-21-61-865-056-A ** ON A/C NOT FOR ALL

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	ADIRS/ADIRU/2/26VAC AND AOA	5FP2	N08
121VU	ADIRS/ADIRU/2/28VDC	6FP2	N04
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENG 1)
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41
121VU	ICU B/ENG1 PWR SUPPLY	101KS1	R42
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENG 2)
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42
121VU	ICU B/ENG2 PWR SUPPLY	101KS2	R43

Subtask 73-21-61-010-058-A ** ON A/C NOT FOR ALL

C. 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 ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.

4. Procedure
Subtask 73-21-61-020-052-A ** ON A/C NOT FOR ALL

A. Removal of the Electronic Engine Control (EEC) Wiring Harness (WF01)

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

(1) Find the harness (WF01) (1) attached to the right hand-side of the fan case.
(2) Remove the harness (WF01) (1) from the engine as follows:
(a) Disconnect the harness (WF01) connectors from the engine with the PLIERS - JAWED, SOFT as follows:
1 Disconnect the connector (P2) from the EEC.
2 Disconnect the connector (P403) from the pylon.
3 Disconnect the connector (P407) from the pylon.
4 Disconnect the harness (W03) connector (P101) from the harness (WF01) (1).
5 Disconnect the connector (P103) from the harness (WF02).
(b) Remove the two bolts (2) and the harness (WF01) (1) from the bracket.
(c) Remove the harness (WF01) (1) from the spring clips.
(d) Remove the harness (WF01) (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 03:03:01 UTC