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

TASK 73-21-61-400-802-A
Installation 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.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

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 install 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	1	PLIERS - JAWED, SOFT
No specific	Torque wrench: range to between 44 and 38 lbf.in (0.50 and 0.43 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
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR

D. 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 73-21-00-710-806-A	Test No.7 - EEC Operation Test (Self Test)
TASK 73-25-34-400-802-A	Installation of the Engine Interface Unit (EIU)
Electronic Engine Control (EEC) Wiring Harness (WF01)

3. Job Set-up
Subtask 73-21-61-941-055-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 73-21-61-865-057-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

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 73-21-61-010-059-A ** ON A/C NOT FOR ALL

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

4. Procedure
Subtask 73-21-61-420-052-A ** ON A/C NOT FOR ALL

A. Installation 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) 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) Route the harness (WF01) (1) along the engine. See the sheet 1 and 2 of the figure.
(3) Connect the harness (WF01) (1) connectors to the engine as follows:
(a) Connect the connector (P403) to the pylon receptacle (J403) as follows: see the sheet 2 of the figure.
1 Examine, align and engage the connector.
2 Push lightly on the connector while you tighten the coupling ring.
3 Use the PLIERS - JAWED, SOFT to tighten the connector against the receptacle.
4 Make sure that you can feel the ratchet feature.
5 While you tighten, push the connector in and from side to side.
6 Tighten the connector until the PLIERS - JAWED, SOFT slip on the connector ring.
(b) Connect the connector (P407) to the pylon receptacle (J407) as follows:
1 Examine, align and engage the connector.
2 Push lightly on the connector while you tighten the coupling ring.
3 Use the PLIERS - JAWED, SOFT to tighten the connector against the receptacle.
4 Make sure that you can feel the ratchet feature.
5 While you tighten, push the connector in and from side to side.
6 Tighten the connector until the PLIERS - JAWED, SOFT slip on the connector ring.
(c) Connect the connector (P2) to the EEC receptacle (J2) as follows: see the sheet 3 of the figure.
1 Examine, align and engage the connector.
2 Push lightly on the connector while you tighten the coupling ring.
3 Use the PLIERS - JAWED, SOFT to tighten the connector against the receptacle.
4 Make sure that you can feel the ratchet feature.
5 While you tighten, push the connector in and from side to side.
6 Tighten the connector until the PLIERS - JAWED, SOFT slip on the connector ring.
(d) Apply Antigalling Compound (Material No.P06-054) to the two bolts (2). See the sheet 4 of the figure.

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

(e) Install the harness (WF01) (1) to the bracket with the two bolts (2).
(f) TORQUE the two bolts (2) to between 44 and 38 lbf.in (0.50 and 0.43 m.daN )

.
(g) Connect the harness (W03) connector (P101) to the harness (WF01) (1) receptacle (J101) as follows:
1 Examine, align and engage the connector.
2 Push lightly on the connector while you tighten the coupling ring.
3 Use the PLIERS - JAWED, SOFT to tighten the connector against the receptacle.
4 Make sure that you can feel the ratchet feature.
5 While you tighten, push the connector in and from side to side.
6 Tighten the connector until the PLIERS - JAWED, SOFT slip on the connector ring.
(h) Connect the connector (P103) to the harness (WF02) receptacle (J103) as follows:
1 Examine, align and engage the connector.
2 Push lightly on the connector while you tighten the coupling ring.
3 Use the PLIERS - JAWED, SOFT to tighten the connector against the receptacle.
4 Make sure that you can feel the ratchet feature.
5 While you tighten, push the connector in and from side to side.
6 Tighten the connector until the PLIERS - JAWED, SOFT slip on the connector ring.
(4) Install the harness (WF01) (1) to the spring clips as follows: see the sheet 2 and 5 of the figure.
(a) Start at the middle of the harness (WF01) (1).
(b) Position and press the harness (WF01) (1) into the spring clips.
(c) Make sure that all the spring clips are engaged with the harness (WF01) (1).
(d) Make sure that the tension in the harness (WF01) (1) is sufficient to prevent loose or tight conditions.
(5) Make sure that the harness (WF01) (1) does not touch the engine hardware which may cause chafing.
(6) Examine the assembly for foreign objects, damage and correct assembly.

5. Close-up
Subtask 73-21-61-865-058-A ** ON A/C NOT FOR ALL

A. Remove the safety clip(s) and the tag(s) and close 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 73-21-61-942-051-A ** ON A/C NOT FOR ALL

B. 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) Remove the WARNING NOTICE(S).

Subtask 73-21-61-710-050-A ** ON A/C NOT FOR ALL

C. Test
(1) 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).
(2) Do the test No. 7 - EEC Operation Test (Self Test) (Ref. AMM TASK 73-21-00-710-806).

Subtask 73-21-61-410-050-A ** ON A/C NOT FOR ALL

D. 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

[Rev.10 from 2021] 2026.04.01 13:06:42 UTC