Installation of the EEC Wiring Harness (WF02) [PW11]

TASK 73-21-62-400-802-A
Installation of the EEC Wiring Harness (WF02)

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.

ZONE: 400
FIN: 4218KS ** ON A/C NOT FOR ALL

1. Reason for the Job
Use this procedure to install the harness (WF02).
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
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
3	TAPE - PRESSURE SENSITIVE ADHESIVE	EIPC 73-21-62-01-340

E. Referenced Information

REFERENCE	DESIGNATION
TASK 23-44-00-700-001-A	Operational Test of the Service Interphone
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)
EEC Wiring Harness WF02

3. Job Set-up
Subtask 73-21-62-941-055-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).
(2) On maintenance panel 80VU:
(a) Make sure that ON legend on the SVCE INTERPHONE OVRD pushbutton switch is off.

Subtask 73-21-62-865-058-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
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
49VU	ANTI ICE/PROBES/AOA/1	4DA1	D04
49VU	ANTI ICE/PROBES/PITOT/1	3DA1	D02
49VU	ANTI ICE/RAIN/RPLNT/CAPT	1DB1	D01
49VU	NAV PROBES/ADIRU 1/AND AOA 1/26VAC	5FP1	F07
105VU	ADIRS/ADIRU1/28VDC	6FP1	C02
122VU	ANTI ICE/WINDOWS/R	4DG2	W14
122VU	ANTI ICE/RAIN/RPLNT/F/O	1DB2	W11
122VU	ANTI ICE/WINDOWS/L	4DG1	X14
122VU	ANTI ICE/PROBES/2/TAT	1DA2	Y15
122VU	ANTI ICE/PROBES/2/PITOT	3DA2	Y14
122VU	ANTI ICE/PROBES/2/AOA	4DA2	Y13
122VU	ANTI ICE/PROBES/2/STATIC	5DA2	Y11
122VU	ANTI ICE/PROBES/3/PITOT	3DA3	Z16
122VU	ANTI ICE/PROBES/3/AOA	4DA3	Z15
122VU	ANTI ICE/PROBES/3/STATIC	5DA3	Z14
122VU	ANTI ICE/PROBES/1/STATIC	5DA1	Z13
122VU	ANTI ICE/PROBES/1/TAT	1DA1	Z12
** ON A/C NOT FOR ALL
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENG 1)
121VU	ICU A/ENG1 PWR SUPPLY	22KS1	R39
** ON A/C NOT FOR ALL
121VU	PHMU/ENG1	95KS1	P44
** ON A/C NOT FOR ALL
121VU	ICU A/ENG1 PWR SUPPLY	22KS1	R38
** ON A/C NOT FOR ALL
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENG 2)
121VU	ICU A/ENG2 PWR SUPPLY	22KS2	R40
** ON A/C NOT FOR ALL
121VU	PHMU/ENG2	95KS2	P45
** ON A/C NOT FOR ALL
121VU	ICU A/ENG2 PWR SUPPLY	22KS2	R39

Subtask 73-21-62-865-059-A ** ON A/C NOT FOR ALL

WARNING: MAKE SURE THAT THE PROBE HEATER AND WINDOW HEATER CIRCUIT-BREAKERS ARE OPEN BEFORE YOU OPEN THE PHC AND WHC CIRCUIT BREAKERS. IF YOU DO NOT OBEY THIS SEQUENCE:

THE PROBES WILL BECOME TOO HOT.
THIS CAN CAUSE INJURY TO MAINTENANCE PERSONNEL AND/OR DAMAGE TO EQUIPMENT.

WARNING: OPEN CIRCUIT BREAKERS 2KS1 AND 2KS2 AFTER YOU OPEN THE IGNITION CIRCUIT BREAKERS. IF YOU DO NOT, THE CONTINUOUS IGNITION SYSTEM WILL BE ACTIVATED.

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	ANTI ICE/PROBES/PHC/1	2DA1	D03
122VU	ANTI ICE/WHC/2	5DG2	W13
122VU	ANTI ICE/WHC/1	5DG1	X13
122VU	ANTI ICE/PROBES/PHC/3	2DA3	Y16
122VU	ANTI ICE/PROBES/PHC/2	2DA2	Y12
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENG 1)
49VU	ENGINE/1/FADEC A/AND EIU 1	2KS1	A04
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R41
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R40
** ON A/C NOT FOR ALL
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENG 2)
49VU	ENGINE/2/FADEC A/AND EIU 2	2KS2	A05
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG2/FADEC B/AND EIU2	4KS2	Q40
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG2/FADEC B/AND EIU2	4KS2	R41

Subtask 73-21-62-010-059-A ** ON A/C NOT FOR ALL

D. 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 73-21-62-420-052-A ** ON A/C NOT FOR ALL

A. Installation of the EEC Wiring Harness WF02

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 COVER - PROTECTION as necessary to prevent damage to the engine.
(2) Route the harness (WF02) (1) along the engine. See the sheet 1 of the figure:

EEC Wiring Harness WF02 ** ON A/C NOT FOR ALL

(3) Connect the harness (WF02) (1) connectors to the engine as follows:
(a) Connect the connector (P402) to the pylon receptacle (J402) as follows:
1 Examine, align and engage the connector.
2 Push lightly in 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 (P406) to the pylon receptacle (J406) as follows:
1 Examine, align and engage the connector.
2 Push lightly in 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 (P79) to the interphone jack receptacle (J79) as follows: See the sheet 2 of the figure:

EEC Wiring Harness WF02 ** ON A/C NOT FOR ALL

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

(e) Install the harness (WF02) (1) to the bracket with the four bolts (2).
(f) TORQUE the four bolts (2) to between 44 and 38 lbf.in (0.50 and 0.43 m.daN )

.
(g) Connect the harness (W04) connector (P102) to the harness (WF02) receptacle (J102) as follows:
1 Examine, align and engage the connector.
2 Push lightly in 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 harness (WF01) connector (P103) to the harness (WF02) (1) receptacle (J103) as follows:
1 Examine, align and engage the connector.
2 Push lightly in 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.
(i) Connect the connector (P122) to the T2 probe harness receptacle (J122) as follows: See the sheet 3 of the figure:

EEC Wiring Harness WF02 ** ON A/C NOT FOR ALL

1 Examine, align and engage the connector.
2 Push lightly in 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.
(k) Connect the connector (P9) to the Prognostics and Health Management Unit (PHMU) receptacle (J9) as follows:
1 Examine, align and engage the connector.
2 Push lightly in 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.
(l) Install the harness (WF02) (1) to the bracket (14) as follows: See the sheet 6 of the figure:

EEC Wiring Harness WF02 ** ON A/C NOT FOR ALL

1 Apply Antigalling Compound (Material No.P06-054) to the threads of the bolt (12).

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

2 Install the harness (WF02) (1) to the bracket (14) with the bolt (12) and clamp (13).
3 TORQUE the bolt (12) to between 44 and 38 lbf.in (0.50 and 0.43 m.daN )

.

POST SB C-72-00-0105A: Harness Protection Method

(m) Wrap the harness (WF02) (1) at the spring clip with EIPC 73-21-62-01-340 TAPE - PRESSURE SENSITIVE ADHESIVE (3). See the sheets 1 and 3 of the figure:

EEC Wiring Harness WF02 ** ON A/C NOT FOR ALL

1 Tape - pressure sensitive adhesive must be in the center of the spring clip.
(n) Wrap the harness (WF02) (1) at the spring clip with EIPC 73-21-62-01-340 TAPE - PRESSURE SENSITIVE ADHESIVE (3). See the sheets 1 and 7 of the figure:

EEC Wiring Harness WF02 ** ON A/C NOT FOR ALL

1 Tape - pressure sensitive adhesive must be in the center of the spring clip.

END OF POST SB C-72-00-0105A: Harness Protection Method

(o) Install the harness (WF02) (1) to the ten spring clips as follows: See the sheets 1 and 4 of the figure:

EEC Wiring Harness WF02 ** ON A/C NOT FOR ALL

1 Start at the middle of the harness (WF02) (1).
2 Position and push the harness (WF02) (1) into the ten spring clips.
3 Make sure that all the spring clips engage with the harness (WF02) (1).
4 Make sure that the tension in the harness (WF02) (1) is sufficient to prevent loose or tight conditions.
(p) Examine the harness (WF02) (1) for contact with engine hardware which can cause chafing.
(q) Examine the assembly for foreign objects, damage and correct assembly.

5. Close-up
Subtask 73-21-62-865-060-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
49VU	ANTI ICE/PROBES/PHC/1	2DA1	D03
122VU	ANTI ICE/WHC/2	5DG2	W13
122VU	ANTI ICE/WHC/1	5DG1	X13
122VU	ANTI ICE/PROBES/PHC/3	2DA3	Y16
122VU	ANTI ICE/PROBES/PHC/2	2DA2	Y12
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENG 1)
49VU	ENGINE/1/FADEC A/AND EIU 1	2KS1	A04
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R41
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R40
** ON A/C NOT FOR ALL
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENG 2)
49VU	ENGINE/2/FADEC A/AND EIU 2	2KS2	A05
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG2/FADEC B/AND EIU2	4KS2	Q40
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG2/FADEC B/AND EIU2	4KS2	R41

Subtask 73-21-62-865-061-A ** ON A/C NOT FOR ALL

B. 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
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
49VU	ANTI ICE/PROBES/AOA/1	4DA1	D04
49VU	ANTI ICE/PROBES/PITOT/1	3DA1	D02
49VU	ANTI ICE/RAIN/RPLNT/CAPT	1DB1	D01
49VU	NAV PROBES/ADIRU 1/AND AOA 1/26VAC	5FP1	F07
105VU	ADIRS/ADIRU1/28VDC	6FP1	C02
122VU	ANTI ICE/WINDOWS/R	4DG2	W14
122VU	ANTI ICE/RAIN/RPLNT/F/O	1DB2	W11
122VU	ANTI ICE/WINDOWS/L	4DG1	X14
122VU	ANTI ICE/PROBES/2/TAT	1DA2	Y15
122VU	ANTI ICE/PROBES/2/PITOT	3DA2	Y14
122VU	ANTI ICE/PROBES/2/AOA	4DA2	Y13
122VU	ANTI ICE/PROBES/2/STATIC	5DA2	Y11
122VU	ANTI ICE/PROBES/3/PITOT	3DA3	Z16
122VU	ANTI ICE/PROBES/3/AOA	4DA3	Z15
122VU	ANTI ICE/PROBES/3/STATIC	5DA3	Z14
122VU	ANTI ICE/PROBES/1/STATIC	5DA1	Z13
122VU	ANTI ICE/PROBES/1/TAT	1DA1	Z12
** ON A/C NOT FOR ALL
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENG 1)
121VU	ICU A/ENG1 PWR SUPPLY	22KS1	R39
** ON A/C NOT FOR ALL
121VU	PHMU/ENG1	95KS1	P44
** ON A/C NOT FOR ALL
121VU	ICU A/ENG1 PWR SUPPLY	22KS1	R38
** ON A/C NOT FOR ALL
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENG 2)
121VU	ICU A/ENG2 PWR SUPPLY	22KS2	R40
** ON A/C NOT FOR ALL
121VU	PHMU/ENG2	95KS2	P45
** ON A/C NOT FOR ALL
121VU	ICU A/ENG2 PWR SUPPLY	22KS2	R39

Subtask 73-21-62-860-054-A ** ON A/C NOT FOR ALL

C. 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 73-21-62-710-050-A ** ON A/C NOT FOR ALL

D. Test(s)
(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 (Ref. AMM TASK 73-21-00-710-806).

Subtask 73-21-62-410-050-A ** ON A/C NOT FOR ALL

E. 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

Subtask 73-21-62-710-051-A ** ON A/C NOT FOR ALL

F. Do the operational test of the service interphone (Ref. AMM TASK 23-44-00-700-001)

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