Installation of the Electronic Engine Control (EEC) Wiring Harness (W04) [PW11]

TASK 73-21-64-400-802-A
Installation of the Electronic Engine Control (EEC) Wiring Harness (W04)

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: 4088KS ** ON A/C NOT FOR ALL

1. Reason for the Job
Use this procedure to install the harness (W04).
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
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 )
No specific	Torque wrench: range to between 100 and 90 lbf.in (1.13 and 1.02 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, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL, 462AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
4	TIE WRAPS	EIPC 73-21-63-01-500
3	TAPE - PRESSURE SENSITIVE ADHESIVE	EIPC 73-21-64-01-380

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 72-21-11-400-801-A	Installation of the Lower BiFi
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)
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
Installation of the Electronic Engine Control (EEC) Wiring Harness (W04)

3. Job Set-up
Subtask 73-21-64-941-055-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 73-21-64-865-057-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
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03

Subtask 73-21-64-010-057-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 1M(3 FT) is in position.

Subtask 73-21-64-040-052-A ** ON A/C NOT FOR ALL

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

Subtask 73-21-64-010-058-A ** ON A/C NOT FOR ALL

E. Get Access
(1) Make sure that the thrust reverser cowl-doors are open (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL, 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL, 462AR

4. Procedure

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

Subtask 73-21-64-420-052-A ** ON A/C NOT FOR ALL

A. Installation of the Electronic Engine Control (EEC) Wiring Harness (W04)

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

(1) Make sure that you remove all the necessary COVER - PROTECTION to prevent damage to the engine.
(2) Put the harness (W04) (1) on the engine.
(3) Connect the harness (W04) (1) connectors to the engine as follows:
(a) Connect the connector (P102) to the harness (W02) 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 While you tighten, push the connector in and from side to side.
5 Make sure that you can feel the ratchet feature.
6 Tighten the connector until the PLIERS - JAWED, SOFT slip on the connector ring.
(b) Connect the connectors (P3), (P5) and (P13) to the EEC receptacles (J3), (J5) and (J13) 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 While you tighten, push the connector in and from side to side.
5 Make sure that you can feel the ratchet feature.
6 Tighten the connector until the PLIERS - JAWED, SOFT slip on the connector ring.
(c) Connect the connector (P17) to the nacelle anti-ice P2 sensor receptacle (J17) 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 While you tighten, push the connector in and from side to side.
5 Make sure that you can feel the ratchet feature.
6 Tighten the connector until the PLIERS - JAWED, SOFT slip on the connector ring.
(d) Connect the connector (P67) to the exciter box receptacle (J67) 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 While you tighten, push the connector in and from side to side.
5 Make sure that you can feel the ratchet feature.
6 Tighten the connector until the PLIERS - JAWED, SOFT slip on the connector ring.
(e) Install the harness (W04) (1) to the two brackets as follows:
1 Apply the antigalling compound (Material No.P06-054) to the threads of the four bolts (2).
a For the new or refurbished bolts or nuts with baked on lubricant, do not do the wet application.
2 Install the harness (W04) (1) to the two brackets with the four bolts (2).
3 TORQUE the four bolts (2) to between 44 and 38 lbf.in (0.50 and 0.43 m.daN )

.
(f) Connect the nacelle anti-ice temperature sensor harness connector (P55) to the harness (W04) (1) receptacle (J55) 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 While you tighten, push the connector in and from side to side.
5 Make sure that you can feel the ratchet feature.
6 Tighten the connector until the PLIERS - JAWED, SOFT slip on the connector ring.
(g) Connect the harness (W03) connectors (P106) and (P107) to the harness (W04) (1) receptacles (J106) and (J107) 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 While you tighten, push the connector in and from side to side.
5 Make sure that you can feel the ratchet feature.
6 Tighten the connector until the PLIERS - JAWED, SOFT slip on the connector ring.
(h) Install the harness (W04) (1) to the lower bifi (Ref. AMM TASK 72-21-11-400-801).
(i) Install the harness (W04) (1) to the two brackets (13) and (15) as follows:
1 Engage the harness (W04) (1) to the block clamp (14) at two locations.
2 Apply the antigalling compound (Material No.P06-054) to the threads of the two bolts (12).
a For the new or refurbished bolts or nuts with baked on lubricant, do not do the wet application.
3 Install a bolt (12) to the brackets (13) and (15) at two locations.
4 TORQUE the two bolts (12) to between 100 and 90 lbf.in (1.13 and 1.02 m.daN )

.
(j) Install the harness (W04) (1) to the brackets (16) and (18) as follows:
1 Engage the harness (W04) (1) to the block clamp (17).
2 Apply the antigalling compound (Material No.P06-054) to the threads of the bolt (12).
a For the new or refurbished bolts or nuts with baked on lubricant, do not do the wet application.
3 Install a bolt (12) to the brackets (16) and (18).
4 TORQUE the bolt (12) to between 100 and 90 lbf.in (1.13 and 1.02 m.daN )

.
(k) Connect the connector (P63) to the N2 probe receptacle (J63) 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 While you tighten, push the connector in and from side to side.
5 Make sure that you can feel the ratchet feature.
6 Tighten the connector until the PLIERS - JAWED, SOFT slip on the connector ring.
(l) Connect the connector (P47) to the N1 speed probe receptacle (J47) 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 While you tighten, push the connector in and from side to side.
5 Make sure that you can feel the ratchet feature.
6 Tighten the connector until the PLIERS - JAWED, SOFT slip on the connector ring.
(m) Connect the connector (P69) to the buffer air valve pressure sensor receptacle (J56) 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 While you tighten, push the connector in and from side to side.
5 Make sure that you can feel the ratchet feature.
6 Tighten the connector until the PLIERS - JAWED, SOFT slip on the connector ring.
(n) Install the harness (W04) (1) to the bracket as follows:
1 Apply the antigalling compound (Material No.P06-054) to the threads of the two bolts (2).
a For the new or refurbished bolts or nuts with baked on lubricant, do not do the wet application.
2 Install the harness (W04) (1) to the bracket with the two bolts (2).
3 TORQUE the two bolts (2) to between 44 and 38 lbf.in (0.50 and 0.43 m.daN )

.
4 TORQUE the bolt (28) to between 44 and 38 lbf.in (0.50 and 0.43 m.daN )

.
(u) Connect the harness (WC11) connector (P105) to the harness (W04) (1) receptacle (J105) 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 While you tighten, push the connector in and from side to side.
5 Make sure that you can feel the ratchet feature.
6 Tighten the connector until the PLIERS - JAWED, SOFT slip on the connector ring.
(v) Connect the connector (P19) to the Low Pressure Compressor (LPC) Stator Vane Actuator (SVA) receptacle (J19) 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 While you tighten, push the connector in and from side to side.
5 Make sure that you can feel the ratchet feature.
6 Tighten the connector until the PLIERS - JAWED, SOFT slip on the connector ring.
(w) Connect the connector (P28) to the LPC (2.5) bleed valve actuator receptacle (J28) 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 While you tighten, push the connector in and from side to side.
5 Make sure that you can feel the ratchet feature.
6 Tighten the connector until the PLIERS - JAWED, SOFT slip on the connector ring.

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

(4) Wind the EIPC 73-21-64-01-380 TAPE - PRESSURE SENSITIVE ADHESIVE (3) around the harness (W04) (1) at the spring clips.
(a) The tape - pressure sensitive adhesive (3) must be in the center of the spring clip.

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

(5) Install the harness (W04) (1) to the spring clips marked "J" as follows:
(a) Start at the middle of the harness (W04) (1).
(b) Position and push the harness (W04) (1) into all the spring clips.
(c) Make sure that all the spring clips are engaged with the harness (W04) (1).
(d) Make sure that the tension in the harness (W04) (1) is sufficient to prevent loose or tight conditions.

NOTE: It is permitted to use the tape - pressure sensitive adhesive (3) on the harness if it is loose in the spring clips.

(6) Install the two new EIPC 73-21-63-01-500 TIE WRAPS (4) to the harness (W04) (1) and the harness (W03):

CAUTION: INSTALL TIE WRAPS ON THE HARNESS TO MAKE SURE THAT THERE IS SUFFICIENT CLEARANCE FROM THE NACELLE. IF YOU DO NOT OBEY THIS PRECAUTION, DAMAGE TO THE HARNESS CAN OCCUR.

(a)
1 Attach the tie wrap (4) around the one harness (W04) (1) lead and the harness (W03) lead at location 1.
2 Attach the tie wrap (4) around the two harness (W04) (1) leads and the one harness (W03) lead at location 2.
(7) Examine the harness (W04) (1) for contact with the engine hardware which can cause chafing.
(8) Examine the assembly for foreign objects, damage and correct assembly.

5. Close-up
Subtask 73-21-64-942-050-A ** ON A/C NOT FOR ALL

A. 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 73-21-64-865-058-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

Subtask 73-21-64-710-050-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 - FADEC System - EEC - Self-Test (Ref. AMM TASK 73-21-00-710-806).

Subtask 73-21-64-410-050-A ** ON A/C NOT FOR ALL

D. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR

Subtask 73-21-64-440-051-A ** ON A/C NOT FOR ALL

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

Subtask 73-21-64-410-051-A ** ON A/C NOT FOR ALL

F. 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

[Rev.10 from 2021] 2026.04.01 13:06:43 UTC