Installation of the Electrical Harness HJ2B for the Channel B Ignition System [CFML]

TASK 71-51-43-400-810-A
Installation of the Electrical Harness HJ2B for the Channel B Ignition System

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.

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

ZONE: 210
ZONE: 400
FIN: 4178KS

1. Reason for the Job
Self explanatory
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	WARNING NOTICE(S)
No specific	Torque wrench: range to between 0.42 and 0.37 m.daN (37.2 and 32.7 lbf.in )
No specific	Torque wrench: range to between 0.67 and 0.58 m.daN (59.29 and 51.33 lbf.in )
No specific	Torque wrench: range to between 0.79 and 0.68 m.daN (69.91 and 60.18 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CPNCL00062)	LUBRICATING OIL TURBINE ENGINE SYNT BASE
(Material No.CPNCL00957)	GLASS FIBER TAPE (3M tape 361)
(Material No.CPNCL02069)	LINT-FREE COTTON CLOTH
(Material No.CPNCL02589)	GENERAL CLEANING AGENT - MULTI PURPOSE

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 70-70-00-910-804-A	Electrical Standard Practices
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 72-24-07-400-801-A	Installation of the Fireproof Plate
TASK 73-29-00-740-804-A	Thrust Reverser Cycling Test (Menu Mode)
TASK 74-00-00-710-803-A	Ignition Test (Menu Mode)
TASK 74-11-05-400-801-A	Installation of Ignition Exciter 1
TASK 78-30-00-040-807-A	Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU)
TASK 78-30-00-440-807-A	Reactivation of the Thrust Reverser System after Nacelle Maintenance (ICU)
TASK 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
TASK 78-36-00-410-806-A	Closing of the Thrust Reverser Cowl Doors
Electrical Harness for the Channel B Ignition System HJ2B (PRE and POST SB 72-0402)

3. Job Set-up
Subtask 71-51-43-941-089-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) Make sure that the WARNING NOTICE(S) are 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) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).

Subtask 71-51-43-010-109-A

B. Get Access
(1) Make sure that the fan cowl doors are open (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
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position under the right fan cowl door.

Subtask 71-51-43-040-059-A

C. 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 nacelle maintenance (Ref. AMM TASK 78-30-00-040-807).

Subtask 71-51-43-010-121-A

D. Get Access
(1) Make sure that the thrust reverser cowl-doors are open (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR

4. Procedure
Subtask 71-51-43-420-086-A

A. Installation of the Electrical Harness (2) for the Channel B Ignition System
(1) Remove all the COVER - PROTECTION and CAP - PROTECTION from all open connectors and receptacles.
(2) Lubricate the threads of the four bolts (41), two bolts (14), two bolts (11), bolt (4) and bolt (46) with LUBRICATING OIL TURBINE ENGINE SYNT BASE (Material No.CPNCL00062) .
(3) Put the P-clamps (3) and (47) in position on the electrical harness (2).
(a) Use the record made during the removal procedure to help get the correct location and position.
(4) Put the electrical harness (2) in position on the engine.
(a) Use the record made during the removal procedure to help get the correct routing.
(5) Push the electrical harness (2) into the spring clips on the support brackets (7), (16), (17), (18), (22), (20), (25), (26), (28), (29), (44) and (45).

NOTE: In case of looseness at electrical harness to spring clip interfaces, you can use CPNCL00957GLASS FIBER TAPE (3M tape 361) to assure the retention of the electrical harness into the spring clip as follows:

Clean the electrical harness with a LINT-FREE COTTON CLOTH (Material No.CPNCL02069) made moist with GENERAL CLEANING AGENT - MULTI PURPOSE (Material No.CPNCL02589) .
Dry the electrical harness with a LINT-FREE COTTON CLOTH (Material No.CPNCL02069) before the solvent becomes gas.
Roll up the electrical harness with CPNCL00957GLASS FIBER TAPE (3M tape 361) to assure a good retention into the spring clip.

(6) Install the bolt (4) that attaches the P-clamp (3) to the support bracket (5).
(7) TORQUE the bolt (4) to between 0.42 and 0.37 m.daN (37.2 and 32.7 lbf.in )

.
(8) Install the bolt (46) that attaches the P-clamp (47) to the support bracket (17).
(9) TORQUE the bolt (46) to between 0.79 and 0.68 m.daN (69.91 and 60.18 lbf.in )

.
(10) Connect the electrical connectors on the electrical harness (2) that follow (Ref. AMM TASK 70-70-00-910-804):

Connect the electrical connector (1) to the receptacle on the Pylon Junction Box (PJB) (6).
Connect the electrical connector (21) to the receptacle on the channel B Electronic Engine Control (ECC) (23).

(11) Connect the electrical connector (9) at the support bracket (16) as follow:
(a) Install the two bolts (14) that attach the electrical connector (9) to the support bracket (16).
(b) TORQUE the two bolts (14) to between 0.42 and 0.37 m.daN (37.2 and 32.7 lbf.in )

.
(c) Connect the electrical connector (15) to the electrical connector (9) on the aft side of the support bracket (16) (Ref. AMM TASK 70-70-00-910-804).
(12) Connect the electrical connector (13) at the support bracket (12) as follow:
(a) Install the two bolts (11) that attach the electrical connector (13) to the support bracket (12).
(b) TORQUE the two bolts (11) to between 0.42 and 0.37 m.daN (37.2 and 32.7 lbf.in )

.
(c) Connect the electrical connector (10) to the electrical connector (13) on the forward side of the support bracket (12) (Ref. AMM TASK 70-70-00-910-804).
(13) Remove the access platform from under the right fan cowl door.
(14) Put the electrical harness (2) in the fireproof block (33).
(15) Install the fireproof plate and fireproof block (Ref. AMM TASK 72-24-07-400-801).
(16) Push the electrical harness (2) into the spring clips on the support brackets (30), (34) and (38).

Clean the electrical harness with a LINT-FREE COTTON CLOTH (Material No.CPNCL02069) made moist with GENERAL CLEANING AGENT - MULTI PURPOSE (Material No.CPNCL02589) .
Dry the electrical harness with a LINT-FREE COTTON CLOTH (Material No.CPNCL02069) before the solvent becomes gas.
Roll up the electrical harness with CPNCL00957GLASS FIBER TAPE (3M tape 361) to assure a good retention into the spring clip.

(17) Connect the electrical connector (39) to the ignition exciter (40) (Ref. AMM TASK 70-70-00-910-804).
(18) Install the four bolts (41) and the exciter shroud lid (42) on the exciter shroud (43) (Ref. AMM TASK 74-11-05-400-801).
(19) TORQUE the four bolts (41) to between 0.67 and 0.58 m.daN (59.29 and 51.33 lbf.in )

.
(20) Adjust the tension in the electrical harness (2) along the routing.

NOTE: If required, it is permissible to tape the harnesses at clamping locations where the fit is too loose with CPNCL00957GLASS FIBER TAPE (3M tape 361).

(a) Make sure the harness does not touch adjacent parts.

5. Close-up
Subtask 71-51-43-410-089-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR

Subtask 71-51-43-440-054-A

B. Do the reactivation of the thrust reverser system after nacelle maintenance (Ref. AMM TASK 78-30-00-440-807).

Subtask 71-51-43-410-082-A

C. Close Access
(1) 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
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

Subtask 71-51-43-710-077-A

D. Test(s)
(1) Do the ignition test (menu mode) (Ref. AMM TASK 74-00-00-710-803).
(2) Do the thrust reverser cycling test (menu mode) (Ref. AMM TASK 73-29-00-740-804).

[Rev.10 from 2021] 2026.04.02 06:33:29 UTC