Installation of the CJ12L Harness [CFMB]

TASK 73-21-50-400-027-A-01
Installation of the CJ12L Harness

1. Reason for the Job
This TASK is applicable for /P, /3 and /3 PIP engines
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	PLIERS - CONNECTOR, JAW, SOFT
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 53 and 47 lbf.in (0.60 and 0.53 m.daN )
No specific	Torque wrench: range to between 160 and 140 lbf.in (1.81 and 1.58 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2101)	graphite grease
(Material No.CP8001)	lockwire 0.032 in. (0.8 mm) dia.
(Material No.CP8002)	lockwire 0.032 in. (0.8 mm) dia

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 73-29-00-710-040-B-02	Operational Test of the FADEC on the Ground (with Engine Non motoring)
TASK 78-30-00-081-041-B	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
CJ12L Harness (/P, /3 and /3 PIP engines) SAC

3. Job Set-up
Subtask 73-21-50-860-086-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).

Subtask 73-21-50-010-170-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(4) Make sure that the left thrust reverser door is open (Ref. AMM TASK 78-36-00-010-040):
(5) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(6) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 73-21-50-040-128-A ** ON A/C NOT FOR ALL

C. Make sure that the thrust reverser is unserviceable (Ref. AMM TASK 78-30-00-481-041).

4. Procedure
Subtask 73-21-50-420-108-A ** ON A/C NOT FOR ALL

A. Installation of the CJ12L Harness

CAUTION: CAREFULLY ALIGN THE CONNECTOR KEY WITH THE RECEPTACLE KEYWAY BEFORE YOU CONNECT THEM TO PREVENT DAMAGE TO THE CONNECTORS.

CAUTION: DISTRIBUTE THE SLACK ALL ALONG THE CABLE. DO NOT LET THE CABLE SHEATH TOUCH THE ADJACENT COMPONENTS. DO NOT TWIST THE SHEATH BY MORE THAN 180 DEGREES.

(1) Remove the CAP-BLANKING from each electrical connector and receptacle.
(2) Make sure that all the electrical connections are clean and in the correct condition.
(3) Set the CJ12L harness (10) in position on the core engine.
(4) Connect the CJ12L harness to the VBV position sensor CH. B, the VSV position sensor CH. B and the TBV position sensor CH. B.
(5) Fully tighten the coupling rings of the connectors by hand. Use PLIERS - CONNECTOR, JAW, SOFT only is necessary.
(6) Engage the CJ12L harness bulkhead connector (150) in the 6 o'clock junction box. Install the nut (160) to attach the connector (150) (Detail B).
(7) TORQUE the nut (160) to between 160 and 140 lbf.in (1.81 and 1.58 m.daN )

.
(8) Safety the nut (160) of the CJ12L bulkhead connector (150) together with the nuts of the two adjacent bulkhead connectors (CJ11L and CJ13) with CP8001lockwire 0.032 in. (0.8 mm) dia. or CP8002lockwire 0.032 in. (0.8 mm) dia.
(9) Connect the HJ12 connector to the CJ12L bulkhead connector (150) in the 6 o'clock junction box. . Use PLIERS - CONNECTOR, JAW, SOFT only if necessary.
(10) Make sure that the connectors are fully engaged and do not move.
(11) Lubricate the threads of the bolts with graphite grease (Material No.CP2101) .
(12) Install clamps (20), (40) and (120) on the CJ12L harness.
(13) Install the CJ12L harness (10) as follows:

INSTALL	ON	NOTE
Clamp (40) Bolt (50)	Bracket (60)	On the VBV fuel gear motor, at the 9 o'clock position (Detail E)
Bolt (130)	Bracket (140)	Onthe fan frame, at the 8:30 o'clock position (Detail D)
Clamp (20) Bolt (30)	The fan frame	At the 7:45 o'clock position (Detail C)
Clamp (120) Bolt (110) Nut (70)	Bracket (90), clamps (80) and (100) on CJ11L harness	On the core engine, at the 7 o'closk position (Detail F)

(14) Make sure that the CJ12L is not stressed, and TORQUE the bolts (30), (50), (130) and nut (70) to between 53 and 47 lbf.in (0.60 and 0.53 m.daN )

Subtask 73-21-50-710-085-A ** ON A/C NOT FOR ALL

B. Do a FADEC ground test with engine non motoring (Ref. AMM TASK 73-29-00-710-040).

5. Close-up
Subtask 73-21-50-410-132-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the left thrust reverser door (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL
(b) FOR [1000EM2] (ENGINE-2)
461AL

Subtask 73-21-50-440-091-A ** ON A/C NOT FOR ALL

B. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041).

Subtask 73-21-50-410-133-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:58:45 UTC