Installation of the CJ12R Harness for SAC Engines [CFMB]

TASK 73-21-50-400-028-A
Installation of the CJ12R Harness for SAC Engines

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
This task is applicable for SAC 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 110 and 100 lbf.in (1.24 and 1.13 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2101)	graphite grease

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 72-23-00-400-027-A	Installation of the Fan Duct Panels
TASK 73-29-00-710-040-B	Operational Test of the FADEC on the Ground (with Engine Motoring)
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
TASK 78-36-00-410-040-B	Closing of the Thrust Reverser Doors
CJ12R Harness

3. Job Set-up
Subtask 73-21-50-860-070-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 73-21-50-010-117-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):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the right thrust reverser door is open (Ref. AMM TASK 78-36-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 73-21-50-040-081-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 73-21-50-420-066-A ** ON A/C NOT FOR ALL

A. Installation of the CJ12R 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 CJ12R harness in position on the core engine.
(4) Engage the CJ12R harness (10) and the CJ11R harness (80) in their common recess of the fan frame, at the 4:30 o'clock position.
(5) Connect the CJ12R harness to the T25 temperature sensor CH. B, the BSV switch CH. B (PRE CFMI SB 73-0114), the HPTACC valve position sensor CH. B, the LPTACC valve position sensor CH. B. Use PLIERS - CONNECTOR, JAW, SOFT only if necessary.

NOTE: CFMI 5B SB 73-0114 deleted the BSV system.

(6) Connect the CJ11R harness to the T25 temperature sensor, CH.A.
(7) Make sure that the connectors are fully engaged and do not move.
(8) Lubricate the threads of the bolts with graphite grease (Material No.CP2101) , before installation.
(9) Install the parts which attach the CJ12R harness as follows:

INSTALL	ON	NOTE
Bolts (50) and (60) Clamp (40)	6 o'clock junction box	On the right-hand side of the 6 o'clock junction box (ALF) (Detail E)
Bolt (70)	Fan frame	At the 4:30 o'clock position (Section F-F)
Bolt (90) Clamp (100)	Bracket (110) on the fan frame	At the 4:15 o'clock position (Detail D)
Bolt (20)	Bracket (30) on the fan frame	At the 3:30 o'clock position (Detail C)
Bolt (20)	Bracket (30) on the fan frame	At the 3:30 o'clock position (Detail C)
Bolt (130)	Bracket (120) on the fan frame	At the 3 o'clock position (Detail B)

(10) Make sure that the CJ12R harness is not stressed and TORQUE the bolts (20), (50), (60), (90), (130) to between 53 and 47 lbf.in (0.60 and 0.53 m.daN )

.
(11) TORQUE the bolt (70) to between 110 and 100 lbf.in (1.24 and 1.13 m.daN )

.
(12) Connect the HJ12 harness to the CJ12R harness bulkhead connector in the 6 o'clock junction box. Use PLIERS - CONNECTOR, JAW, SOFT only if necessary.
(13) Install the fan duct panel between struts No. 5 and No. 6 (Ref. AMM TASK 72-23-00-400-027).

Subtask 73-21-50-710-066-A ** ON A/C NOT FOR ALL

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

5. Close-up
Subtask 73-21-50-410-085-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 right thrust reverser doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
452AR
(b) FOR [1000EM2] (ENGINE-2)
462AR

Subtask 73-21-50-440-075-A ** ON A/C NOT FOR ALL

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

Subtask 73-21-50-410-099-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 02:58:46 UTC