Installation of the HJ12 Harness for SAC Engines [CFMB]

TASK 73-21-50-400-045-A
Installation of the HJ12 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 )

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 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
HJ12 Harness

3. Job Set-up
Subtask 73-21-50-860-068-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 73-21-50-010-137-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 thrust reverser doors are open (Ref. AMM TASK 78-36-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 73-21-50-040-091-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 73-21-50-420-073-A ** ON A/C NOT FOR ALL

A. Installation of the HJ12 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) Install the HJ12 harness in position on the fan frame.
(4) Connect the HJ12 harness to the CJ12R and CJ12L harness bulkhead connectors in the 6 o'clock tube bundle junction box, and to the ECU (receptacle J12). Use PLIERS - CONNECTOR, JAW, SOFT only if necessary.
(5) Make sure that the connectors are fully engaged and do not move.
(6) Make sure that the harness is not stressed.
(7) Engage the HJ12 harness in the flexible clamp (240), on fan frame between flange E and flange F at the 5 o'clock position (Detail D).
(8) Engage the HJ12 harness in the flexible clamp (40), on fan frame between flange E and flange F at the 5:45 o'clock position (Detail E).
(9) Engage the HJ12 harness in the flexible clamps (190), (80), (120) on TGB (Details F, G, H).
(10) Engage the HJ12 harness in the clip assembly (100) on the No. 7 strut (3 locations) (Detail J).
(11) Lubricate the threads of the bolts with graphite grease (Material No.CP2101) .
(12) Install the parts which attach the HJ12 harness as follows:

INSTALL	ON	NOTE
Plates (250) Bolts (220) Nuts (230)	Bracket assembly (210)	On fan frame between flange E and flange F at the 5 o'clock position (Detail D)
Cover plate (50) Bolts (20)	Clamp (10) on bracket (30)	On fan frame between flange E and flange F at the 5:45 o'clock position (Detail E)
Cover plate (200) Bolts (170)	Bracket (180)	On TGB right-hand side (Detail F)
Cover plate (70) Bolts (60)	Bracket (90)	On TGB right-hand side (Detail G)
PRE SB CFM56-5 72-079 Cover plate (150) Bolts (160)	Bracket (110) with Clamp (130) and bracket (140)	On TGB rear face (Detail H)
POST SB CFM56-5 72-079 Cover plate (150) Bolts (160)	Bracket (110) with bracket (140)	On TGB rear face (Detail H)
Clamp (280) Bolt (270) Nut (260) END OF SB CFM56-5 72-079	Bracket (290)	On TGB rear face (Detail H)

PRE SB CFM56-5 72-079
(13) TORQUE the nuts (230) and bolts (20), (60), (160), (170) to between 53 and 47 lbf.in (0.60 and 0.53 m.daN )

.

POST SB CFM56-5 72-079
(14) TORQUE the nuts (230), (260) and bolts (20), (60), (160), (170) to between 53 and 47 lbf.in (0.60 and 0.53 m.daN )

.
END OF SB CFM56-5 72-079

Subtask 73-21-50-710-073-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 73-21-50-410-092-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 thrust reverser doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 73-21-50-440-082-A ** ON A/C NOT FOR ALL

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

Subtask 73-21-50-410-110-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 02:59:05 UTC