Installation of the CJ12R Harness [CFMI]

TASK 73-21-50-400-004-A
Installation of the CJ12R Harness

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

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	PLIERS - JAWED, SOFT
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 51 and 45 lbf.in (0.58 and 0.51 m.daN )
No specific	Torque wrench: range to between 51 and 47 lbf.in (0.58 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, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 72-23-00-400-005-A	Installation of the Fan Duct Panels
TASK 73-29-00-710-040-A-02	Operational Test of the FADEC on the Ground (with Engine non Motoring)
TASK 78-30-00-081-041-A	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-A	Closing of the Thrust Reverser Doors
CJ12R Harness

3. Job Set-up
Subtask 73-21-50-860-075-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 73-21-50-010-073-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)
452AR
(b) FOR [1000EM2] (ENGINE-2)
462AR

Subtask 73-21-50-040-057-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 73-21-50-420-094-B ** ON A/C NOT FOR ALL

A. Installation of the CJ12R Harness
(1) Installation of the Harness Junction Box
(a) Remove the caps from the connectors, and set the harness in position.
(b) Attach the harness junction box to the bracket at the 3 o'clock location on the fan frame center hub, with 2 bolts (39), the threads lightly lubricated with graphite grease (Material No.CP2101) and the nuts (37) (detail H). Tighten the bolts by hand.

PRE SB 72-021

(2) Install the CJ12R receptacle on the 6 o'clock junction box, and attach the receptacle flange with 2 bolts (27), the threads lubricated with graphite grease (Material No.CP2101) , and nuts (26) (detail A). Tighten the bolts by hand.

POST SB 72-021

(3) Install the CJ12R receptacle on the 6 o'clock junction box, and attach the receptacle flange with 2 bolts (27), the threads lubricated with graphite grease (Material No.CP2101) (detail A). Tighten the bolts by hand.

END OF SB 72-021

(4) Connect the electrical connectors:

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.

(a) Connect the harness to the T25 temperature sensor. Attach the receptacle flange to the fan frame center hub at the 5 o'clock location with bolt (3), threads lightly lubricated with graphite grease (Material No.CP2101) (detail B). Tighten the bolt by hand.
(b) Connect the J12 harness connector to the CJ12R receptacle in the 6 o'clock junction box, as follows:
1 Engage the connector in the related receptacle, and turn knurled coupling ring by hand until full engagement.
2 Tighten the coupling ring with PLIERS - JAWED, SOFT.
3 Make sure that the connector is fully engaged and does not move.
4 If necessary, do the above steps again.

PRE SB CFM56-5 75-031
(5) Connect the harness to the LPTACC valve position sensor (channel B), the HPTACC valve position sensor (channel B) and the RACC valve position sensor (channel B).

POST SB CFM56-5 75-031
(6) Connect the harness to the LPTACC valve position sensor (channel B) and the HPTACC valve position sensor (channel B).
END OF SB CFM56-5 75-031
(7) Install the loop clamps on the electrical harness. Attach the clamps with bolts, the threads lightly lubricated with graphite grease (Material No.CP2101) . Tighten the bolts by hand on the items which follow:
(a) The air scoop forward bracket at the 4 o'clock location on the fan frame center hub (detail C).

PRE SB CFM56-5 75-031
(b) The bracket at the 3 o'clock location on the core engine (detail D), with nut (31)

PRE SB CFM56-5 72-279
(c) The bracket at the 2 o'clock location on the core engine (detail E).

POST SB CFM56-5 72-279
(d) The brackets at the 2 o'clock location on the core engine (detail E and F), with nuts (35) and (13).
END OF SB CFM56-5 72-279

POST SB CFM56-5 75-031
(e) Not applicable
END OF SB CFM56-5 75-031
(8) Make sure that the harness is not stressed, and TORQUE the bolts as follows:
(a) TORQUE the bolts (39) which attach the harness junction box to between 51 and 47 lbf.in (0.58 and 0.53 m.daN )

.
(b) TORQUE the bolts (27) which attach the receptacle flange to the 6 o'clock junction box to between 51 and 45 lbf.in (0.58 and 0.51 m.daN )

.
(c) TORQUE the bolt (3) which attaches the receptacle flange to the fan frame center hub to between 110 and 100 lbf.in (1.24 and 1.13 m.daN )

.

PRE SB CFM56-5 75-031
(d) TORQUE the bolts (28), (32), (33), (11), which attach the clamps to between 51 and 47 lbf.in (0.58 and 0.53 m.daN )

.

POST SB CFM56-5 75-031
(e) TORQUE the bolts (28) which attach the clamps to between 51 and 47 lbf.in (0.58 and 0.53 m.daN )

.
END OF SB CFM56-5 75-031
(9) Re-install the fan duct panel over the T25 sensor (Ref. AMM TASK 72-23-00-400-005).

Subtask 73-21-50-942-071-A ** ON A/C NOT FOR ALL

B. Remove the WARNING NOTICE(S).

Subtask 73-21-50-861-053-A ** ON A/C NOT FOR ALL

C. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).

Subtask 73-21-50-710-053-A ** ON A/C NOT FOR ALL

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

5. Close-up
Subtask 73-21-50-862-053-A ** ON A/C NOT FOR ALL

A. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

Subtask 73-21-50-410-053-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the right thrust reverser door (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
452AR
(b) FOR [1000EM2] (ENGINE-2)
462AR

Subtask 73-21-50-440-053-A ** ON A/C NOT FOR ALL

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

Subtask 73-21-50-410-068-A ** ON A/C NOT FOR ALL

D. 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

[Rev.10 from 2021] 2026.04.01 13:05:00 UTC