Removal of the J9 Harness [CFMI]

TASK 73-21-50-000-008-A
Removal of the J9 Harness

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

1. Reason for the Job
This harness connects the Electronic Control Unit (ECU) to the N1 speed sensor, the control alternator, the pneumatic starter valve and the T12 sensor.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	CAP - BLANKING
No specific	AR	WARNING NOTICE(S)

B. 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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
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
J9 Harness

3. Job Set-up
Subtask 73-21-50-941-057-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 73-21-50-010-057-A ** ON A/C NOT FOR ALL

B. Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 73-21-50-040-064-A ** ON A/C NOT FOR ALL

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

Subtask 73-21-50-010-080-A ** ON A/C NOT FOR ALL

D. Open the thrust reverser doors (Ref. AMM TASK 78-36-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR

4. Procedure
Subtask 73-21-50-020-053-A ** ON A/C NOT FOR ALL

A. Removal of the J9 Harness
(1) Disconnect the electrical harness from the T12 sensor, the starter valve, the control alternator and the N1 speed sensor.

PRE SB 72-169

(2) Remove the 2 bolts (10) and nuts (20) which attach the cover plate (30) to the brackets at the 5 o'clock location on flanges G and E (detail A). Pull out the flexible clamp assembly and remove the J9 harness from the flexible clamp (40). Re-install the clamp assembly.

POST SB 72-169

(3) Remove the 2 bolts (10) and nuts (20) which attach the cover plate (30) to the brackets at the 5 o'clock location on flanges G and E (detail A), with clamp (50) of J15 harness. Pull out the flexible clamp assembly and remove the J9 harness from the flexible clamp (40). Re-install the clamp assembly.

END OF SB 72-169

(4) Remove the bolt (150) which attach the J10 and J9 harnesses to the same bracket (detail E).
(5) Remove the 2 bolts (60) which attach the cover plate (80) to the right leg of the bracket at the 5:30 o'clock location between flanges E and G (detail B). Remove the clamp assembly and remove the J9 harness from the flexible clamp (70). Re-install clamp assembly.

PRE SB 72-232

(6) Remove the 2 bolts (90) which attach the cover plate (100) to the right bracket of the Transfer Gearbox (TGB) (detail C). Remove the cover plate and remove the J9 harness from the flexible clamp (110).

POST SB 72-232

(7) Remove the 2 bolts (90) and washers (120) which attach the cover plate (100) to the right bracket on the TGB (detail C). Remove the cover plate and remove the J9 harness from the flexible clamp (110).

END OF SB 72-232

(8) Remove the bolt (130) which attaches the J9 and J10 harness clamps (140) to the bracket on flange H at the 5:30 o'clock location (detail D).
(9) Remove the bolts which attach the J9 harness clamps to the following:
(a) The bracket on flange D at the 5 o'clock location (detail F).

PRE SB 72-549

(b) The bracket on flange D at the 5:30 o'clock location (detail G).

POST SB 72-549

(c) The bracket on flange D at the 5:30 o'clock location (detail G), with nut (210).

END OF SB 72-549

(d) The bracket on the drain tube at the 6.00 o'clock location (detail H), with nut (230).
(10) Remove the bolts which attach the J9 harness clamp to the following:
(a) The bracket on flange B at the 5 o'clock location (detail J), with J10 clamp.
(b) The bracket on flange B at the 4:45 o'clock location (detail K), with J10 clamp and nut (280).
(c) The bracket on flange B at the 4.15 o'clock location (detail L), with nut (310).
(d) The bracket on flange B at the 4 o'clock location (detail M), with nut (340).

PRE SB 72-098

(e) The lower end of bracket on flange B at the 3:30 o'clock location (detail N), with nut (400), bolt (390).
(f) The upper end of bracket on flange B at the 3:30 o'clock location (detail N), with J10 clamp and nut (370), bolt (360).

POST SB 72-098

(g) Remove the J9 harness from the clip on the bracket on flange B at the 3:30 o'clock location (detail N).
(h) The upper end of bracket on flange B at the 3:30 o'clock location (detail N), with J10 clamp and nut (370), bolt (360).

END OF SB 72-098

(i) The bracket on flange D at the 3:30 o'clock location (detail P), with J10 clamp.
(11) Remove the bolts which attach the J9 and J10 clamps to the following:

PRE SB 72-124

(a) The bracket on flange B at the 2:30 o'clock location (detail Q).
(b) Not applicable.
(c) The bracket on flange B at the 2:00 o'clock location (detail S).

POST SB 72-124

(d) The bracket on flange B at the 3:00 o'clock location (detail Q).
(e) The bracket on flange B at the 2:30 o'clock location (detail R), with nut (470).
(f) The bracket on flange B at the 2:00 o'clock location (detail S).

END OF SB 72-124

(g) The bracket on flange B at the 1:30 o'clock location (detail T).
(h) The bracket on flange B at the one o'clock location (detail U).
(12) Remove J9 harness.
(13) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(14) Remove all the clamps from the harness.

[Rev.10 from 2021] 2026.04.01 02:56:25 UTC