Installation of the Maintenance-Interphone Jack Harness

TASK 23-44-41-400-803-A
Installation of the Maintenance-Interphone Jack Harness

WARNING: WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

ZONE: 210
ZONE: 410
ZONE: 420
ZONE: 430
ZONE: 440

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

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 27 and 24 lbf.in (0.31 and 0.27 m.daN )
No specific	Torque wrench: range to between 35 and 31.5 lbf.in (0.40 and 0.36 m.daN )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
410	ENG 1 PYLON BOX AND FORWARD FAIRING
420	ENG 2 PYLON BOX AND FORWARD FAIRING
430	ENG 1 AIR INTAKE, FAN AND ACCESS GEARBOX
440	ENG 2 AIR INTAKE, FAN AND ACCESS GEARBOX
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 23-44-00-700-001-A	Operational Test of the Service Interphone
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors
Maintenance-Interphone Jack Harness

3. Job Set-up
Subtask 23-44-41-860-067-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Make sure that the WARNING NOTICE(S) is/are in position to tell persons not to operate:

The ENG/MODE selector switch
The ENG/MASTER 1(2) control switch.

(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Make sure that the WARNING NOTICE(S) is/are in position to tell persons not to energize FADEC 1(2).

Subtask 23-44-41-865-070-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 101RH (DIRCIDS, 1)
49VU	AIR COND/CIDS/SDF/DIR1 ESS	15WH	C05
49VU	COM/CIDS/DIR ESS/1	150RH	G01
121VU	COM NAV/CIDS/DIR NORM/1	151RH	M05
122VU	AIR COND/CIDS/SDF/DIR NORM/1	17WH	T17
FOR FIN: 102RH (DIRCIDS, 2)
49VU	AIR COND/CIDS/SDF/DIR2 ESS	18WH	C06
49VU	COM/CIDS/DIR ESS/2	157RH	G02
49VU	COM/CIDS/DIR ESS/1	150RH	G01
121VU	COM NAV/CIDS/DIR NORM/2	156RH	M06
121VU	COM NAV/CIDS/DIR NORM/1	151RH	M05
122VU	AIR COND/CIDS/SDF/DIR NORM/2	14WH	T18

Subtask 23-44-41-010-056-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR.
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.

4. Procedure

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

Subtask 23-44-41-420-058-A ** ON A/C NOT FOR ALL

A. Installation of the Maintenance-Interphone Jack Harness

Maintenance-Interphone Jack Harness ** ON A/C NOT FOR ALL

(1) Do a visual inspection of the component interface and/or the adjacent area.
(2) Remove the CAP - BLANKING from the maintenance-interphone jack harness (1).
(3) Install the maintenance-interphone jack harness (1) on the interphone disconnect panel with the four screws (3) and the four washers (2).
(4) Tighten the screws (3) manually.
(5) Connect the pylon harness to the maintenance-interphone jack harness (1) (4107VC).
(6) Attach the maintenance-interphone jack harness (1) to the mounting plate (6).
(7) Install the maintenance-interphone jack harness (1) (4000RJ) and the mounting plate (6) on the interphone bracket with the four screws (7).
(8) TORQUE the four screws (7) to between 35 and 31.5 lbf.in (0.40 and 0.36 m.daN )

.
(9) For configuration 1:
(a) Attach the interphone jack harness (1) to the door as follows:
1 Attach the maintenance-interphone jack harness (1) to the brackets on the right fan cowl-door with the 12 clamps (4) and the 12 screws (5).
2 Adjust the maintenance-interphone jack harness (1) to keep the preload to a minimum.
3 TORQUE the screws (5) to between 35 and 31.5 lbf.in (0.40 and 0.36 m.daN )

.
(10) For configuration 2:
(a) Attach the maintenance-interphone jack harness (1) to the door as follows:
1 Attach the interphone jack harness (1) to the studs on the right fan cowl-door with the clamp (8), the 11 clamps (11), the 12 nuts (10) and the 12 washers (9).
2 Adjust the interphone jack harness (1) to keep the preload to a minimum.
3 TORQUE the nuts (10) to between 27 and 24 lbf.in (0.31 and 0.27 m.daN )

.
(11) Remove the CAP-BLANKING from each electrical connector and receptacle.
(12) Make sure that all the electrical connections are clean and in the correct condition.
(13) Connect the electrical connector to the pylon harness.
(14) Connect the electrical connector to the interphone bracket.

Subtask 23-44-41-865-071-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 101RH (DIRCIDS, 1)
49VU	AIR COND/CIDS/SDF/DIR1 ESS	15WH	C05
49VU	COM/CIDS/DIR ESS/1	150RH	G01
121VU	COM NAV/CIDS/DIR NORM/1	151RH	M05
122VU	AIR COND/CIDS/SDF/DIR NORM/1	17WH	T17
FOR FIN: 102RH (DIRCIDS, 2)
49VU	AIR COND/CIDS/SDF/DIR2 ESS	18WH	C06
49VU	COM/CIDS/DIR ESS/2	157RH	G02
49VU	COM/CIDS/DIR ESS/1	150RH	G01
121VU	COM NAV/CIDS/DIR NORM/2	156RH	M06
121VU	COM NAV/CIDS/DIR NORM/1	151RH	M05
122VU	AIR COND/CIDS/SDF/DIR NORM/2	14WH	T18

Subtask 23-44-41-710-057-A ** ON A/C NOT FOR ALL

C. Do the operational test of the service interphone (Ref. AMM TASK 23-44-00-700-001).

5. Close-up
Subtask 23-44-41-410-054-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl-doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.03.31 23:15:14 UTC