Removal of the Modem Processor Unit / Remote Modem Unit (RMU)

TASK 23-36-31-000-801-A
Removal of the Modem Processor Unit / Remote Modem Unit (RMU)

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 220
ZONE: 230
FIN: 99MH ** 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	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	STEPLADDER 1.0 M (3.3 FT)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
220	FWD CAB UTILITY AREAS
230	FWD PASSENGER COMPARTMENT

C. Referenced Information

REFERENCE	DESIGNATION
TASK 23-36-23-000-802-A	Removal of the Seat Power Box/Unit / Overhead Distribution Box
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)
Remote Modem Unit

3. Job Set-up
Subtask 23-36-31-861-050-A ** ON A/C NOT FOR ALL

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

Subtask 23-36-31-865-054-A ** ON A/C NOT FOR ALL

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2000VU	IFE-IFEC-AC	22MK	C04
** ON A/C NOT FOR ALL
2000VU	IFE-VCC-AC	21MH	C02
2000VU	IFE-VCC-DC	20MH	C01
2000VU	WAP	27MH	D07
** ON A/C NOT FOR ALL
2000VU	IFE-IFEC-AC	22MK	C06

Subtask 23-36-31-010-051-C ** ON A/C NOT FOR ALL

C. Get Access

Remote Modem Unit ** ON A/C NOT FOR ALL

(1) Put a STEPLADDER 1.0 M (3.3 FT) below the left Overhead Stowage Compartment (OHSC) between frames FR20 and FR21.
(2) Open the access doors of the overhead stowage compartment and the Video Control Center (VCC) (1).
(3) Remove the closeout panel (2):
(a) Release the fasteners (3) and hold the closeout panel (2).
(b) Remove the nut (6), washers (5), screw (7) and bonding strap (4).
(c) Safety the bonding strap (4) in the VCC (1).
(d) Remove the closeout panel (2).
(4) Remove the Seat Power Box/Unit / Overhead Distribution Box (36MH), if necessary (Ref. AMM TASK 23-36-23-000-802).

4. Procedure
Subtask 23-36-31-020-051-D ** ON A/C NOT FOR ALL

A. Removal of the Remote Modem Unit (RMU)

Remote Modem Unit ** ON A/C NOT FOR ALL

(1) Release the spring latches (10) and disconnect the electrical connector (11) from the receptacle (14).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Safety the blanking cap with the spring latches (10).

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTOR(S) IS(ARE) DISCONNECTED BEFORE YOU DISCONNECT THE BONDING STRAP(S).

(4) Remove the nut (13) and the bonding strap (12) from the RMU grounding stud (16).
(5) Hold the RMU (8) and release the fasteners (9).
(6) Carefully remove the RMU (8) from the RMU mounting bracket (15).

[Rev.10 from 2021] 2026.03.31 23:14:36 UTC