Removal of the Low Earth Orbit (LEO) Antenna/Satellite Data Unit (SDU) Coaxial Cable

TASK 23-28-43-000-802-A
Removal of the Low Earth Orbit (LEO) Antenna/Satellite Data Unit (SDU) Coaxial Cable

FIN: 1044RV ** 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	1	ACCESS PLATFORM 3M (10 FT)
No specific	AR	CAP - BLANKING
No specific	1	STEPLADDER 1.5 M (5 FT)

B. 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 25-23-41-000-001-A	Removal of the Ceiling Panels
TASK 25-23-43-000-001-A	Removal of the Upper Sidewall Panel
TASK 25-23-44-000-001-A	Removal of the Lower Sidewall Panels (Dado Panels)
TASK 25-54-11-000-001-A	Removal of the Forward Cargo-Compartment Partition FR24A
TASK 23-28-00-00-04	SATELLITE COMMUNICATION - DESCRIPTION AND OPERATION
Coaxial Cable

3. Job Set-up
Subtask 23-28-43-860-053-A ** ON A/C NOT FOR ALL

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

Subtask 23-28-43-865-053-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and tag(s) and close this (these) circuit breaker(s) (circuit breaker(s) with dark-gray extension caps):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	SATCOM	240RV	K01

Subtask 23-28-43-010-052-A ** ON A/C NOT FOR ALL

C. Get Access

WARNING: YOU MUST MAKE SURE THAT YOU CAN HOLD THE COMPONENT BEFORE YOU REMOVE/INSTALL IT. THE COMPONENT IS HEAVY. IF IT FALLS, IT CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.

(1) In the cabin:
(a) For the location of this component, refer to paragraph Component Location
(Ref. AMM D/O 23-28-00-00).
(b) Put the STEPLADDER 1.5 M (5 FT) in position below the applicable ceiling panel.
(c) Remove the applicable ceiling panels (Ref. AMM TASK 25-23-41-000-001).
(d) Remove the applicable upper sidewall-panel(s) (Ref. AMM TASK 25-23-43-000-001).
(e) Remove the applicable lower sidewall-panels (Ref. AMM TASK 25-23-44-000-001).
(2) In the forward cargo compartment:
(a) Put the ACCESS PLATFORM 3M (10 FT) in position at access door 825 in zone 130.
(b) Open access door 825.
(c) Remove sidewall panel 131CW (Ref. AMM TASK 25-54-11-000-001).

4. Procedure
Subtask 23-28-43-020-051-A ** ON A/C NOT FOR ALL

A. Removal of the Coaxial Cable

Coaxial Cable ** ON A/C NOT FOR ALL

CAUTION: BE CAREFUL NOT TO BEND THE DISCONNECTED COAXIAL CABLES OR WALK ON THEM. IF YOU DO NOT OBEY THIS INSTRUCTION, YOU CAN CAUSE DAMAGE TO THE CABLES.

(1) In the cabin:
(a) Disconnect the coaxial connector (2):

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

1 Remove and discard the lockwire (3) from the coaxial connector (2).
2 Disconnect the coaxial connector (2) from LEO passive antenna 1016RV1 (4).
3 Put a CAP - BLANKING on the coaxial receptacle of the LEO passive antenna (4) and on the coaxial connector (2) of the coaxial cable (1).
(b) Remove the coaxial cable (1):
1 Remove and discard the tie wrap (5) from the supports (7) and (9).
2 Remove the bobbin (6) from the supports (7) and (9).
3 Remove the bobbin (6) from the coaxial cable (1).
4 Remove the coaxial cable (1).
(2) In the cargo compartment:
(a) Disconnect the coaxial connector:
1 Disconnect the coaxial connector from the LEO Satellite Data Unit (SDU).
2 Put a CAP - BLANKING on the coaxial receptacle of the LEO SDU and on the coaxial connector (2) of the coaxial cable (1).
(b) Remove the coaxial cable (1):
1 Remove and discard the tie wrap (5) from the supports (8) and (10), and from the cable (12).
2 Remove the bobbin (6) from the supports (8) and (10).
3 Remove the bobbin (6) from the coaxial cable (1).
4 Remove and discard the tie wrap (5) from the supports (7) and (11).
5 Remove the bobbin (6) from the supports (7) and (11).
6 Remove the bobbin (6) from the coaxial cable (1).
7 Remove and discard the tie wrap (5) from the cable (12).
8 Remove the bobbin (6) from the coaxial cable (1).
9 Remove the coaxial cable (1).

[Rev.10 from 2021] 2026.04.02 06:12:03 UTC