Removal of the Low Earth Orbit (LEO) Satellite Data Unit (SDU)

TASK 23-28-34-000-804-A
Removal of the Low Earth Orbit (LEO) Satellite Data Unit (SDU)

FIN: 1005RV1 ** 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	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
824

C. 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)
LEO SDU

3. Job Set-up
Subtask 23-28-34-861-052-A ** ON A/C NOT FOR ALL

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

Subtask 23-28-34-010-053-A ** ON A/C NOT FOR ALL

B. Get access to the avionics compartment.
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below access door 824.
(2) Open access door 824.

Subtask 23-28-34-865-070-A ** ON A/C NOT FOR ALL

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

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

4. Procedure
Subtask 23-28-34-040-050-A ** ON A/C NOT FOR ALL

A. Deactivation of the Data Modulator-Demodulator (Modem) International Mobile-Equipment Identifier, if necessary.
(1) To do the deactivation of the data-Modem international mobile-equipment identifier of the SDU, speak to the service provider.

Subtask 23-28-34-020-053-A ** ON A/C NOT FOR ALL

B. Removal of the LEO SDU
(1) Loosen and lower the nut (4).
(2) Pull the SDU (1) on its rack (3) and disconnect the electrical connectors (2).
(3) Remove the SDU (1) from its rack (3).
(4) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.

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