Installation of the Satellite Data Unit (SDU)

TASK 23-28-34-400-001-A
Installation of the Satellite Data Unit (SDU)

ZONE: 128
FIN: 105RV1 ** 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 2M (6 FT) - ADJUSTABLE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
128	REAR AVIONIC COMPARTMENT
824

C. Referenced Information

REFERENCE	DESIGNATION
TASK 23-28-00-600-002-A	Uploading of the USER ORT Part of the SATCOM Software
TASK 23-28-00-740-001-A	BITE Test of the Satellite Communication System
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)
Satellite Data Unit

3. Job Set-up
Subtask 23-28-34-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at the access door 824.
(3) Make sure that the access door 824 is open.

Subtask 23-28-34-865-063-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
121VU	SATCOM	102RV1	K01

4. Procedure
Subtask 23-28-34-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the SDU
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Remove the CAP-BLANKING from each electrical connector and receptacle.
(4) Make sure that all the electrical connections are clean and in the correct condition.
(5) Install the SDU (1) on its rack (3).
(6) Push the SDU (1) on its rack (3) to connect the electrical connector (2).
(7) Engage the nuts (4) on the lugs (5) and tighten.

Subtask 23-28-34-865-069-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
121VU	SATCOM	102RV1	K01

Subtask 23-28-34-610-050-D ** ON A/C NOT FOR ALL

C. Do the uploading procedure of the SDU (Ref. AMM TASK 23-28-00-600-002).

Subtask 23-28-34-740-050-A ** ON A/C NOT FOR ALL

D. Do the BITE test of the SATCOM system (Ref. AMM TASK 23-28-00-740-001).

5. Close-up
Subtask 23-28-34-410-050-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 824.
(3) Remove the access platform(s).

[Rev.9 from 2019] 2026.04.02 06:12:03 UTC