Installation of the ATC/TCAS Control Unit

TASK 34-52-12-400-001-A
Installation of the ATC/TCAS Control Unit

ZONE: 211
FIN: 3SH

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
211	COCKPIT

B. Referenced Information

REFERENCE	DESIGNATION
TASK 34-52-00-740-004-A	BITE Test of the Air Traffic Control (ATC)
ATC/TCAS Control Unit

3. Job Set-up
Subtask 34-52-12-865-051-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	COM NAV/ATC/1	5SH1	G11
** ON A/C NOT FOR ALL
121VU	COM NAV/ATC/2	5SH2	K07
** ON A/C NOT FOR ALL
121VU	T/TISS	2004SG	K07

4. Procedure
Subtask 34-52-12-420-050-A

A. Installation of the ATC/TCAS Control Unit (3SH)

NOTE: If the new ATC/TCAS control unit has some inoperative functions/modes, install the INOP labels that were on the removed ATC/TCAS control unit.

(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Remove the blanking caps from the electrical connectors (3) and (4).
(4) Make sure that the electrical connectors are clean and in the correct condition.
(5) Connect the electrical connectors (4) to the ATC/TCAS Control Unit (2).
(6) Install the ATC/TCAS Control Unit (2) in its housing (5).
(7) Tighten the four quarter-turn fasteners (1).

Subtask 34-52-12-865-052-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	COM NAV/ATC/1	5SH1	G11
** ON A/C NOT FOR ALL
121VU	COM NAV/ATC/2	5SH2	K07
** ON A/C NOT FOR ALL
121VU	T/TISS	2004SG	K07

Subtask 34-52-12-740-050-A

C. Do the BITE test of the ATC (Ref. AMM TASK 34-52-00-740-004).

5. Close-up
Subtask 34-52-12-860-050-A

A. Make sure that the work area is clean and clear of tools and other items.

[Rev.10 from 2021] 2026.04.01 06:03:16 UTC