Installation of the Weather-Radar Control Unit

TASK 34-41-12-400-001-A
Installation of the Weather-Radar Control Unit

ZONE: 210
FIN: 3SQ

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

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD

B. Referenced Information

REFERENCE	DESIGNATION
TASK 34-41-00-740-002-A	BITE Test of the Weather Radar
Weather-Radar Control Unit ** ON A/C NOT FOR ALL
Weather-Radar Control Unit ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 34-41-12-865-051-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	COM NAV/RADAR/1	5SQ1	K13
** ON A/C NOT FOR ALL
121VU	COM NAV/RADAR/2	5SQ2	K14

4. Procedure
Subtask 34-41-12-420-052-C ** ON A/C NOT FOR ALL

A. Installation of the Weather-Radar Control Unit
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Remove the CAP-BLANKING from each electrical connector and receptacle.

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.

(5) Make sure that all the electrical connections are clean and in the correct condition.
(6) Connect the electrical connector(s) (4) to the receptacle(s) (3) of the weather-radar control unit (2).
(7) Install the weather-radar control unit (2) in its housing (5).
(8) Tighten the four quarter-turn fasteners (1).
(9) If applicable, install a DEACT sticker near position 2 of the activation switch.

Subtask 34-41-12-420-052-G ** ON A/C NOT FOR ALL

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.

(5) Make sure that all the electrical connections are clean and in the correct condition.
(6) Connect the electrical connector(s) (4) to the receptacle(s) (3) of the weather-radar control unit (2) as follows:
- Connect electrical connector 3SQA to receptacle J1.
- Connect electrical connector 3SQB to receptacle J2.
(7) Install the weather-radar control unit (2) in its housing (5).
(8) Tighten the four quarter-turn fasteners (1).
(9) If applicable, install a DEACT sticker near position 2 of the activation switch.

Subtask 34-41-12-865-052-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
121VU	COM NAV/RADAR/1	5SQ1	K13
** ON A/C NOT FOR ALL
121VU	COM NAV/RADAR/2	5SQ2	K14

Subtask 34-41-12-740-050-A

C. Do the BITE test of the weather radar system
(Ref. AMM TASK 34-41-00-740-002).

5. Close-up
Subtask 34-41-12-860-050-A

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

[Rev.10 from 2021] 2026.04.01 04:40:05 UTC