WR1 Test Inoperative

TASK 34-41-00-810-822-A
WR1 Test Inoperative

1. Possible Causes

XCVR-WEATHER RADAR, 1 [1SQ1]
LGCIU-2 [5GA2]
wiring of the GROUND AIR discrete from the LGCIU2 (5GA2) to the weather radar transceiver 1 (1SQ1)

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 32-31-71-000-001	Removal of the LGCIU
AMM 32-31-71-400-001	Installation of the LGCIU
ASM 344101
AMM 34-41-33-000-004	Removal of the Weather Radar Transceiver
AMM 34-41-33-400-003	Installation of the Weather Radar Transceiver

3. Fault Confirmation
Subtask 34-41-00-710-050-A

A. Test
Not applicable, the fault is evident.

4. Fault Isolation
Subtask 34-41-00-810-076-A

A. If you cannot start the WR1 test on the MCDU:

(1) If there is no ground:

(2) If there is ground:

(a) If there is still ground:

do a check and repair the wiring of the GROUND AIR discrete from the LGCIU2 (5GA2) to the weather radar transceiver 1 (1SQ1) ASM 344101.

[Rev.8 from Aug 2018] 2026.04.04 04:33:05 UTC