Failure of the Weather Radar Antenna (System 1)

TASK 34-41-00-810-810-A
Failure of the Weather Radar Antenna (System 1)

1. Possible Causes

XCVR-WEATHER RADAR, 1 [1SQ1]
DRIVE-WR ANTENNA [7SQ]
wiring between the WR antenna drive (7SQ) and the weather radar transceiver 1 (1SQ1)

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 34-41-00-740-002	BITE Test of the Weather Radar
ASM 344101
AMM 34-41-11-000-004	Removal of the Weather-Radar Antenna Assembly
AMM 34-41-11-400-005	Installation of the Weather-Radar Antenna Assembly
AMM 34-41-33-000-004	Removal of the Weather Radar Transceiver
AMM 34-41-33-000-802	Removal of the Weather Radar Transceiver
AMM 34-41-33-400-003	Installation of the Weather Radar Transceiver
AMM 34-41-33-400-802	Installation of the Weather Radar Transceiver

3. Fault Confirmation
Subtask 34-41-00-740-066-A

A. Test
(1) Do the BITE test of the weather radar AMM 34-41-00-740-002.

4. Fault Isolation
Subtask 34-41-00-810-062-A ** ON A/C NOT FOR ALL

A. If the BITE test gives the maintenance message RADAR 1 ANTENNA:

(1) If the fault continues:

(a) If the fault continues:

do a check and repair the wiring between the WR antenna drive (7SQ) and the weather radar transceiver 1 (1SQ1) ASM 344101.

Subtask 34-41-00-810-062-E ** ON A/C NOT FOR ALL

A. If the BITE test gives the maintenance message WXR ANTENNA (11SQ):

(1) If the fault continues:

(a) If the fault continues:

do a check and repair the wiring between the WR antenna drive (7SQ) and the weather radar transceiver 1 (1SQ1) ASM 344101.

Subtask 34-41-00-740-067-A

B. Do the test given in Para. 3.

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