Loss of the Maintenance Data Input Bus of the Weather Radar Transceiver 1

TASK 34-41-00-810-816-A
Loss of the Maintenance Data Input Bus of the Weather Radar Transceiver 1

1. Possible Causes

XCVR-WEATHER RADAR, 1 [1SQ1]
wiring of the MAINTENANCE DATA INPUT bus from the weather radar transceiver 1 (1SQ1) to the first terminal block

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 34-41-33-000-004	Removal of the Weather Radar Transceiver
AMM 34-41-33-400-003	Installation of the Weather Radar Transceiver

3. Fault Confirmation
Subtask 34-41-00-740-078-A

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

4. Fault Isolation
Subtask 34-41-00-810-068-A ** ON A/C NOT FOR ALL

A. If the BITE test gives the maintenance message RADAR 1 NO DATA FROM CFDIU:

(1) If the fault continues:

do a check and repair the wiring of the MAINTENANCE DATA INPUT bus from the weather radar transceiver 1 (1SQ1) to the first terminal block ASM 344101.

Subtask 34-41-00-810-068-B ** ON A/C NOT FOR ALL

A. If the BITE test gives the maintenance message CFDIU (1TW)/WXR1 (1SQ1):

(1) If the fault continues:

do a check and repair the wiring of the MAINTENANCE DATA INPUT bus from the weather radar transceiver 1 (1SQ1) to the first terminal block ASM 344101.

Subtask 34-41-00-740-079-A

B. Do the test given in Para. 3.

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