Result of the BITE Test of the Weather Radar 1 not Satisfactory on CAPT and F/O NDs/PFDs

TASK 34-41-00-810-840-A
Result of the BITE Test of the Weather Radar 1 not Satisfactory on CAPT and F/O NDs/PFDs

1. Possible Causes

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

3. Fault Confirmation
Subtask 34-41-00-740-118-A

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

4. Fault Isolation
Subtask 34-41-00-810-101-A

A. If the test gives the maintenance message DMC1/2/3(1WT1/2/3)/WXR1(1SQ1):
(1) Replace the XCVR-WEATHER RADAR, 1 [1SQ1] AMM 34-41-33-000-004 and AMM 34-41-33-400-003.
(2) If the fault continues:

do a check of the wiring between weather radar transceiver 1 (1SQ1) pins AB/2G, 3G and terminal block 1851VT38 pins J, D and between weather radar transceiver 1 (1SQ1) pins AB/2D, 3D and terminal block 1851VT39 pins D, J ASM 344101.

5. Close-up
Subtask 34-41-00-740-119-A

A. Do the test given in Para. 3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:33:06 UTC