No Audio Warning During Weather Radar 2 BITE Test
TASK 34-41-00-810-845-A
No Audio Warning During Weather Radar 2 BITE Test
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 34-41-00-740-128-A 4. Fault Isolation
Subtask 34-41-00-810-108-A
Subtask 34-41-00-740-129-A
[Rev.8 from Aug 2018]
2026.04.04 04:33:06 UTC
No Audio Warning During Weather Radar 2 BITE Test
1. Possible Causes
[1SQ2] - MIXING BOX-AUDIO [15WW]
- wiring between the WXR 2 and the Audio Mixing Box
- wiring between the WXR 2 and the weather radar control unit
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 31-53-33-000-001 | Removal of the Audio Mixing Box |
| AMM 31-53-33-400-001 | Installation of the Audio Mixing Box |
| AMM 34-41-00-740-002 | BITE Test of the Weather Radar |
| AMM 34-41-33-000-004 | Removal of the Weather Radar Transceiver |
| AMM 34-41-33-400-003 | Installation of the Weather Radar Transceiver |
Subtask 34-41-00-740-128-A 4. Fault Isolation
Subtask 34-41-00-810-108-A
A. If the test gives the maintenance message WXR2(1SQ2)/WRG:AUDIO OUTPUT:
5. Close-up- replace the
[1SQ2] AMM 34-41-33-000-004 and AMM 34-41-33-400-003.
- replace the MIXING BOX-AUDIO [15WW] AMM 31-53-33-000-001 and AMM 31-53-33-400-001.
- do a check and repair the wiring between the WXR 2 and the Audio Mixing Box : pins AB/9K, 8K and pins AA/A, B.
- do a check and repair the wiring between the WXR 2 and the weather radar control unit : pin 1F and pins AA/G, BB/G.
Subtask 34-41-00-740-129-A
A. Do the BITE test in para. 3