No Audio Warning During Weather Radar 1 BITE Test

TASK 34-41-00-810-844-A
No Audio Warning During Weather Radar 1 BITE Test

1. Possible Causes

2. Job Set-up Information
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

3. Fault Confirmation
Subtask 34-41-00-740-126-A

A. Do the BITE test of the Weather Radar 1 AMM 34-41-00-740-002.

4. Fault Isolation
Subtask 34-41-00-810-107-A

A. If the test gives the maintenance message WXR1(1SQ1)/WRG:AUDIO OUTPUT:

(1) If the fault continues:

(2) If the fault continues:

do a check and repair the wiring between the WXR 1 and the Audio Mixing Box : pins AB/9K, 8K and pins AA/C, D.

(3) If the fault continues:

do a check and repair the wiring between the WXR 1 and the weather radar control unit : pin 1F and pins AA/G, BB/G.

5. Close-up
Subtask 34-41-00-740-127-A

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

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