Permanent noise from the cockpit loudspeaker(s)

TASK 34-53-00-810-835-A
Permanent noise from the cockpit loudspeaker(s)

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 34-53-00-740-003	BITE Test of the ADF
ASM 345301
AMM 34-53-31-000-002	Removal of the ADF Receiver
AMM 34-53-31-400-002	Installation of the ADF Receiver

3. Fault Confirmation
Subtask 34-53-00-700-052-A

A. Test
Not applicable, the fault is evident.

4. Fault Isolation
Subtask 34-53-00-810-096-A

A. If there is the noise:

(1) If the fault continues:

do a check and repair the wiring of the ADF 1 AUDIO bus from the AMU (1RN) to the ADF receiver 1 (2RP1) ASM 345301

Subtask 34-53-00-740-099-A

B. Do the BITE test of the ADF AMM 34-53-00-740-003.

[Rev.8 from Aug 2018] 2026.04.04 04:38:58 UTC