Loss of the Audio Signal from the DME Interrogator 1

TASK 34-51-00-810-821-A
Loss of the Audio Signal from the DME Interrogator 1

1. Possible Causes

INTRG-DME, 1 [2SD1]
AMU [1RN]
wiring of the DME 1 AUDIO bus from the AMU (1RN) to the DME interrogator 1 (2SD1)

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 23-51-34-000-001	Removal of the Audio Management Unit (AMU) (1RN)
AMM 23-51-34-400-001	Installation of the Audio Management Unit (AMU) (1RN)
AMM 34-51-00-710-001	Operational Test of the DME
ASM 345101
AMM 34-51-33-000-001	Removal of the DME Interrogator
AMM 34-51-33-400-001	Installation of the DME Interrogator

3. Fault Confirmation
Subtask 34-51-00-710-050-A

A. Test
(1) Do the operational test of the DME AMM 34-51-00-710-001.

4. Fault Isolation
Subtask 34-51-00-810-076-A

A. If there is no audio signal on the loud speakers during the test, when the DME 1 data are shown on the ND:

(1) If the fault continues:

(a) If the fault continues:

do a check and repair the wiring of the DME 1 AUDIO bus from the AMU (1RN) to the DME interrogator 1 (2SD1) ASM 345101.

Subtask 34-51-00-710-051-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:33:20 UTC