Recording on One or All Channels Inoperative (Operative on the CVR MIC Channel Only)

TASK 23-71-00-810-803-A
Recording on One or All Channels Inoperative (Operative on the CVR MIC Channel Only)

1. Possible Causes

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 23-71-00-710-001	Operational Test of the CVR and the CVR Channel Recording
ASM 237102
AMM 23-71-35-000-001	Removal of the Cockpit Voice Recorder (CVR) 1RK
AMM 23-71-35-400-001	Installation of the Cockpit Voice Recorder (CVR) 1RK

3. Fault Confirmation
Subtask 23-71-00-710-054-A

A. Test
(1) Do the operational test of the CVR and the CVR channel recording AMM 23-71-00-710-001.

4. Fault Isolation
Subtask 23-71-00-810-052-A

A. If during the operational test the recording is inoperative:

(1) If the fault continues:

(2) If the fault continues:

do a check and repair the wiring from the CVR (1RK) to the AMU (1RN) ASM 237102.

Subtask 23-71-00-710-055-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:25:47 UTC