Removal of the CVR Microphone

TASK 23-71-13-000-001-A
Removal of the CVR Microphone

ZONE: 210
FIN: 16RK ** ON A/C NOT FOR ALL
FIN: 17RK ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	CAP - BLANKING
No specific	1	EXTRACTION TOOL - INSERT
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 25-13-41-000-806-A	Removal of Outlet Assembly Panels 211LC and 212LC
ESPM 2042210
ESPM 2044110
ESPM 2056420
CVR Microphone ** ON A/C NOT FOR ALL
Pre-amplified Integrated CVR-microphone ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 23-71-13-861-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 23-71-13-865-050-A ** ON A/C NOT FOR ALL

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	COM/CVR/SPLY	2RK	E14
49VU	COM/CVR/CTL	4RK	E13
** ON A/C NOT FOR ALL
49VU	COM/CVR/SPLY	23RK	E14
49VU	COM/CVR/CTL	26RK	E13

Subtask 23-71-13-010-050-A ** ON A/C NOT FOR ALL

C. Get Access to the CVR Microphone
(1) Remove the Outlet Assembly Panel. (Ref. AMM TASK 25-13-41-000-806)

4. Procedure
Subtask 23-71-13-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the CVR Microphone
(1) Loosen the QAD fasteners (10) by one quarter turn.
(2) Pull overhead control and indicator panel 25VU (11) from its housing.
(a) Do not disconnect the connectors.
(3) Loosen the screw (5) and remove the washers (6) and (7), and the wire clamp (14).
(4) Loosen the screws (12) and remove the washers (13).
(5) Remove the CVR microphone (2) with its support (3).
(6) Loosen the screws (1) and remove the washers (4).
(7) Remove the CVR microphone (2) from its support (3).
(8) Disconnect the connector (8) from the receptacle (9).
(9) Put CAP - BLANKING on the receptacle (9).
(10) Cut the tie wraps on the protective conduit of the cable of the CVR microphone (2).
(11) Remove the labels from the protective conduit.
(12) Keep the labels for the subsequent installation procedure.
(13) Remove the cable of the CVR microphone (2) from the connector (8) as given in the ESPM 2044110.
(a) Remove the wires of the cable of the CVR microphone (2) from the connector (8) with the EXTRACTION TOOL - INSERT as given in the ESPM 2056420 and ESPM 2044110.

NOTE: If there is a solder sleeve, you can remove it with the ESPM 2042210.

NOTE: To find the P/N of the connector, you can refer to the Aircraft Illustrated Parts Catalog (AIPC) of the electrical routing (24-92-01).

(b) Remove the protective conduit from the cable of the CVR microphone (2).
(c) Keep the connector (8) and the protective conduit for the subsequent installation procedure.

[Rev.10 from 2021] 2026.04.02 06:12:19 UTC