Installation of the Cockpit Voice Recorder (CVR) Microphone

TASK 23-71-13-400-001-A
Installation of the Cockpit Voice Recorder (CVR) Microphone

CAUTION: DURING THE INSTALLATION OF THE CVR MICROPHONE, MAKE SURE THAT THE PASSAGE HOLE IN THE LEFT FRONT LINING PANEL IS CONCENTRIC WITH THE MICROPHONE HEAD. THIS WILL MAKE SURE THAT THE MICROPHONE HEAD NEVER TOUCHES THE PANEL EDGES.

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	1	EXTRACTION TOOL - INSERT

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 23-71-00-710-001-A	Operational Check of CVR and CVR-Channel Recording
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 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 25-13-41-000-806-A	Removal of Outlet Assembly Panels 211LC and 212LC
TASK 25-13-41-400-805-A	Installation of Outlet Assembly Panels 211LC and 212LC
ESPM 2032230
ESPM 2032510
ESPM 2033300
ESPM 204221
ESPM 2044110
ESPM 2056200
AWM 237103
AIPC 24-92-01-
CVR Microphone ** ON A/C NOT FOR ALL
Pre-amplified Integrated CVR-microphone ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 23-71-13-860-052-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).

Subtask 23-71-13-865-051-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

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 23-71-13-010-051-A ** ON A/C NOT FOR ALL

C. Get Access to the CVR Microphone
(1) Make sure that the Outlet Assembly Panel is removed to get access to the CVR Microphone. (Ref. AMM TASK 25-13-41-000-806)

4. Procedure
Subtask 23-71-13-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the CVR Microphone
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Install the cable of the CVR microphone (2) in the protective conduit and put the labels on the protective conduit as given in the ESPM 2032230 and ESPM 2032510 and ESPM 2033300.
(5) Install the cable of the CVR microphone (2) on the connector (8).
(a) Connect the wires of the CVR microphone (2) to the connector (2380VCA) with the EXTRACTION TOOL - INSERT as given in the AWM 237103, ESPM 2056200 and ESPM 2044110.

NOTE: If there is a solder sleeve, you can install it with the ESPM 204221.

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).

(6) Remove the blanking cap from the receptacle (9).
(7) Make sure that the receptacle (9) is in the correct condition.
(8) Connect the connector (8) to the receptacle (9).
(9) Put the CVR microphone (2) on its support (3).
(10) Install the washers (4) and the screws (1), and tighten the screws.
(11) Put the support (3) with the CVR microphone (2) in position.
(12) Install the washers (13) and the screws (12), and tighten the screws (12).
(13) Make sure that the wire clamp (14) is in the correct condition. Replace the wire clamp (14) if necessary.
(14) Put the wire clamp (14) on the wire of the CVR microphone (2).
(15) Put the wire clamp (14) in position and install the washers (6) and (7), and the screw (5).
(16) Tighten the screw (5).
(17) Put overhead control and indicator panel 25VU (11) in its housing.
(18) Tighten the QAD fasteners (10) by one quarter turn.

Subtask 23-71-13-420-050-B ** ON A/C NOT FOR ALL

A. Installation of the CVR Microphone

NOTE: On the base of the unit there is an attenuation switch. The default position of the attenuation switch is at 0 dB. It is not permitted to modify the user switch without Airbus approval.

NOTE: On the base of the unit there is a PEAK indicator. This indicator comes on when the microphone input level is more than 120 dB sound pressure level. It is not permitted to modify the user switch without Airbus approval.

(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Install the cable of the CVR microphone (2) in the protective conduit and put the labels on the protective conduit as given in the ESPM 2032230 and ESPM 2032510 and ESPM 2033300.
(5) Install the cable of the CVR microphone (2) on the connector (8).
(a) Connect the wires of the CVR microphone (2) to the connector (2380VCA) with the EXTRACTION TOOL - INSERT as given in the AWM 237103, ESPM 2056200 and ESPM 2044110.

NOTE: If there is a solder sleeve, you can install it with the ESPM 204221.

NOTE: To find the P/N of the connector, you can refer to the aircraft illustrated parts catalog of the electrical routing AIPC 24-92-01-.

Subtask 23-71-13-865-052-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close 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 23-71-13-710-051-A ** ON A/C NOT FOR ALL

C. Do the operational test of the cockpit voice recorder system (Ref. AMM TASK 23-71-00-710-001).

5. Close-up
Subtask 23-71-13-860-050-A ** ON A/C NOT FOR ALL

A. Make sure that the work area is clean and clear of tools and other items.

Subtask 23-71-13-010-052-A ** ON A/C NOT FOR ALL

B. Close access
(1) Install the Outlet Assembly Panel. (Ref. AMM TASK 25-13-41-400-805)

Subtask 23-71-13-862-050-A ** ON A/C NOT FOR ALL

C. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

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