Deactivation of the CVR

TASK 23-71-00-040-801-A
Deactivation of the CVR

FIN: 1RK ** ON A/C NOT FOR ALL

1. Reason for the Job
This procedure gives the instructions necessary to do the deactivation of the CVR.
This procedure prevents the deletion of the CVR data:

When the aircraft is on jacks.
If there is an incident.

This procedure must agree with the local authorities.

NOTE: This deactivation task is not related to an MMEL/MCDL item.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. 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 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)

3. Job Set-up
Subtask 23-71-00-860-067-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 23-71-00-865-059-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) closed:

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

4. Procedure
Subtask 23-71-00-040-050-A ** ON A/C NOT FOR ALL

A. Deactivation of the CVR
(1) Open, safety and tag this(these) circuit breaker(s):

For 115VAC: 2RK(E14).

Subtask 23-71-00-040-050-B ** ON A/C NOT FOR ALL

A. Deactivation of the CVR
(1) Open, safety and tag this(these) circuit breaker(s):

For 28VDC: 23RK(E14).

5. Close-up
Subtask 23-71-00-860-068-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Make an entry in the logbook.
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(3) Make sure that the work area is clean and clear of tools and other items.

[Rev.10 from 2021] 2026.04.02 06:12:18 UTC