Deactivation of the CDLS Back-up System

TASK 52-51-00-040-802-A
Deactivation of the CDLS Back-up System

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	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 52-51-00-861-050-A

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

Subtask 52-51-00-865-136-A ** ON A/C NOT FOR ALL

B. Table of the circuit breakers used in this procedure:

PANEL	DESIGNATION	FIN	LOCATION
122VU	CKPT/OVRD SYS/SPLY	4MQ	S10

4. Procedure
Subtask 52-51-00-040-060-A

A. Deactivation of the CDLS Back-up System
(1) Open, safety and tag this(these) circuit breaker(s):

4MQ.

(2) On overhead panel 20VU, on CKPT DOOR BKUP panel 45VU, make sure that the switch LKG SYS (21MQ) is in the NORM position.

NOTE: All parts of the CDLS (normal and back-up system, if installed) can be inopertive if the complete system is deactivated in the unlocked position and adjustment is not required by regulations for the intended flight.

5. Close-up
Subtask 52-51-00-860-113-A

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

[Rev.10 from 2021] 2026.04.02 06:28:21 UTC