Reactivation of the CDLS Back-up System

TASK 52-51-00-440-802-A
Reactivation of the CDLS Back-up System

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. 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)
TASK 52-51-00-710-004-A	Operational Test of the Back-Up System
TSM 52-51-00-810-801	(for corrective action)

3. Job Set-up
Subtask 52-51-00-860-114-A

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that access to the cockpit is available.

Subtask 52-51-00-865-137-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 52-51-00-440-056-A

A. Reactivation of the CDLS Back-up System
(1) Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

4MQ.

Subtask 52-51-00-710-062-A

B. Test Procedure
(1) Do the troubleshooting of the cockpit-door locking system TSM 52-51-00-810-801.
(2) Do the operational test of the back-up system (Ref. AMM TASK 52-51-00-710-004).

5. Close-up
Subtask 52-51-00-860-115-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