Reactivation of the Door Locking System Selector on the Back Up Panel

TASK 52-51-00-440-008-A
Reactivation of the Door Locking System Selector on the Back Up Panel

1. Reason for the Job
MMEL 52-01-03-34A
OFF FUNCTION OF THE LKG SYS ON THE CKPT DOOR BK UP OVERHEAD PANEL
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 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 52-51-00-710-001-A	Operational Test of the Routine Access
TSM 52-51-00-810-801	(for corrective action)

3. Job Set-up
Subtask 52-51-00-860-090-A

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

Subtask 52-51-00-865-076-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
122VU	DOORS/PAX/MONG	1MQ	T13
122VU	CKPT/OVRD SYS/SPLY	4MQ	S10

4. Procedure
Subtask 52-51-00-810-053-A

A. Test Procedure
(1) Do the trouble shooting of the cockpit door lock system TSM 52-51-00-810-801.
(2) Do the operational test of the cockpit door locking system (Ref. AMM TASK 52-51-00-710-001).

5. Close-up
Subtask 52-51-00-860-091-A

A. Put the aircraft back to the serviceable condition.
(1) Remove the deactivation entry from the aircraft technical log.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.04.02 06:28:22 UTC