Removal of the Buzzer from the Cockpit Door Locking System (CDLS)

TASK 52-51-13-000-001-A
Removal of the Buzzer from the Cockpit Door Locking System (CDLS)

FIN: 23MQ

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
No specific	1	TIE WRAP(S)

B. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 25-13-41-000-001-A	Removal of the Ceiling Panels
ESPM 205455
Buzzer of the CDLS

3. Job Set-up
Subtask 52-51-13-860-051-A

A. Aircraft Maintenance Configuration
(1) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).

Subtask 52-51-13-865-050-A

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	LIGHTING/EMER LT/CKPT/DOME	1LE	H08
** ON A/C NOT FOR ALL
49VU	LIGHTING/EMER LT/CKPT/DOME	1LE	H06
** ON A/C NOT FOR ALL
122VU	DOORS/PAX/MONG	1MQ	T13
** ON A/C ALL
122VU	LIGHTING/CKPT/DOME	3LE	Y06
** ON A/C NOT FOR ALL
122VU	DOORS CKPT LOCK	1MQ	T13
122VU	COCKPIT DOOR LOCK SYSTEM	1MQ	T13

4. Procedure
Subtask 52-51-13-010-051-A

A. Removal of the Ceiling Panel
(1) Remove ceiling panel 211HC (5) (Ref. AMM TASK 25-13-41-000-001).

Subtask 52-51-13-020-050-A

B. Removal of the Buzzer
(1) Disconnect the cable terminals (1) and (2).
(2) Loosen the knurled nut (4) with your hand.
(3) Remove the buzzer (3).
(4) Safety the disconnected electrical wires ESPM 205455.
(5) Temporarily attach the disconnected electrical wires to the structure with the TIE WRAP(S).

[Rev.10 from 2021] 2026.04.02 07:23:55 UTC