Deactivation of the Smoke-Detection Control Unit (SDCU)

TASK 26-17-00-040-802-A
Deactivation of the Smoke-Detection Control Unit (SDCU)

Task Summary

Access	Test	Specific Tools	Mhr	E/T	Nb Men
NO	NO	NO	0.3	0.3	1

1. Reason for the Job
MMEL 26-17-02A
SMOKE DETECTION CONTROL UNIT (SDCU) (FAA ONLY)
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	LABEL - INOPERATIVE DO NOT ENTER
No specific	1	WARNING NOTICE(S)

B. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power

3. Job Set-up
Subtask 26-17-00-861-057-A ** ON A/C NOT FOR ALL

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

4. Procedure
Subtask 26-17-00-040-051-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that the lavatory waste receptacle is empty.
(2) Close and lock the related lavatory door.
(3) Put a placard LABEL - INOPERATIVE DO NOT ENTER on the related lavatory door.
(4) Put a WARNING NOTICE(S) in the cockpit to tell the crew that the smoke detector of the related lavatory does not operate.
(5) Make an entry in the logbook.

5. Close-up
Subtask 26-17-00-862-058-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.03.31 23:44:01 UTC