Removal of the Smoke Detector - Avionics Compartment

TASK 26-15-15-000-001-A
Removal of the Smoke Detector - Avionics Compartment

ZONE: 128
FIN: 1WA

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
128	REAR AVIONIC COMPARTMENT
824

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 52-41-00-010-002-A	Open the Avionics Compartment Doors for Access
Smoke Detector

3. Job Set-up
Subtask 26-15-15-861-052-A

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

Subtask 26-15-15-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	AIR COND/AVNCS VENT/CTL	5HQ	D05

Subtask 26-15-15-010-050-A

C. Get Access
(1) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position below access door 824.
(2) Open access door 824 (Ref. AMM TASK 52-41-00-010-002).

4. Procedure
Subtask 26-15-15-020-050-A

A. Removal of the Smoke Detector

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTOR IS CLEAN BEFORE YOU DISCONNECT/CONNECT IT. CONTAMINATION OF THE ELECTRICAL CONNECTOR CAN CAUSE INCORRECT FIRE DETECTION.

CAUTION: PUT BLANKING CAPS ON THE OPEN ELECTRICAL CONNECTORS AFTER YOU DISCONNECTED THEM. IF YOU DO NOT DO THIS, CONTAMINATION OF THE CONNECTORS CAN OCCUR.

(1) If the protective cap (10) is attached to the harness (11), remove it from the smoke detector (1) .

NOTE: It is not necessary to remove the protective cap (10) from the smoke detector (1), if it is not attached to the harness (11).

(2) Disconnect the electrical connector (2) from the smoke detector (1).
(3) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(4) Hold the smoke detector (1) and loosen the locknut (7) to fully release the clamp (6).
(5) Pull the smoke detector (1) vertically away from the ventilation duct (5).
(6) Remove the protective band (9) from the smoke detector (1).
(7) If the protective strip (8) is installed, remove it from the smoke detector (1).
(8) Remove and discard the O-rings (3) from the couplings (4).
(9) Put the PLUG - BLANKING on the couplings (4) and on the openings of the smoke detector (1).

[Rev.10 from 2021] 2026.03.31 23:43:47 UTC