Installation of the Smoke Detector - Avionics Compartment

TASK 26-15-15-400-001-A
Installation 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	CLEANING EQUIPMENT - COMPRESSOR
No specific	Torque wrench: range to between 0.033 and 0.027 m.daN (2.92 and 2.39 lbf.in )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
128	REAR AVIONIC COMPARTMENT
824

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
3	O-RINGS	AIPC 26-15-01-01-020
3	O-RINGS	AIPC 26-15-81-01-080

D. 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
TASK 26-15-00-710-001-A	Operational Test of the Avionics Smoke Detection
TASK 52-41-00-010-002-A	Open the Avionics Compartment Doors for Access
TASK 52-41-00-410-002-A	Close the Avionics Compartment Doors after Access
Smoke Detector

3. Job Set-up
Subtask 26-15-15-010-051-A

A. Get Access
(1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.
(3) Make sure that access door 824 is open (Ref. AMM TASK 52-41-00-010-002).

Subtask 26-15-15-865-051-A

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

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

4. Procedure
Subtask 26-15-15-420-050-A

A. Installation 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.

(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Clean the component interfaces and the adjacent area.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Remove the PLUG - BLANKING from the couplings (4) and the smoke detector (1).
(5) Make sure that the couplings (4) have no blockage. If necessary clean the couplings (4) with the CLEANING EQUIPMENT - COMPRESSOR.
(6) Install the new AIPC 26-15-01-01-020 O-RINGS (3)AIPC 26-15-81-01-080 O-RINGS (3) on the couplings (4).
(7) If applicable, install the protective strip (8) on the smoke detector (1).
(8) Install the protective band (9) on the smoke detector (1).
(9) Put the smoke detector (1) in position on the couplings (4).
(10) Make sure that the locator of the smoke detector (1) is correctly installed behind the label on the ventilation duct (5).
(11) Close the clamp (6) on the protective band (9). Tighten the locknut (7).
(12) TORQUE the locknut (7) to between 0.033 and 0.027 m.daN (2.92 and 2.39 lbf.in )

.
(13) Remove the CAP-BLANKING from each electrical connector and receptacle.
(14) Make sure that all the electrical connections are clean and in the correct condition.
(15) Connect the electrical connector (2) to the applicable electrical receptacle of the smoke detector (1).
(16) If the protective cap (10) is attached to the harness (11), install it on the applicable electrical receptacle of the smoke detector (1).
(17) Make sure that the protective cap (10) is in the correct position on the smoke detector (1).

Subtask 26-15-15-865-052-A

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

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

Subtask 26-15-15-710-050-A

C. Operational Test
(1) Do the operational test of the avionics smoke detection system from the MCDU. (Ref. AMM TASK 26-15-00-710-001)

5. Close-up
Subtask 26-15-15-410-050-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close access door 824 (Ref. AMM TASK 52-41-00-410-002).
(3) Remove the access platform(s).

Subtask 26-15-15-862-052-A

B. 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 23:43:48 UTC