Removal of the Lavatory Smoke Detector

TASK 26-17-15-000-001-A
Removal of the Lavatory Smoke Detector

ZONE: 220
FIN: 1WQ ** ON A/C NOT FOR ALL

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	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
220	FWD CAB UTILITY AREAS

C. 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)
Smoke Detector

3. Job Set-up
Subtask 26-17-15-861-054-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 26-17-15-865-050-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR COND/SDCU/CHAN1	11WQ	C06
** ON A/C NOT FOR ALL
49VU	COM/CIDS/DEU B/ESS	153RH	G03
** ON A/C NOT FOR ALL
121VU	COM NAV/CIDS/DEU B/NORM	162RH	M08
** ON A/C NOT FOR ALL
121VU	COM NAV/CIDS/DEU B/NORM	162RH	M09
** ON A/C NOT FOR ALL
121VU	COM / CIDS / DEU B / NORM FWD	193RH	M09
** ON A/C NOT FOR ALL
121VU	COM/CIDS/DEU B/BAT	143RH	N12
** ON A/C NOT FOR ALL
122VU	AIR COND/SDCU/CHAN2	12WQ	T18
** ON A/C NOT FOR ALL
2001VU	CIDS-DEU B-NORM-AFT	194RH	C08

Subtask 26-17-15-010-050-F ** ON A/C NOT FOR ALL

C. Get Access

Smoke Detector ** ON A/C NOT FOR ALL

(1) Get access to the lavatory A.
(2) Get access to the smoke detector 1WQ:
(a) Remove the screws (11) and the air-extraction grille (10).
(b) Remove the air filter (12) and the grille (13) from the air-extraction hood (8).

4. Procedure
Subtask 26-17-15-020-050-E ** ON A/C NOT FOR ALL

A. Removal of the Lavatory Smoke Detector

Smoke Detector ** ON A/C NOT FOR ALL

(1) Remove the screws (7) and carefully lower the air-extraction hood (8) together with the smoke detector (5).
(2) Disconnect the electrical connector 1WQ-A (4) from the smoke detector (5).
(3) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(4) Remove the nuts (2), the washers (3) (if applicable) and the screws (9).
(5) Carefully remove the smoke detector (5) from the air-extraction hood (8).
(6) Remove the packing (6).

Subtask 26-17-15-020-050-H ** ON A/C NOT FOR ALL

A. Removal of the Smoke Detector

Smoke Detector ** ON A/C NOT FOR ALL

WARNING: DO NOT OPEN OR REPAIR THE SMOKE DETECTOR. IF THE SMOKE DETECTOR IS DAMAGED, PUT ON RUBBER GLOVES BEFORE YOU TOUCH IT. THE SMOKE DETECTOR CONTAINS RADIOACTIVE MATERIAL WHICH IS DANGEROUS. THUS ONLY WORKSHOPS APPROVED BY THE MANUFACTURER OF THE SMOKE DETECTOR ARE PERMITTED TO DO WORK ON IT. WHEN YOU DISCARD IT, OBEY THE INSTRUCTIONS OF THE SMOKE DETECTOR MANUFACTURER. ALSO OBEY LOCAL REGULATIONS FOR RADIOACTIVE MATERIALS.

(1) Remove the screws (7) and lower the air-extraction hood (8) together with the smoke detector (5).
(2) Disconnect the electrical connector 1WQ-A (4) from the smoke detector (5).
(3) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(4) Remove the nuts (2), the washers (3) (if applicable) and the screws (9).
(5) Carefully remove the smoke detector (5) with the packing (6) from the air-extraction hood (8).

[Rev.10 from 2021] 2026.04.01 06:17:25 UTC