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Subtask 26-17-15-865-057
B. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU AIR COND/SDCU/CHAN1 11WQ C06 122VU AIR COND/SDCU/CHAN2 12WQ T18
Subtask 26-17-15-010-053
C. Get Access
(1)
Put a stepladder in position to the related lavatory.
(2)
Remove the ceiling panel 261BC to get access to the lavatory smoke detector (13) (Ref. TASK 25-23-42-000-002).
4. Procedure
_________ (Ref. Fig. 402/TASK 26-17-15-991-002) Subtask 26-17-15-020-052
A. Removal of the Lavatory Smoke Detector
WARNING : DO NOT TRY TO OPEN OR REPAIR THE SMOKE DETECTORS.
_______ THE DETECTOR CONTAINS RADIOACTIVE AMERICIUM 241 OF APPROXIMATELY 0.4 MICROCURIES. ONLY WORKSHOPS AUTHORIZED BY THE MANUFACTURER CAN DO WORK ON THE SMOKE DETECTORS.
(1)
Disconnect the electrical connector 4WQ-A (12) from the smoke detector (13).
(2)
Put blanking caps on the disconnected electrical connectors.
(3)
Loosen the clamp (6) and disconnect the hose (5) from the air extraction hood
(4)
Put blanking plugs on the disconnected line ends.
(5)
Carefully pull the air extraction grill (9) from the air extraction hood (8).
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Smoke Detector 4WQ
Figure 402/TASK 26-17-15-991-002
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(6)
Carefully remove the screws (7) and lower the air extraction hood (8) together (8) with the smoke detector (13).
(7)
Remove the screws (1), the washers (2,11), the lanyards (3) and the nuts (10).
(8)
Carefully remove the smoke detector (13) with the packing (4) from the air extraction hood (8).
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Installation of the Lavatory Smoke Detector 4WQ
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied
from the External Power 25-23-42-400-002 Installation of the Ceiling Panels - Aft Utility Area 26-17-00-710-001 Operational Test of the Lavatory Smoke-Detection
System 26-17-15-991-002 Fig. 402
3. Job Set-up
__________
Subtask 26-17-15-860-051
A. Aircraft Maintenance Configuration
(1)
Make sure that the aircraft electrical circuits are energized (Ref. TASK 24-41-00-861-002).
(2)
Make sure that the aircraft is in the same configuration as for the removal task.
Subtask 26-17-15-865-058
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU AIR COND/SDCU/CHAN1 11WQ C06 122VU AIR COND/SDCU/CHAN2 12WQ T18
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4. Procedure
_________ (Ref. Fig. 402/TASK 26-17-15-991-002) Subtask 26-17-15-420-052
A. Installation of the Lavatory Smoke Detector CAUTION : MAKE SURE THAT THE AIR EXTRACTION GRILL, THE SMOKE DETECTOR AND
_______ THE AIR EXTRACTION DUCT ARE IN LINE WITH THE EXTRACTOR AIRFLOW. INCORRECT INSTALLATION CAN CAUSE MALFUNCTION OF THE SMOKE DETECTOR.
(1)
Carefully install the packing (4) with the smoke detector (13) to the air extraction hood (8).
(2)
Install the screws (1), the washers (2,11), the lanyards (3) and the nuts (10).
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