(3)
Carefully put the air extraction hood (8) with the smoke detector
(13) in position on the ceiling panel and install the screws (7).
(4)
Carefully push the air extraction grill (9) into the air extraction hood (8).
(5)
Remove the blanking plugs from the line ends.
(6)
Connect the hose (5) to the air extraction hood (8) and tighten the clamp (6).
(7)
Remove the blanking caps from the electrical connectors.
(8)
Make sure that the electrical connectors are clean and in the correct condition.
(9)
Connect the electrical connector 4WQ-A (12) to the smoke detector (13).
Subtask 26-17-15-865-083
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 11WQ, 12WQ.
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C. Test of the Lavatory Smoke Detector
(1) Do an operational test of the lavatory smoke-detection system (Ref. TASK 26-17-00-710-001).
5. Close-up
________ Subtask 26-17-15-410-053
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Install the ceiling panel 261BC (Ref. TASK 25-23-42-400-002).
(3) Remove the stepladder. Subtask 26-17-15-862-055
B. De-energize the aircraft electrical circuits
(Ref. TASK 24-41-00-862-002)
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TASK 26-17-15-000-004 Removal of the Lavatory Smoke Detector 5WQ
1.
Reason for the Job
__________________
Self Explanatory
2.
Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific blanking caps
No specific blanking plugs
No specific circuit breaker(s) safety clip(s)
No specific stepladder 1.0 m (3 ft. 3 in.)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the
External Power 25-23-42-000-002 Removal of the Ceiling Panels - Aft Utility Area 26-17-15-991-004 Fig. 403
3. Job Set-up
__________ Subtask 26-17-15-861-057
A. Energize the aircraft electrical circuits
(Ref. TASK 24-41-00-861-002).
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Subtask 26-17-15-865-064
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 26-17-15-010-055
C. Get Access
(1)
Put a stepladder in position to the related lavatory.
(2)
Remove the ceiling panel 262BC to get access to the lavatory smoke detector (13) (Ref. TASK 25-23-42-000-002).
4. Procedure
_________ (Ref. Fig. 403/TASK 26-17-15-991-004) Subtask 26-17-15-020-054
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 5WQ-A (4) from the smoke detector (13).
(2)
Put blanking caps on the disconnected electrical connectors.
(3)
Loosen the clamp (10) and disconnect the hose (11) from the air extraction hood (8).
(4)
Put blanking plugs on the disconnected line ends.
(5)
Carefully pull the air extraction grill (7) from the air extraction hood (8).
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Smoke Detector 5WQ
Figure 403/TASK 26-17-15-991-004
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(6)
Carefully remove the screws (9) and lower the air extraction hood (8) together with the smoke detector (13).
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