26-17-00-991-008 Fig. 503
3. Job Set-up
__________
Subtask 26-17-00-861-050
A. Energize the aircraft electrical circuits
(Ref. TASK 24-41-00-861-002).
Subtask 26-17-00-865-050
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 122VU AIR COND/LAV/GALLEY VENT CTL/EXTRACT FAN/CTL 5HU U21
**ON A/C 001-003, 051-052,
Subtask 26-17-00-010-050
C. For access only to the relevant lavatory smoke-detector (removal not necessary):
-
LAV. A (Ref. TASK 26-17-15-000-001)
-
LAV. D (Ref. TASK 26-17-15-000-002)
-
LAV. E (Ref. TASK 26-17-15-000-004)
**ON A/C 004-049, 053-099, 101-105, 151-199, 201-299,
Subtask 26-17-00-010-057
D. For access only to the related lavatory smoke-detector (removal not
necessary):
-
LAV. A (Ref. TASK 26-17-15-000-001)
-
LAV. B, D, E, F, H, K, L and M (Ref. TASK 26-17-15-000-008)
**ON A/C 001-049, 051-099, 101-105, 151-199, 201-299,
Subtask 26-17-00-480-050
E. Connect a test plug assembly and a multimeter between the smoke detector and the electrical connector. (Ref. Fig. 501/TASK 26-17-00-991-001, 502/TASK 26-17-00-991-007, 503/TASK 26-17-00-991-008)
NOTE : The minimum input resistance of the multimeter must be 10 MEG
____
OHMS.
Subtask 26-17-00-865-051
F. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 11WQ, 12WQ.
4. Procedure
_________
Subtask 26-17-00-720-051
A. Test of the Lavatory Smoke-Detector Sensitivity (ionization type
smoke-detector)
NOTE : The voltage is between 6 and 6.5 V DC when the SDCU does an
____ automatic test of the smoke detectors. The sensitivity check must be done after approximately 10 seconds, with the detector in stand-by condition.
(1) Do this test.
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the test plug assembly: On the multimeter:
-read the voltage shown on the multimeter. - the voltage is between 4 and 5 V DC.
Smoke-Detector Test Plug Assembly
Figure 501/TASK 26-17-00-991-001
Test Plug Assembly for Photo-Electric Type Smoke Detector
Figure 502/TASK 26-17-00-991-007
Lavatory Smoke Detector - Visual Identification
Figure 503/TASK 26-17-00-991-008
Subtask 26-17-00-720-052
B. Test of the Lavatory Smoke-Detector Sensitivity (photo-electric type smoke-detector)
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
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