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P8-75 CARGO FIRE CONTROL PANEL
Forward Cargo Compartment Smoke Detection Schematic
Figure 2
A 737-300/400/500MAINTENANCE MANUAL
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G96760
A
737-300/400/500MAINTENANCE MANUAL
~................................................................. | TABLE 1 | ................................................................... | LOOP A | LOOP B | INDICATION | ................................................................... |Normal |Normal |Normal | ................................................................... |Normal |Fault |Fault | ................................................................... |Normal |Fire |Normal | ................................................................... |Normal |Inop |Normal | ................................................................... |Fault |Normal |Fault | ................................................................... |Fault |Fault |Fault | ................................................................... |Fault |Fire |Fire | ................................................................... |Fault |Inop |Fault | ................................................................... |Fire |Normal |Normal | ................................................................... |Fire |Fault |Fire | ................................................................... |Fire |Fire |Fire | ................................................................... |Fire |Inop |Fire | ................................................................... |Inop |Normal |Normal | ................................................................... |Inop |Fault |Fault | ................................................................... |Inop |Fire |Fire | ................................................................... |Inop |Inop |Normal | 2.....................….....................….....................1
B. Tests
(1) Circuit Test
(a) This test will make sure that the smoke detection circuit and all the components operate correctly. When you push the TEST switch on the Cargo Fire Control panel, it will initiate a test of the CEU. The CEU will initiate a test of all the smoke detectors and will initiate the fire warning indications.
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737-300/400/500MAINTENANCE MANUAL
(2) Smoke Test
(a) This test will make sure that the smoke detectors and the smoke detection circuit operate correctly. Supply a set amount of smoke near one of the smoke detectors and make sure all the fire warning indications come on.
C. Manual Operation
(1)
Supply Electrical Power (AMM 24-22-00/201).
(2)
Close these circuit breakers, on the Circuit Breaker Panel P6 or P18:
(a)
FWD CARGO SMOKE DETECTION A
(b)
FWD CARGO SMOKE DETECTION B
(c)
AFT CARGO SMOKE DETECTION A
(d)
AFT CARGO SMOKE DETECTION B
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737-300/400/500MAINTENANCE MANUAL
CARGO COMPARTMENT SMOKE DETECTION - ADJUSTMENT/TEST
___________________________________________________
1. General_______
A. The two lower cargo compartments have smoke detectors installed in the ceiling. When the concentration of smoke at the sensor gets to a set threshold, the smoke detector alarm occurs.
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