Fire Protection System Flashcards
(28 cards)
How many Engine fire loops?
2 in each engine
How many APU fire loops?
1
Fault Light
Both loops failed in normal
Selected loop failed if in A or b mode
Failure of one fire loop?
Automatically reverts to other
How many Engine Fire Extinguishers?
2, can be discharged to either engine
How many APU Fire Extinguishers
1
Fire Detection Loops Power
Battery Bus
Fire Extinguisher Power
Hot Battery Bus
Fault/Inop Test Indications
Master Caution
OVHT/DET
Fault Light
APU DET INOP
Overheat/Fire Test Indications
Fire Warning Bell
Master Warning
Master Caution
OVHT/DET
All Fire Switch Lights
ENG Overheat lights
Wheel Well fire warning light (if connected to AC power)
APU Fire warning horn and light
Fuel Control Switches
Extinguisher Test
Verify circuit continuity form the squib to the respective fire switch
APU Automatic shutoff
After 10 seconds on the ground with engines off
Main Wheel Well Fire Protection Power
No1 AC Transfer Bus
Which Wheel Wells are protected?
Mains, not nosewheel
Indications of Wheel Well Fire
Fire Warning Bell
Master Warning
Wheel Well Fire Warning Light
What to do for a Wheel Well Fire?
Lower Wheel well and change speed to 250 for 20 minutes
How many Fire Protection Control Units?
12
How any Optical Fire Detector Units can the FCPU monitor?
16
How many Thermal Fire Detection Element loops can the FCPU monitor?
4
How many Suppressor Interface Units can the FCPU monitor?
8
Dry Bay Fault Caution Message
Suppressor Fails
SIU Faulted
2 Optical Fire Detector Units Failed
Pressure Transducer Failed
Dry Bay Discharge Caution Message
2 Optical Fire Detectors sensor fire
Dry Bay Fire Warning
Discharge not successful
Optical Alarms ignored for 10 seconds after discharge
Discharge in 7 second intervals
Dry Bay Smoke Caution Message
Smoke Clearing Mode
-Close Overboard Exhaust Valves
-Shut off recirculation fans
-Packs to high
-Disable EE cooling supply fans
