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11 Cards in this Set
- Front
- Back
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Fire detection & extinguishing |
Engines (overheat & fire) APU Cargo compartments Main wheel wells Lavatories (heat activated)
Detection pwrd from battery bus - main wheel well (dual w/ No2 AC trans bus) - cargo compartment smoke detection pwr from DC bus 1&2 Extinguishing pwrd from hot batt bus |
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Engine Overheat / fire detection |
2 combination overheat and fire detector loops contained in ea engine- if temp reaches limit in both detector loops triggers overheat warning, higher limit triggers fire warning - fire switch / overheat light ext when temp blw limit
Test switch - FAULT INOP - tests fault detection circuits for engines / APU
Test switch - OVHT/FIRE - tests ovht and fire detection loops for engine/APU/wheel well |
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OVHT DET switch (center) |
Test switch... OVHT/FIRE NORMAL: - FAULT illum = both detector loops failed A or B: - FAULT illum = selected detector loop fail - + corresponding ENG OVERHEAT, engine start lever and engine fire switch remain ext |
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EXT TEST switch |
3 green lights = circuit continuity is normal |
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APU fire detection |
Temp in detector loop inc to limit
Warnings + APU auto shutdown Switch light ext when temp dec blw limit
APU ground control panel in R main wheel well |
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APU DET INOP |
APU detector loop failed |
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Wheel well fire detection |
Dual fire detector loop - temp in loop inc to limit
Tested w/ OVHT/FIRE test
No extinguishing, need to lower gear - Extend speed = 270kts/.82M |
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Cargo compartment detection |
Smoke detectors (dual loop) - if one fails auto reconfigures to single loop detection
DET SELECT switch: NORM = both loops active |
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DETECTOR FAULT |
If illum when test switch pressed = 1 or more selected loops has failed Test switch = test circuits for both fire detector loops and suppression |
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Cargo fire extinguisher |
- FWD / AFT ARMED (red) switch pushed to arm extinguisher - CARGO FIRE DISCH switch - discharges 1st bottle - 2nd bottle (reduced flow) discharges after 15mins - DISCH illum when either bottle discharged |
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Lav fire detection |
- smoke detector and fire extinguisher (auto activated)
Smoke detect - Aural warning - red status indication on lav smoke detector panel - amber lav call light flashes
Aluminum cover indicates ext has discharged |
