Fire Protection Flashcards
What areas have detection and extinguishing capabilities?
Engines. APU. Cargo Compartments. Lavatories.
What happens when a Fire Handle is pulled?
Four valves close: Fuel SOV. Hydraulic SOV. Bleed SOV. XBLEED SOV.
Can both engine fire bottles be used for one engine if needed?
Yes, by rotating a single fire handle both directions (bottle A is left, bottle B right).
How many extinguishing bottles are installed in the cargo compartments?
2 bottles used for both compartments. 1 high-rate bottle and one 1 low-rate bottle.
Can one cargo bottle be used for one compartment in the other bottle for the other compartment?
No. Only one compartment may be selected (FWD or AFT).
What happens, In Flight, when a cargo extinguishing button is illuminated and is pressed? What happens if the button does not illuminate?
The High Rate Bottle will discharge immediately, and after 1 minute the Low Rate Bottle will discharge. It requires a press to arm, then an additional press to discharge.
What happens, On The Ground, when a cargo extinguishing button is illuminated and is pressed?
Only the High Rate Bottle will discharge. However if you press the button again after that, it will also discharge the low rate bottle.
How long will the low-rate bottle remain active in the compartment?
Continues for 75 minutes…allowing for a 60 minute diversion time
What happens when an APU Fire is detected? What happens when the APU Fire Extinguisher Button is pressed?
The top half of APU EMER STOP button illuminates, 10 seconds later the APU will auto shutdown (if on the ground). It does this by closing the fuel shutoff valve. If this doesn’t put out the fire the QRH will direct you to push the APU Fire Extinguisher Button, which discharges the halon bottle.
Fuel SOV commanded closed (again). Halon Fire Extinguisher Discharges.
Will the APU Fuel SOV automatically close if a fire is detected? Will the APU Halon Bottle ever discharge automatically?
On the ground, yes. (after 10 seconds). It will also close if the TEST button is held for 10 seconds!
No.
How are the lavs protected from fire?
Smoke Detectors on ceiling of each lav and heat-sensitive extinguishers in the lav waste bins automatically discharge if a predetermined temperature is reached.
What happens if the APU EMER STOP button is not pushed after a fire has been detected?
After 1 minute the APU FIRE EXTG button illuminates.
How is engine fire detected?
Monitored by two detector loops.
How many smoke detectors are in the cargo compartment?
FWD: 3 smoke detectors. AFT: 2 smoke detectors.
What happens when smoke is detected in the lav?
Master warning light illuminates. “EICAS LAV SMOKE” is displayed. Alarm and smoke detector light goes off in lav. Flashing orange light on FA panel.
