170 Fire

  1. What airplane systems have fire detection and protection?
    • • Engines
    • • APU
    • • Cargo Compartments
    • • Lavatories
  2. Are the cockpit and cabin protected from fire?
    • Yes

    • Cockpit 1 hand-held Halon fire extinguisher

    • Cabin 4 hand-held Halon Fire extinguishers (2 fwd & 2 aft)
  3. How are the engines and APU protected from fire?
    • Engines 2 Halon fire bottles

    • APU 1 Halon fire bottle dedicated to the APU only
  4. Can both engine fire bottles be used for one engine if needed?
  5. What is the power source for engine and APU fire detection and protection?
    • • Engine Detection            DC ESS
    • • Engine Protection           HOT BATT
    • • APU Detection               DC ESS
    • • APU Protection              DC ESS
  6. Describe the engine and APU fire detection system
    • Engine 8 pneumatic fire detectors (2 loops) per engine

    • APU 2 pneumatic fire detectors (2 loops)
  7. Describe the fire test
    • • Press and hold the test button on the overhead panel for a minimum of 3 seconds, but no more than 10seconds if the APU is running or it will automatically shutdown the APU
    • • Aural warnings􀂃 Fire bell􀂃 Triple chime

    • Visual indications􀂃

    Overhead panel• Fire handle 1• Fire handle 2• Cargo smoke (FWD) extinguisher button• Cargo smoke (AFT) extinguisher button• APU extinguisher button• APU EMER STOP (top half of button)􀂃

    Glareshield• Master warning light (left)• Master warning light (right)􀂃

    EICAS• ENG 1 FIRE (CAS message)• ENG 2 FIRE (CAS message)• CARGO FWD SMOKE (CAS message)• CARGO AFT SMOKE (CAS message)• APU FIRE (CAS message)• FIRE (Engine 1 ITT gauge)• FIRE (Engine 2 ITT gauge)
  8. What happens when an engine fire handle is pulled?
    • • Closes respective engine fuel SOV
    • • Closes respective engine hydraulic SOV
    • • Closes respective engine bleed SOV
  9. What is an indication of an APU fire?
    • • Fire bell
    • • Red stripe in the EMER STOP button
    • • APU FIRE is displayed on the EICAS
  10. Will the APU automatically shutdown if a fire is detected?
    Only on the ground
  11. What happens if the APU EMER STOP button is pushed after a fire has been detected?
    • • APU shuts off immediately without a 1-minute cool-down
    • • APU fuel SOV closes
    • • APU FIRE EXTG button illuminates
  12. What happens if the APU EMER STOP button is not pushed after a fire has been detected?
    After one minute the APU FIRE EXTG button illuminates
  13. Will the APU fire extinguisher automatically discharge?
  14. How many smoke detectors are installed in the cargo compartments?
    • • 3 detectors in the FWD compartment
    • • 2 detectors in the AFT compartment
  15. What happens to the forward cargo compartment in the event smoke is detected?
    • • Recirculation fan shuts off
    • • Ventilation outflow valve closes
  16. What is the purpose of this (refer to above question)?
    • • Prevents oxygen from entering the compartment
    • • Prevents Halon agent from escaping into the aircraft’s cabin
  17. How many extinguishing bottles are installed for the cargo compartments?
    • • 2 bottles used for both compartments
    • • 1 high-rate bottle and 1 low-rate bottle
  18. What is the difference between the high-rate bottle and the low-rate bottle?
    • • High-rate bottle saturates the compartment immediately
    • • Low-rate bottle maintains saturation over a duration of time
  19. How long will the low-rate bottle remain active in the compartment?
    60 minutes
  20. Can one bottle be used for one compartment and the other bottle for the other compartment?
    No. Only one compartment may be selected (FWD or AFT)
  21. What happens when a cargo extinguishing button is pushed if smoke has been detected?
    • High-rate bottle discharges immediately

    • Low-rate bottle discharges after one minute if the airplane is in flight

    • If airplane is on the ground (weight-on-wheels) the low-rate bottle will NOT automatically discharge
  22. During flight, can the low-rate bottle be discharged before the minute is up?
    Yes, by pushing the extinguishing button again
  23. How can the low-rate bottle be discharged if the airplane is on the ground (weight-on-wheels)?
    The extinguishing button must be pushed again
  24. Can cargo extinguishing be used if no smoke is detected?
    • Yes. The high-rate bottle extinguishing button must be pushed twice, once to arm the bottle and once todischarge the bottle

    • The low-rate bottle automatically discharges after one minute if in flight
  25. How are the lavs protected from fire?
    Heat-sensitive extinguishers in the lav waste bins automatically discharge if a predetermined temperature is reached
Card Set
170 Fire
170 Fire