Fire Protection Flashcards
Engine Fire Extinguisher Handle PULL/ROTATE
PULL - closes bleed air, fuel and hyd SOV
ROTATE - discharges bottles
APU Fire Extinguisher Button
closes APU fuel SOV and discharges APU fire extinguisher bottle
Cargo Fire Detection/Extinguisher Button
automatically discharges the high and low rate cargo extinguisher bottles into the associated cargo compartment
Which electrical busses power the engine fire detection/extinguishing?
detection - MAU 1 (DC ESS BUS 1) and MAU 3 (DC ESS BUS 2)
extinguishing - HOT BATT BUS 1 and HOT BATT BUS 2
Describe the engine fire detection system
eight pneumatic detector loops connected to the MAU
engine fire indications
- aural warning
- fire extinguisher handle illuminates
- master WARNING
- FIRE light on respective ITT indicator
- ENG 1 or 2 FIRE on EICAS
Where are the engine fire extinguishing bottles located?
the wing and fuselage fairing
How many engine fire bottles?
2
Which electrical busses power the APU fire detection/extinguishing?
detection - MAU 1 (DC ESS BUS 1) MAU 3 (DC ESS BUS 2)
extinguishing - DC ESS BUS 2
Describe the APU fire detection system
two pneumatic detector loops connected to the MAU
APU fire indications
- aural warning
- red stripped bar on APU emerg stop
- master WARNING
- APU FIRE on EICAS
How many APU extinguisher bottles?
one
On the ground the APU will automatically shut down if:
the APU Emergency Stop Button is not pressed 10 seconds after an APU fire detection
When the APU Fire Extinguisher button is pressed the system:
- discharges the APU fire bottle
- shuts down the APU
- closes the APU fuel SOV
- displays APU FIREX BTL DISCH on EICAS
Number of cargo smoke detectors
fwd - three
aft - two
cargo fire indications
- aural warning
- master WARNING
- cargo compartment extinguishing button illuminates
- CRG AFT or FWD SMOKE on EICAS
How many cargo extinguisher bottles and location?
2; center electronics bay
Pressing the cargo compartment extinguishing button causes:
- high rate bottle discharges immediately
- CRG FIREX HI DISCH on EICAS
- one min later or upon second press in air (or upon second press on ground) low rate bottle discharges and remains in compartment for 1 hour
Non annunciated cargo fire extinguishing
first button press arms bottles
Number of lav smoke detectors
2, one in each lav ceiling
Lav smoke detection indications
- master WARNING
- LAV SMOKE on EICAS
- alarm in lav
- flashing amber light on attendant light panel
How many lav fire bottles and location?
2, one installed on each lav waste container
Lav fire bottle operation
high temp automatically discharges extinguishing agent
Fire Detection Test indications
- aural warnings
- master WARNING
- ENG 1 or 2 FIRE on EICAS
- APU FIRE on EICAS
- CRG AFT (FWD) SMOKE on EICAS
- fire handles illuminate
- APU fire extinguishing button and APU emergency stop button illuminates
- cargo fire extinguishing buttons illuminate
- forward cargo fan deactivates and vent outflow valve closes (only if bleed air is being provided)
- FIRE warning on ITT indicator
