Fire Protection Flashcards
How many fire detection loops are fitted to the
engine?
The Engine Fire Detection System is monitored by two detector loops. (81214-07-10 Pg 1)
Pulling the fire handle does what?
Anytime the fire handle is pulled it commands the following shutoff valves to close:
- The engine fuel shutoff valve;
- The engine hydraulic shutoff valves and;
- The engine bleed air shutoff valve .
- Cross Bleed valve shutoff valve
(812 14-07-10 Pg 2)
What happens when the cargo fire extinguisher button is pressed in the air after it illuminates?
After the annunciation of smoke detection in the cargo compartment, pressing the associated cargo compartment button causes:
- the high-rate fire-extinguishing bottle to discharge immediately into the selected cargo compartment.
- the EICAS ADVISORY message CRG FIREX HI DISCH to display .
One minute later, the second fire-extinguishing bottle discharges automatically at a reduced flow rate and the agent remains in the selected cargo compartment for 75 minutes for airplanes with 60- minute diversion time allowed. (B12 14-07-20 Pg 3)
During the cabin attendants LAV smoke test, what indication will be seen on the flight deck?
If smoke is detected in either lavatory ( or LAV Smoke test initiated):
- the master WARNING lights illuminate .
- the EICAS WARNING message LAV SMOKE is displayed .
- in the lavatory where the smoke has been detected an alarm sounds and the smoke detector light comes on.
- a flashing orange light on the respective attendant lights panel (rainbow lights) illuminates.
(B12 14-07-25 Pg 1 - see also B12 14-01-22 Pg 15 for attendant panel.)
Note - Lav Waste container temperature limit is 78’C for extinguishing agent to be discharged.
What indication would you see when an APU fire is detected?
Aural Warning
The red stripped bar of the APU emergency stop button illuminates;
The master WARNING lights illuminate;
EICAS WARNING message APU FIRE is displayed
(B12 14-07-15 Pg 1)
When smoke is detected in the FWD cargo
compartment, what actions are commanded immediately?
After fire or smoke is detected in the forward cargo compartment the following actions are automatically commanded by the system:
- Air circulation fan is turned off; (if FWD cargo compartment recirculation system installed)
- The high-rate fire extinguishing bottle is armed and;
- The forward cargo compartment ventilation outflow valve is commanded closed.
(B12 14-07-20 Pg 2)
On the ground, if the APU is on fire and is not shut down, what happens?
On ground, the APU will automatically shut down 10 seconds after the fire condition is present. (B12 14-07-15 Pg 2)
The fire protection system provides fire detection and extinguishing capabilities for?
- Engines
- APU
- Cargo Compartments
- Lavatories
Pulling the fire extinguisher handle does what?
Closes Engine bleed, fuel, hydraulic and crossbleed shutoff valves
What buses supply the engine fire detection and engine fire extinguishing?
What buses supply the APU fire detection and APU fire extinguishing?
Engine fire detection: MAU1 (DC ESS BUS 1) and MAU 3 (DC ESS BUS 2)
Engine fire extinguisher: HOT BATT BUS 1 and HOT BATT BUS 2
APU fire detection: MAU 1 (DC ESS BUS 1) and MAU 3 (DC ESS BUS 2)
APU fire extinguisher: DC ESS BUS 2
What happens when the APU Fire extinguisher pushbutton is pressed?
- Discharges APU fire bottle
- Shuts down the APU through the APU Fadec
- Closes APU fuel shutoff valve (SOV)
- Displays EICAS Message
How long will it take the APU to automatically shut down on the ground if a fire condition is detected?
10 seconds
How many smoke detectors are in the forward and aft cargo compartment?
4 in the fwd
3 in the rear
After smoke detection in the fwd cargo compartment, what happens?
And the Aft cargo compartment?
Fwd Cargo compartment
- Air circulation fan shuts off
- The ventilation outflow valve closes
- The high-rate fire extinguisher bottle is armed
Aft Cargo compartment
- High rate fire extinguisher bottle is armed
The Cargo fire extinguishing system is comprised of? Where are they installed?
- 1 high rate extinguisher bottle
- 1 low rate extinguisher bottle
Centre avionics bay (can be used in fwd or aft cargo compartment)