Smoke/Fire

Question 1

What Extinguishing Agent is used in the Fire Bottles?

Answer 1

HALON

Question 2

Where are the Engine Fire Detection sensing elements located?

Answer 2

• Fixed Cowl.
• Accessory Gearbox;
• Engine Core;

Question 3

What must happen to activate the Fire Warning System?

Answer 3

• Both paired loops in a section must sense heat;
• If 1 loop is inoperative, the remainder loop will activate the FIRE Warning.

Question 4

How is the Fire Detection/Suppression for the Baggage Compartment provided?

Answer 4

• Smoke Detectors;
• BTL 1 can be discharged into the baggage compartment.

Question 5

During an Engine Fire, what 5 indications come on?

Answer 5

• 1. The respective L/R ENG FIRE PBA illuminates;
• 2. Red L/R ENG FIRE CAS message displays;
• 3. FIRE icon in the N1 gauge;
• 4. Aural Warning voice message, Left (Right) Engine Fire;
• 5. Master Warning PBA flashes Red on the glareshield.

Question 6

What 6 events occur when the L/R ENG FIRE PBA is pressed?

Answer 6

• 1. Firewall Fuel Shutoff Valve closes;
• 2. Hydraulic SOV closes;
• 3. Engine PRSOV closes;
• 4. Generator is taken offline;
• 5. Ignition is disabled;
• 6. BTL 1 & BTL 2 PBAs illuminate green AVAIL to indicate Armed.

Question 7

Does pressing the ENG FIRE PBA command an immediate Engine Shutdown?

Answer 7

• NO. The FIRE PBA closes the Fuel feed SOV at the firewall. Engine will run a few sec to empty the line.
• Immediate Shutdown is via the ENGINE RUN switch per the checklist
• Note: The ENGINE RUN switch closes the HPSOV in the fuel metering unit.

Question 8

What 5 events occur when APU FIRE PBA is pressed?

Answer 8

• 1. APU Firewall Fuel SOV closes;
• 2. APU Fuel Control Unit shuts off the fuel;
• 3. APU Bleed Control Valve (BCV) is closed;
• 4. APU Generator is taken offline;
• 5. BTL 2 PBA illuminates green AVAIL to indicate Armed.

Question 9

If an APU Fire is detected on the Ground, what’s the automatic shutdown/extinguishing sequence events?

Answer 9

• 1. APU FIRE Warning Horn sounds outside the airplane;
• 2. APU BCV closes
• 3. FIDEEX triggers APU Shutdown;
• 4. Within 10 seconds of detection, BTL 2 discharges.
     NOTE: The APU may be left unattended.