Fire Protection

Question 1

How can the flight crew determine whether or not the lavatory fire extinguisher has been used?

Answer 1

No cockpit indication is available. The extinguisher is inspected by MX personnel.
Reference: OM Vol. 2, Section 2-7, Lavatory Fire Protection System

Question 2

What occurs when the fire handle is pulled?

Answer 2

When pulled, the fuel, hydraulic, bleed air and engine lip anti-icing shutoff valves of the associated engine are closed.
Reference: OM Vol. 2, Section 2-7, Fire Extinguishing

Question 3

How many smoke goggles are in the cockpit?

Answer 3

3.

Reference: OM Vol. 2, Section 2-16, Flight Crew Oxygen, OM Vol. 1, Section 3, Receiving Checklist.

Question 4

What generates a FIRE DET FAIL message?

Answer 4

Low pressure in the fire loop of the engine(s) and/or APU.

Reference: OM Vol. 2, Section 2-7, Fire/Overheat Detection System

Question 5

What happens when the APU EXT button is pressed?

Answer 5

When pressed, the APU fuel shutoff valve is closed, an APU shutdown is initiated (a stop request signal is sent to the FADEC) and the APU fire extinguisher bottle is discharged.
Reference: OM Vol. 2, Section 2-7, Controls and Indicators

Question 6

How many Halon fire extinguishers are available for the engines?

Answer 6

2 Halon fire extinguishers are installed and are useable by either engine. Reference: OM Vol. 2, Section 2-7, Fire Extinguishing

Question 7

Is APU fire detection and protection available when the aircraft is de-powered?

Answer 7

No.

Reference: OM Vol. 2, Section 2-5, DC Distribution Tables

Question 8

How does pulling a fire handle affect the hydraulic system?

Answer 8

Pulling the fire handle closes the hydraulic shutoff valve. Hydraulic pressure could still be supplied by the electric hydraulic pump on the associated side.
Reference: OM Vol. 2, Section 2-7, Section 2-11