FIRE DETECTION AND SUPRESSION SYS Flashcards
(4 cards)
How many sensors are in the fire detection system? What are they?
5 sensors
2 in each engine compartment
1 in the APU compartment
What do the fire detector sensors detect?
infrared radiation, not blue light (sunlight)
In the 1 position, what does the FIRE DETR TEST check?
the continuity of the three firewall-mounted detectors (No.1 eng, No.2 eng, and APU)
In the 2 position, what does the FIRE DETR TEST check?
the continuity of the two engine deck-mounted detectors (No. 1 and No. 2 engine)
What are the two fire bottles filled and charged with?
filled with Halon, charged with nitrogen
What does pulling aft on the fire T-handle accomplish?
arms the fire extinguishing system and mechanically places the fuel selector in the OFF position
When both the No.1 engine and APU T-handles have been actuated, which compartment will the fire bottles be discharged in?
into the compartment for the T-handle that was last actuated
When both the No.1 engine and APU T-handles have been actuated, which compartment will the fire bottles be discharged in?
into the compartment for the T-handle that was last actuated
List the 5 things that happen when you pull the APU fire T-handle.
- Removes electrical power from the APU fuel shutoff valve, allowing it to close
- Removes power from the prime boost pump
- Sends a stop signal to the DESU
- Arms the fire extinguisher system
- Positions the extinguisher directional control valve to the APU
What happens when you pull aft on the No.1 or No.2 engine T-handle?
arms the fire extinguishing system and mechanically places the fuel selector in the OFF position
When AC power is not available, which compartment has no fire extinguisher capability?
the No.2 engine compartment
What crash impact forces will activate the fire bottles? And into which compartments?
a multi-axis impact of 10gs will discharge one fire bottle into each engine compartment
