Fire Protection Flashcards
How many hand held extinguishers are on the plane
3 - halon = flight deck, front left storage bin, front closet
1 - water = aft storage bin
How is a fire reported in a two loop system
Both loops must detect a fire. If one fails the computer knows and operates off one loop
What type detectors exist in the lav and cargo areas
LAV = normal smoke detector Cargo = lazier smoke detector
What happens after pushing the ENG FIRE PUSH
- Arms squibs
- Shuts off IDG
- Closes PRSOV valve
- Inhibits continuous ignition
- Closes fuel, hydraulic, pneumatic SOVs
What is protected by the fire loops
- APU
- Engines
- Leading edges
What’s the protection I the main landing gear bay
A single loop fire detection system
What happens if smoke is detected in the lav
Automatic discharge of the halon bottle
How many system fire bottles are on the aircraft
- 2 serve both engines
- 2 cargo
- 1 APU
What indications would you receive following an engine fire
- Master warning, triple chime
- Fire bell
- Fire push switch light
- L/R ENG FIRE warning
What’s the difference between a FIRE FAIL caution
FIRE SYS FAULT caution
FIRE SYS FAULT status
- FIRE FAIL caution = both loops have failed
- FIRE SYS FAULT caution = communication between AIRINC and FIDEX system is not happening
- FIRE SYS FAULT status = a single loop has failed
What bus is the engine fire push light on
DC emergency bus
Describe cargo bottle function
Both bottles blow but one is a fast release bottle and the other is a slow release over 60 minutes
Can you fight fire in both cargo compartments
No
Where are the cargo fire bottles located
PSM 10-20-13
Both are inside the right belly fairing
How is the lav fire extinguishing actuated
PSM 10-30-2
The end of each discharge nozzle is sealed with a heat sensitive capsule
What happens after pushing the FORWARD CARGO SMOKE PUSH switch light
Arms squibs
How many fire smoke detectors are located in the cargo compartment
3 in forward and 2 in aft
How many detectors must detect smoke in the cargo area in order to issue a cargo compartment smoke warning
2
During a fire what cancels the fire bell
Master warning switch light. It also cancels master warning and triple chime
What does an ENG BTL LO caution mean
Pressure in the bottle has dropped to a preset point through leakage or use
What happens after pressing the cargo BOTTLE ARMED PUSH TO DISCH switch light
Both bottles blow
