🔥Fire Detection/Protection Flashcards
What systems have 🔥 protection n detection?
Engines
APU
Cargo compartments
Lavs
Recir Bay (Smoke Detection only)
Cockpit and Cabin 🔥 fighting protection?
Yes
Cockpit 1 hand held Halon fire extinguisher
Cabin; 3 hand held Halon fire extinguishers + 1 water extinguisher
Engine , ApU fire protection is?
Engines : 2 Halon fire bottles
APU: 1 Halon fire bottle only for apu
Power source for Eng/Apu fire protection n detection?
Eng detection DC ESS BUS
ENG protection HOT BATT BUS
APU detection. DC ESS BUS
APU protection….DC ESS BUS
How is fire detection system for Eng?
APU?
Engine has 8 pneumatic fire detection (2 loops) per engine
APU has 2 pneumatic fire detectors ( 2 loops)
What happens when Fire handle pulled?
Eng fuel SOV closes
Eng HYD SOV closes
Eng Bleed SOV closes
APU fire indications?
Fire bell
Red stripe in EMER STOP button
APU FIRE message on EICAS
APU auto shutdown when fire?
Only on the ground ❗️
What happens when APU EMER STOP button pushed after fire?
APU shut off immediately without 1 min cooldown
APU fuel SOV closes
APU FIRE EXTG button illuminates (bottle armed)
What happens if APU EMER STOP not pushed after 🔥 detected?
After 1 min, APU FIRE EXTG button illuminates ( bottle armed )
APU fire extinguisher auto discharge???
NO
Smoke detectors in cargo, how many?
3 detectors in FWD cargo
2 detectors in AFT cargo
What happens in FWD cargo if smoke detected?
Recir fan shut off
Ventilation Outflow valve closes
Fwd cargo smoke button illuminated
How many Fire extinguisher bottles for cargo ?
Types?
1 high rate bottle , fast discharge
1 low rate bottle , 60 mins active discharge
Can ONLY be both used for ONE compartment fire
Lav fire protection is?
Heat sensitive extinguishers in Lav waste bins AUTO discharge if predetermined temp is reached
