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ERJ 170 FIRE syst.

Fire detection system questions

QuestionAnswer
What airplane systems have fire detection and protection? • Engines• APU• Cargo Compartments• Lavatories
Are the cockpit and cabin protected from fire? • Yes• Cockpit 1 hand-held Halon fire extinguisher• Cabin 4 hand-held Halon Fire extinguishers (2 fwd & 2 aft)
How are the engines and APU protected from fire? • Engines 2 Halon fire bottles• APU 1 Halon fire bottle dedicated to the APU only
Can both engine fire bottles be used for one engine if needed? • Yes
What is the power source for engine and APU fire detection and protection? • Engine Detection DC ESS• Engine Protection HOT BATT• APU Detection DC ESS• APU Protection DC ESS
Describe the engine and APU fire detection system • Engine 8 pneumatic fire detectors (2 loops) per engine• APU 2 pneumatic fire detectors (2 loops)
What happens when an engine fire handle is pulled? • Closes respective engine fuel SOV• Closes respective engine hydraulic SOV• Closes respective engine bleed SOV
What is an indication of an APU fire? • Fire bell• Red stripe in the EMER STOP button• APU FIRE is displayed on the EICAS
Will the APU automatically shutdown if a fire is detected? • Only on the ground
What happens if the APU EMER STOP button is pushed after a fire has been detected? • APU shuts off immediately without a 1-minute cool-down• APU fuel SOV closes• APU FIRE EXTG button illuminates
What happens if the APU EMER STOP button is not pushed after a fire has been detected? • After one minute the APU FIRE EXTG button illuminates
Will the APU fire extinguisher automatically discharge? NO
How many smoke detectors are installed in the cargo compartments? • 3 detectors in the FWD compartment• 2 detectors in the AFT compartment
What happens to the forward cargo compartment in the event smoke is detected? • Recirculation fan shuts off• Ventilation outflow valve closes
What is the purpose of this (refer to above question)? • Prevents oxygen from entering the compartment• Prevents Halon agent from escaping into the aircraft’s cabin
How many extinguishing bottles are installed for the cargo compartments? • 2 bottles used for both compartments• 1 high-rate bottle and 1 low-rate bottle
What is the difference between the high-rate bottle and the low-rate bottle? • High-rate bottle saturates the compartment immediately• Low-rate bottle maintains saturation over a duration of time
How long will the low-rate bottle remain active in the compartment? • 60 minutes
Can one bottle be used for one compartment and the other bottle for the other compartment? . Only one compartment may be selected (FWD or AFT)
What happens when a cargo extinguishing button is pushed if smoke has been detected? • High-rate bottle discharges immediately• Low-rate bottle discharges after one minute if the airplane is in flight• If airplane is on the ground (weight-on-wheels) the low-rate bottle will NOT automatically discharge
During flight, can the low-rate bottle be discharged before the minute is up? • Yes, by pushing the extinguishing button again
How can the low-rate bottle be discharged if the airplane is on the ground (weight-on-wheels)? • The extinguishing button must be pushed again
Can cargo extinguishing be used if no smoke is detected? • Yes. The high-rate bottle extinguishing button must be pushed twice, once to arm the bottle and once to discharge the bottle• The low-rate bottle automatically discharges after one minute if in flight
How are the lavs protected from fire? • Heat-sensitive extinguishers in the lav waste bins automatically discharge if a predetermined temperature is reached
Created by: rah170