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ERJ 170 FIRE syst.
Fire detection system questions
| Question | Answer |
|---|---|
| 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
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