170 Fire

• • Engines
• • APU
• • Cargo Compartments
• • Lavatories

• Yes

• Cockpit 1 hand-held Halon fire extinguisher

• Cabin 4 hand-held Halon Fire extinguishers (2 fwd & 2 aft)

• Engines 2 Halon fire bottles

• APU 1 Halon fire bottle dedicated to the APU only

yes

• • Engine Detection            DC ESS
• • Engine Protection           HOT BATT
• • APU Detection               DC ESS
• • APU Protection              DC ESS

• Engine 8 pneumatic fire detectors (2 loops) per engine

• APU 2 pneumatic fire detectors (2 loops)

• • Press and hold the test button on the overhead panel for a minimum of 3 seconds, but no more than 10seconds if the APU is running or it will automatically shutdown the APU
• • Aural warnings? Fire bell? Triple chime

• Visual indications?

Overhead panel• Fire handle 1• Fire handle 2• Cargo smoke (FWD) extinguisher button• Cargo smoke (AFT) extinguisher button• APU extinguisher button• APU EMER STOP (top half of button)?

Glareshield• Master warning light (left)• Master warning light (right)?

EICAS• ENG 1 FIRE (CAS message)• ENG 2 FIRE (CAS message)• CARGO FWD SMOKE (CAS message)• CARGO AFT SMOKE (CAS message)• APU FIRE (CAS message)• FIRE (Engine 1 ITT gauge)• FIRE (Engine 2 ITT gauge)

• • Closes respective engine fuel SOV
• • Closes respective engine hydraulic SOV
• • Closes respective engine bleed SOV

• • Fire bell
• • Red stripe in the EMER STOP button
• • APU FIRE is displayed on the EICAS

Only on the ground

• • APU shuts off immediately without a 1-minute cool-down
• • APU fuel SOV closes
• • APU FIRE EXTG button illuminates

After one minute the APU FIRE EXTG button illuminates

no

• • 3 detectors in the FWD compartment
• • 2 detectors in the AFT compartment

• • Recirculation fan shuts off
• • Ventilation outflow valve closes

• • Prevents oxygen from entering the compartment
• • Prevents Halon agent from escaping into the aircraft’s cabin

• • 2 bottles used for both compartments
• • 1 high-rate bottle and 1 low-rate bottle

• • High-rate bottle saturates the compartment immediately
• • Low-rate bottle maintains saturation over a duration of time

60 minutes

No. Only one compartment may be selected (FWD or AFT)

• 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

Yes, by pushing the extinguishing button again

The extinguishing button must be pushed again

• Yes. The high-rate bottle extinguishing button must be pushed twice, once to arm the bottle and once todischarge the bottle

• The low-rate bottle automatically discharges after one minute if in flight

Heat-sensitive extinguishers in the lav waste bins automatically discharge if a predetermined temperature is reached