ATR 72 – Fire protection - SmartCockpit - Airline training guides, Aviation, Operations, Safety

The avionics extract air duct includes a smoke detection device (ionization type), connected with the FWS.

Smoke detection between the avionics compartment and the cockpit duct air activates a 'ELEC SMK' red alert on EWD.

Smoke detection in the avionics compartment activates a 'ELEC SMK' red alert on EWD.

Smoke detection between the avionics compartment and the extract fan activates a 'ELEC SMK' red alert on EWD.

Correct! Wrong!

Is it possible to discharge a fire bottle without pulling the fire shut-off handle?

No.

Yes.

Correct! Wrong!

Forward and aft cargo each include one photoelectric fire detection and smoke detector.

True.

False.

Correct! Wrong!

Forward and aft cargo each include one photoelectric smoke detector (no fire detection). Reflection measurement monitors ambient transmittance. In case of smoke detection, "SMOKE" signal is sent to FWS through the MFC.

The detection principle is based on the variation of resistance and capacitance of the detection cable (fire signal). If there is only a change in resistance, associated loop will be reported failed by the fire detection control unit (fault signal).

False.

True.

Correct! Wrong!

The Avionics smoke detector is supplied by the:

AC STBY BUS

DC EMER BUS

DC ESS BUS

Correct! Wrong!

Fire Detection is available for:

Each engine nacelle fire, Left and right nacelle overheat (on ground only), and each cargo compartment.

Each engine nacelle fire, Left and right nacelle overheat (on ground only), each cargo compartment and toilets smoke, avionics compartment smoke.

Each engine nacelle fire, Right nacelle overheat (on ground only), each cargo compartment and toilets smoke, avionics compartment smoke.

Correct! Wrong!

The right nacelle includes an overheat detector. On ground, when the right nacelle temperature exceeds 170 deg.C, a red NAC OVHT label appears on EWD, and the FWS activates the NAC OVHT warning with the associated Master Warning light and CRC sound.

Engine Fire Extinguishing System - The fire extinguishing agent in the bottles is pressurized by:

Halon

Nitrogen.

Freon

Correct! Wrong!

Each engine is equipped with a fire detection system which consists of:

Two identical detection loops (A and B) mounted in parallel and a fire detection control unit.

Two crosstalk detection loops (A and B) mounted in parallel, a fire detection control unit and a fire management control unit (FMCU).

Two identical detection loops (A and B) mounted in parallel, a fire detection control unit and a fire management control unit (FMCU).

Correct! Wrong!

Toilets Wastebin Fire Extinguishing System - The fire extinguishing system operates automatically when the temperature in the wastebin exceeds:

82 deg.C.

92 deg.C.

77 deg.C.

Correct! Wrong!

AFT COMPT/LAV FANS pb - When the FAULT light comes on amber and the FWS is activated:

The AFT COMPT / LAV fan detection system is out of order and the two fans have been deactivated.

The fan is out of order.

The AFT COMPT / LAV fan detection system is out of order and at least one fan has been deactivated.

Correct! Wrong!

CL Fuel Light - Comes on red when receives fire signal from associated engine. The light will go off:

Only when fire detection signal is no longer sensed.

After CL is set to fuel shutoff position or if fire detection signal is no longer sensed.

After CL is set to fuel shutoff position and when fire detection signal is no longer sensed.

Correct! Wrong!

The handle integrates an ENG FIRE warning light. The light comes on red and the FWS is activated as long as the respective engine fire warning is activated (independently of handle position).

False.

True.

Correct! Wrong!

Light goes off when the temperature detected by the loops drops below warning threshold.

ENG FIRE appears on EWD when:

Fire signal detected by both loops A and B, or Fire signal detected by one of the loops if the other one is selected OFF.

Fire signal detected by both loops A and B (in flight) or fire signal detected by one of the loops (on ground only).

Fire signal detected by both loops A and B, or Fire signal detected by one of the loops if the other one is in fault.

Correct! Wrong!

AGENT pushbuttons control the ignition of squibs and resultant discharge of fire extinguisher bottles. The DISCH light comes on amber when:

The related fire extinguisher bottle is depressurized after discharge.

AGENT pushbutton of the related fire extinguisher bottle has been activated.

The related fire extinguisher bottle has been activated or when it is empty.

Correct! Wrong!

Which of the following busses power the engine fire detection systems, the fire handles and the extinguisher bottles discharge systems?

DC BUS 1 for the left engine and DC BUS 2 for the right engine.

AC STBY BUS in flight and DC EMER BUS on ground.

DC EMER BUS.

Correct! Wrong!

ATR 72 – Fire protection