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Study Guide > Fire Protection > Flashcards

Fire Protection Flashcards

1
Q
  1. Which bottle can be discharged into the APU?
A

Left bottle

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2
Q
  1. How do you know if a fire bottle has discharged?
A

CAS message

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3
Q
  1. Which tests are performed with Master Test switch?
A

Annunciator, smoke, passenger oxygen, and equipment overheat.

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4
Q
  1. How are fire handles normally locked in the stowed position?
A

With electrical solenoid

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5
Q
  1. What happens if a fire handle solenoid malfunctions?
A

A manual override button underneath each fire handle allows handle activation.

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6
Q
  1. What happens when a fire handle is pulled?
A

It shuts off fuel at tank, trips Generator Control Unit (GCU), and shuts off hydraulics in tail compartment.

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7
Q
  1. What happens if engine fire persists after discharging the first bottle?
A

Fire handle may be rotated to inboard DISCH 2 position to inject agent from left fire bottle into the engine.

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8
Q
  1. The smoke evacuation valve has how many positions?
A

Two (2): CLOSED and VENT SMOKE

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9
Q
  1. Fire testing, detection, and protection is available down to what source of power?
A

Main batteries only: not available with emergency batteries.

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10
Q
  1. What’s the location of smoke detector?
A

Ceiling of baggage compartment and lavatories.

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11
Q
  1. What happens when smoke evacuation valve is selected to VENT SMOKE position?
A

Smoke evacuation valve opens and baggage compartment air is vented overboard through vent on ceiling of baggage compartment. Air is exhausted overboard through right side wingto-body fairing near lavatory servicing.

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12
Q
  1. Can interior baggage compartment door be opened once baggage compartment is depressurized?
A

No, it’s impossible without equalizing the pressure between baggage compartment and cabin.

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13
Q
  1. If interior baggage compartment door is closed, what’s the process for reentry once baggage compartment is depressurized?
A

Place smoke evacuation valve back to CLOSED position and hold reset toggle UP for 10 seconds. This causes baggage compartment ventilation shutoff valve to reopen and restore airflow to compartment.

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14
Q
  1. Describe APU’s fire detection system.
A

It has seven foot helium filled tube secured to top of APU enclosure.

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15
Q
  1. What happens to APU during a fire?
A

ECU automatically shuts it down.

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16
Q
  1. Describe engine fire detection system.
A

Each engine has separate fire detector assemblies which contain two fire/overheat detector circuits, loop A and loop B, in parallel along a hard mounted rail.

17
Q
  1. What happens when Fire Test switch is depressed?
A

You get 13 indications: FIRE light illuminates on APU control panel, both red WARN indicators illuminate, both fire handles illuminate, both FUEL CONTROL switches illuminate, you get three (3) red CAS messages and three (3) CAs (two white and one amber), and fire bell sounds from nose wheel well on ground.

18
Q
  1. Describe the equipment overheat detection system.
A

A number of thermal switches are installed in aircraft interior to monitor temperature levels. They utilize two preset temperatures: 150°F and 250°F, depending on location and type of equipment monitored. Switches set at trip point of 150°F generate amber CAS message when that temperature is reached and switches set at trip point of 250°F generate red CAS message (generally amber for electrical and red for bleed air).

19
Q
  1. What’s the location of fixed bottles?
A

Two identical single shot fire bottles are mounted in tail compartment: pressurized by nitrogen and filled with Halon.

20
Q
  1. What happens if bottle becomes over pressurized due to excessive temperature?
A

Pressure relief disc seal ruptures, allowing bottle contents to escape into tail compartment.

21
Q
  1. What’s the location of portable fire extinguishers?
A

One Halon extinguisher in cockpit, one near galley and one in aft lavatory; a water extinguisher also comes standard.

Study Guide (17 decks)

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