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Mesa EJET > Fire Detection / Protection > Flashcards

Fire Detection / Protection Flashcards

1
Q

Engine Fire Detection

A
  • DC ESS powered
  • 2 fire loops in each engine
  • Both loops must detect an overheat to get a fire indication unless one loop is inop
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2
Q

How is Engine Fire Protection powered?

A

-HOT BATT BUS powered (2 bottles)

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3
Q

How many engine fire bottles? How many shots per bottle?

A

2 fire bottles, 1 shot per bottle

-Both shots to one engine or one shot to each

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4
Q

What happens when fire handle is pulled?

A
  • Fuel valve is closed
  • Hydraulic valve is closed
  • Bleed valve is closed
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5
Q

How long does fire handle and ITT warnings stay illuminated?

A

Until no indication of fire exists

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6
Q

APU Fire Detection

A
  • DC ESS powered
  • 2 fire loops
  • Both loops must detect an overheat to get a fire indication unless one loop is inop
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7
Q

How is APU fire protection powered (1 fire bottle)?

A

DC ESS powered

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8
Q

APU Fire

APU EMER STOP button RED light illuminates

A

APU EMER STOP button………PUSH IN

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9
Q

When does the APU FIRE EXTINGUISHER button illuminate?

A

When APU EMER STOP button is pressed or one minute after alarm if no further action is taken?

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10
Q

When does the APU FIRE EXTINGUISHER button extinguish?

A

When fire is no longer detected

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11
Q

How is Cargo smoke detection powered?

A

ESS powered

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12
Q

How many smoke detectors do the cargo compartments have?

A
  • FWD cargo has 3
  • AFT cargo has 2

2 in in both must be in agreement in order for a FWD/AFT CARGO warning

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13
Q

What happens after smoke is detected in cargo compartments?

A

Circulation fan automatically turns off and the ventilation outflow valve closes

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14
Q

How many cargo compartment fire bottles?

A

2 (able to extinguish fire in either compartment)

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15
Q

Cargo smoke INDICATION in flight

A

Push button 1 time

-High rate bottle fires, low rate bottle arms and fires after 60 seconds

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16
Q

Cargo smoke INDICATION on ground

A

Push button 2 times

  • 1st push–high rates bottle fires, low rate bottle arms
  • 2nd push–low rate bottle fires
17
Q

Cargo smoke, NO INDICATION in flight

A

Push 3 times

  • 1st push, high rate bottle arms
  • 2nd push, high rate bottle fires
  • 3rd push, low rate bottle fires (after 60 seconds if not pushed 3rd time)
18
Q

Cargo smoke, NO INDICATION on ground

A

Push 3 times

  • 1st push, high rate bottle arms
  • 2nd push, high rate bottle fires, low rate bottle arms
  • 3rd push, low rate bottle fires
19
Q

How long does the high rate bottle last?

A

1 minute

20
Q

How long does the low rate bottle last?

A

60 minutes

21
Q

Lavatory Protection

A

1 fire bottle in waste container

-wax plug melts at a given temperature to discharge the bottle

22
Q

FIRE DETECTION SYSTEM TEST

“6-2-7” Rule

Overhead panel- 6 lights

A

Overhead Panel (6 lights)

  • 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)
23
Q

FIRE DETECTION SYSTEM TEST

“6-2-7” Rule

Glare shield (2 lights)

Aural (2)

A
  • Master Warning light (left)
  • Master Warning light (right)
  • Fire bell
  • Triple chime
24
Q

FIRE DETECTION SYSTEM TEST

“6-2-7” Rule

EICAS (7)

A
  • ENG 1 FIRE
  • ENG 2 FIRE
  • CARGO FWD SMOKE
  • CARGO AFT SMOKE
  • APU FIRE
  • FIRE on engine 1 ITT gauge
  • FIRE on engine 2 ITT gauge
25
Q

What engine systems have fire detection and protection?

A
  • Engines
  • APU
  • Cargo compartments
  • Lavatories
26
Q

How many fire extinguishers in cockpit and cabin?

A

Cockpit, 1 halon

Cabin, 3 halon (2 fwd, 1 aft), 1 water (aft)

27
Q

How are the engines and APU protected from fire?

A

Engines, 2 halon bottles

APU, 1 halon fire bottle

28
Q

Can both engine fire bottles be used for one engine?

A

Yes

29
Q

Describe engine and APU fire detection system?

A

8 engine pneumatic fire detectors (2 loops) per engine, 2 APU pneumatic fire detectors (2 loops)

30
Q

What happens when an engine fire handle is pulled?

A
  • Closes respective engine fuel SOV
  • Closes respective engine hydraulic SOV
  • Closes respective engine bleed SOV
31
Q

What is the indication of an APU fire?

A
  • Fire bell
  • Red stripe in the EMER STOP button
  • APU FIRE is displayed on EICAS
32
Q

Is the APU automatically shut down if a fire is detected?

A

Only on the ground

33
Q

What happens when the APU EMER STOP button is pushed after a fire has been detected?

A
  • APU shuts off immediately (no cool down)
  • APU fuel SOV closes
  • APU FIRE EXTG button illuminates (will illuminate after one minute if fire detected and APU EMER STOP button not pushed)
34
Q

Will the APU fire extinguisher automatically discharge?

A

No

35
Q

How many smoke detectors in the cargo compartments?

A

3 detectors in FWD

2 detectors in AFT

36
Q

What happens to the FWD cargo compartment in the event smoke is detected?

A
  • Recirculating fan shuts off (prevents oxygen from entering the compartment)
  • Ventilation outflow valve closes (prevents halon from escaping into the passenger cabin)
37
Q

How many extinguishing bottles are installed for the cargo compartments?

A

2 bottles for both compartments

  • 1 high rate
  • 1 low rate
38
Q

Can one bottle be used for one compartment and the other bottle for the other compartment?

A

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

Mesa EJET (10 decks)

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