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SAAB 340B > SAAB 340B Fire Protection > Flashcards

SAAB 340B Fire Protection Flashcards

1
Q

How is tailpipe overheating detected?

A

By 3 temperature sensors located around each engine tailpipe

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2
Q

TAIL P HOT Lights (red) indicates?

A

Tailpipe overheating is detected on the related engine

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3
Q

When will the light(s) extinguish?

A

Only when the temperature decreases sufficiently

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4
Q

How is engine fire detection accomplished?

A

By electronic controllers which monitor the respective nacelle for excess temp increase

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5
Q

Electronic controllers receive power from?

A

The Emergency Bus

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6
Q

Fire detection results in? (4 items)

A

Illumination of associated FIRE handle - Firebell activation

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7
Q

Fire detection results in? (4 items)

A

Illumination of associated FIRE handle - Master warning alerting

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8
Q

Fire detection results in? (4 items)

A

Illumination of associated FIRE handle - Respective flashing red ENG FIRE

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9
Q

How are the warning flashers and firebell cancelled?

A

Depressing either master warning flasher or Pulling illuminated FIRE handle

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10
Q

How long will the FIRE handle and CWP indication remain illuminated?

A

Until the nacelle temperature decreases sufficiently

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11
Q

How does the engine fire detection loops work?

A

Heat buildup causes the loops resistance to decrease which activates engine fire alerting

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12
Q

What defines a short circuit of the fire detection loop?

A

A rapid decrease in loop resistance and renders the loop unreliable

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13
Q

Amber FIRE DET FAIL light illuminated?

A

Flashing when a short circuit is detected in the fire loop on the related engine - Remains illuminated as long as short circuit condition exits

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14
Q

Location of the engine fire extinguisher bottles?

A

Equipment compartment of each engine nacelle

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15
Q

Can each bottle be used for the other engine?

A

Yes, bottles are interconnected to permit selective discharge to either engine nacelle

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16
Q

When are the FIRE EXTG switches armed?

A

Only when an engine FIRE handle is pulled

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17
Q

What is the purpose of the FIRE EXTG switch?

A

Electrically fires a pyrotechnic squib which punctures the port pressure seal for release of the Halon agent

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18
Q

The left main and right reserve squibs are supplied by what electrical bus?

A

Left Hot Battery Bus

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19
Q

The right main and left reserve squibs are supplied by what electrical bus?

A

Right Hot Battery Bus

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20
Q

What are the oral warnings of an ENG FIRE, TAIL P HOT and FIRE DET FAIL?

A

ENG FIRE - Fire Bell

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21
Q

What are the oral warnings of an ENG FIRE, TAIL P HOT and FIRE DET FAIL?

A

TAIL P HOT - Repetitive Chime (Triple)

22
Q

What are the oral warnings of an ENG FIRE, TAIL P HOT and FIRE DET FAIL?

A

FIRE DET FAIL - Single Chime

23
Q

Name the 5 actions that take place when the FIRE handle is pulled?

A

Main and Reserve squibs are armed

24
Q

Name the 5 actions that take place when the FIRE handle is pulled?

A

Fire Bell, Master Warning are cancelled

25
Q

Name the 5 actions that take place when the FIRE handle is pulled?

A

Generator field relay opens

26
Q

Name the 5 actions that take place when the FIRE handle is pulled?

A

HP, Engine bleed valve closes

27
Q

Name the 5 actions that take place when the FIRE handle is pulled?

A

Fuel shutoff valve closes

28
Q

Which aircraft compartments have smoke detection?

A

Avionics compartment

29
Q

Which aircraft compartments have smoke detection?

A

Lavatory

30
Q

Which aircraft compartments have smoke detection?

A

Cargo compartments

31
Q

What the sources of power?

A

Avionics compartment - Left Battery Bus

32
Q

What the sources of power?

A

Lavatory - Right Battery Bus

33
Q

What the sources of power?

A

Cargo compartments - Right Battery Bus

34
Q

AVIONIC SMOKE (red) indicates?

A

Illuminates flashing when smoke is detected in the avionics rack and remains illuminated until smoke dissipates sufficiently

35
Q

LAV SMOKE (red) indicates?

A

Illuminates flashing when smoke is detected in the lavatory and remains illuminated until smoke dissipates sufficiently

36
Q

CARGO SMOKE (red) indicates?

A

Illuminates flashing when smoke is detected in the cargo compartment and remains illuminated until smoke dissipates sufficiently

37
Q

How many Halon extinguishing bottles are available for the Cargo compartments?

A

2

38
Q

Where are they are located?

A

Aft of the C2 cargo compartment

39
Q

What type of bottles are they?

A

Dual-wall, a bottle within a bottle

40
Q

How are the cargo fire Halon bottles activated?

A

FIRE EXT switches located on the CARGO FIRE EXTG panel

41
Q

When discharged what happens?

A

Outer bottle rapidly floods the compartment - Inner bottle slowly discharges to maintain a high concentration of Halon

42
Q

With both bottles discharged how long is the fire suppression time?

A

60 minutes

43
Q

Aircraft limitations require that the fire bottles not be discharged within how many minutes of each other?

A

2 Minutes

44
Q

What is the reason for this limitation?

A

Prevent excessive pressure buildup within the compartment and subsequent blowout of the pressure relief panel

45
Q

Illumination of the CARGO EXTG (white) light indicates?

A

Low pressure is detected in the respective fire bottle

46
Q

How long will it take for this light to illuminate?

A

Up to 15 minutes

47
Q

How is fire extinguished within the avionics rack?

A

With the Halon extinguisher located behind the FO seat, it is discharged through a port located on the upper bulkhead behind the Captain

48
Q

How is the Halon distributed?

A

The port is connected to a manifold which directs the agent into all areas of the avionics rack

49
Q

How is fire extinguished in the lavatory?

A

Halon extinguisher which protects the lavatory trash bin

50
Q

How is the Halon extinguisher activated?

A

Discharges automatically via blowout of a heat-sensitive plug

SAAB 340B (8 decks)

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