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United 737 SV study > United 737 Fire Protection/Warning Systems > Flashcards

United 737 Fire Protection/Warning Systems Flashcards

1
Q

Fire detection and extinguishing systems are located where on the 737?

A

APU, engines, Lavs, Cargo Compartments

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2
Q

The ____ powers engine overheat and fire detection

A

Battery Bus

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3
Q

What happens when the engine fire warning switch is pulled?

A

Closes fuel
Hydraulic shutoff
Closes Engine Bleed Air Valves
Disables the reserver,
Trips the respective generator control circuit breaker
Deactivates the engine driven hydraulic pump

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4
Q

When the FAULT/INOP and OVHT/FIRE TEST switch is placed inthe OVHT/FIRE position should the fault light illuminate?

A

NO!

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5
Q

On ground, APU fire indications occur?

A

Wheel Well APU fire warning horn sounds

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6
Q

The APU ground control panel contains the following in the main wheel well

A

APU Fire Warning Light
APU Bottle DISCHARGE Switch
APU Fire Control Handle
APU HORN Cutout switch

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7
Q

The Cargo Compartment Suppression System contains how many fire extinguisher bottles?

A

TWO

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8
Q

What should happen when pushing the Cargo TEST Switch

A

Both EXT Test Lights should illuminate green

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9
Q

If the OVHT DET switches are in the NORMAL position ____

A

detector loop A and B are active

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10
Q

The _____ light illumianted when both loops in one or both cargo compartments have failed.

A

DETECTOR FAULT

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11
Q

If the Cargo Fire Bottle Discharge DISCH light is illuminated (amber) what does it mean?

A

Indicates either extinguisher bottle has discharged

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12
Q

Cargo fire DISCH switch is pushed and the first extinguisher bottle is discharged- what happens after that?

A

A timer is set for 60 minutes to discharge the second bottle

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13
Q

The LAV Fire extinguisher would idicate what color that the heat activated nozzle has been discharged?

A

Aluminum

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14
Q

If OVHT DET switch is in normal and one engine overheat and fire detection loop fails, what happens?

A

The failed loop is automatically deactivated and the remaining loop functions as a single loop detector.

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15
Q

What does an illuminated amber FAULT light on the overheat fire protection panel indicate with the OVHT DET switch in NORMAL?

A

Both Detector loops for an engine have failed

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16
Q

What does an illuminated amber FAULT light on the overheat fire protection panel indicate with the OVHT DET switch selected to A?

A

The A detector loop for an engine has failed

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17
Q

Indications of an engine fire are?

A

All related engine overheat alert indications illuminate
The fire warning bell sounds, both master FIRE WARNING lights illuminate, the related engine fire warning switch illuminates.

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18
Q

The engine fire warning switches are unlocked by?

A

Illumination of an engine fire warning switch, illumination of an ENG OVERHEAT light or manually by pushing the fire warning switch override.

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19
Q

What occurs to the engine fuel system when pulling the engine fire warning switch up?

A

Closes both Engine Fuel Shutoff Valve at the HMU and the spar fuel shutoff valve

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20
Q

What occurs to the respective hydraulic system when pulling the engine fire warning switch up?

A

Closes hydraulic fluid shutoff valve and deactivates the engine driven hydraulic pump LOW PRESSURE light

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21
Q

When the Fire Warning BELL CUTOUT Switch is pushed it extinguishes both master FIRE WARN lights, silences the fire warning bell and ___

A

resets the system for additional warnings.

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22
Q

When positioning the EXT TEST switch to 1 or 2, circuit continuity from the squibs to ____ is verified.

A

Both engines and APU fire switches

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23
Q

What happens when placing the Fault/Inoperative (FAULT/INOP) and overheat/fire (OVHT/FIRE) TEST switch to the FAULT/INOP position?

A

Tests the overheat and fire detection loops on both engines and APU and wheel well fire detector

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24
Q

What happens when there is an illuminated APU Fire Warning Switch in the DOWN position?

A

Unlocks the APU fire warning switch

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25
Q

___ lights will illuminate during a number 1 engine overheat?

A
  1. ENG 1 OVERHEAT
  2. MASTER CAUTION
  3. OVHT/DET system annunciator
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26
Q

What does an illuminated red WHEEL WELL fire warning Light indicate?

A

A fire in the main gear wheel well

27
Q

An illuminated engine BOTTLE DISCHARGE light indicates

A

The related fire extinguisher bottle has discharged

28
Q

An illuminated APU DET INOP light indicates

A

APU detector loop has failed

29
Q

An illuminated APU BOTTLE DISCHARGE light indicates

A

APU bottle has discharged

30
Q

T/F? Pushing the Master Fire Warning (FIRE WARN BELL CUTOUT) on the glareshield have the same results as pushing the fire warning bell cutout switch on the overheat/fire protection panels.

A

TRUE

31
Q

What happens when pushing the FWD Cargo Fire ARM switch

A

Arms the extinguisher for the forward cargo compartment

32
Q

What happens when pressing either MASTER CAUTION light after both lights are extinguished?

A

Resets the annunciator light for further cautions

33
Q

Single failures in dual/redundant systems do not illuminate MASTER CAUTION light. How do you recall the system failure?

A

Pressing either system annunciator light panel

34
Q

If ___ are pressed, both Master Fire Warning lights are extinguished, the fire warning bell is silenced, and the system is reset for additional warnings.

A

Either MASTER FIRE WARNING light or the fire warning bell cutout switch

35
Q

What do the Cabin Altitude and Takeoff Config Warnings Commonly use when activated?

A

the same intermittent tone

36
Q

Conditions causing the takeoff config warning horn to sound?

A
  1. Training edge flaps skew or asymmetry
  2. Speed Brake lever not down
  3. Spoiler Control Valve is open providing pressured hydraulic fluid to the ground spoiler interlock valve.
  4. Stab Trim not in T/o Range
  5. Flaps not in T/o Config
  6. LE Devices not Configured for Takeoff
  7. Parking Brake
37
Q

Aircraft below 800’ RA in landing config- gear not down and locked?

A

Steady horn

38
Q

What conditions does pushing Landing Gear Warning Cutout Switch silence landing gear config warning aural?

A
  1. Flaps through 10 and below 800’ RA
39
Q

What does the PSEU Proximity Switch Electronic Unit monitor?

A

Takeoff and landing config warnings

Landing gear and air/ground sensing

40
Q

On the ground, what does an illumated PSEU indicate

A

A fault is detected in the PSEU or an overwing exit flight lock fails to disengage when commanded.

41
Q

The PSEU ___ in flight?

A

Is inhibited from thrust lever advance for takeoff until 30 seconds after landing.

42
Q

What does an illuminated Cabin Altitude Warning Light indicate?

A

at 10000’ if the cabin has not been pressurized

43
Q

What happens when the max operating airspeed of Vmo/Mmo is exceeded?

A

The Mach/Airspeed warning system provies an aural warning (clacker)

44
Q

The indication of an impending stall is ___?

A

An artificial stall warning device (stick shaker)

45
Q

The MACH AIRSPEED & STALL WARNING test switches are ___ while airbourne.

A

Inhibited

46
Q

When is altitude alerting inhibited?

A

G/S Captured
or
Trailing Edge Flaps 25 degrees or greater

47
Q

If the selected altitude is deviated by ___ feet, a momentary tone sounds, the current altitude box turns amber and ___

A

300

begins to flash

48
Q

What inhibits Ground Prox Warning System look ahead terrain and radio altitude based alerts?

A

Actual windshear warning

49
Q

“Terrain Terrain Pull UP” Solid RED on Nav Display. How long do we have?

A

20-30 Seconds

50
Q

“Caution, Terrain” Solid Amber on Nav Display. How long do we have?

A

40-60 Seconds

51
Q

In what speed realm does “Too Low Terrain” Aural alert occur if aircraft is at an unsafe terrain clearance with either the gear not down or flaps not int he landing config?

A

HIGH SPEED

52
Q

Excessive altitude loss after takeoff or go around aural alert?

A

“Don’t Sink”

53
Q

Volume and repetition of “GLIDESLOPE” aural alert rate ___ as deviation ____ below the glideslope

A

Increase; increase

54
Q

When are new predictive windshear warning alerts inhibited during takeoff and landing?

A

Between 100 knots and 50’ RA

55
Q

What does an illuminated INOP light on the Ground Prox panel alert the pilot to do?

A

A GPWS computer malfunction or power loss has occured

56
Q

In flight, the Ground Prox System Test (SYS TEST) switch is ____

A

Inhibited

57
Q

What does placing the Ground Prox FLAP INHBIT Switch to FLAP INHIBIT, inhibit?

A

“GROUND PROX TOO LOW FLAPS” alert

58
Q

What does placing the Ground Prox TERRAIN INHBIT Switch to TERRAIN INHIBIT, inhibit?

A

Look ahead terrain alerts and terrain displays

59
Q

When does the weather radar automatically begin scanning for windshear?

A

ALL ANSWERS ARE CORRECT

60
Q

What does placing the transponder Mode selector to TA (traffic Advisory) ONLY do?

A

Enables the display of traffic advisory targets

61
Q

What does placing the Transponder Mode Selector to TA/RA do?

A

Enables the display of traffic advisory targets and RA targets

62
Q

In which TCAS Altitude Range Switch Position Sets TCAS Display from 2700 feet below to 7000 feet above own aircraft?

A

ABV - Above (727)

63
Q

On the cartridge assembly (tails kid)- If the warning decal is ___ the cartridge must be replaced?

A

ALL RED

64
Q

Pulling the engine fire warning switch up___

A

Closes the engine bleed air valve

United 737 SV study (14 decks)

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