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Systems > FUEL > Flashcards

FUEL Flashcards

1
Q

What type of fuel system is described?

A

Crashworthy, suction-type system with self-sealing tanks and breakaway valves

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2
Q

What refueling methods are supported by the fuel system?

A
  • Pressure refueling
  • Gravity refueling
  • Helicopter In-Flight Refueling (HIFR)
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3
Q

Quick Function check of the Fuel System
-Can it prime its on engines - If i need to get light what can the system do - Unlike my car what does this fuel tank tell me more or less - Will I ever be surprised that Im running low

A
  • Priming the engines
  • Dumping fuel
  • Indicating fuel quantity
  • Warning of low fuel levels
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4
Q

What is the role of the prime/boost pump?

A

Primes all fuel lines if prime is lost and acts as a boost pump for APU start and operation

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5
Q

What happens if a low-pressure condition exists? ( Think Cautions)

A

1/#2 FUEL PRESS caution appears for the respective engine

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6
Q

What does the engine fuel filter bypass warning system consist of? ( Looking for 2 things, don`t over think it)

A
  • Impending bypass Pressure Differential Indicator (PDI)
  • Caution indicator
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7
Q

What caution appears when fuel bypasses the filter?

A

1/#2 FUEL FLTR BYPASS caution

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8
Q

Are fuel filters sensitive to water contamination?

A

No

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9
Q

What happens with the fuel selector levers in OFF position?

A

Selector valves are closed

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10
Q

What is the function of the FUEL PUMP selector switch?

A

Activates the prime/boost pump and allows fuel to enter all fuel lines prior to engine start

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11
Q

What does placing the FUEL PUMP switch to APU BOOST do?

A

Opens the APU fuel shutoff valve and activates the prime/boost pump

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12
Q

What occurs when the FUEL PUMP switch is set to FUEL PRIME?

A

Opens both engine prime shutoff valves for individual engine priming

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13
Q

What type of pump is installed in each main tank?

A

Electrically operated, submerged fuel boost pump

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14
Q

What is the purpose of the tank fuel boost pump?

A

Provides a positive fuel supply and a secondary means of priming the engines

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15
Q

What is the capacity ( Gallons) of the main fuel tanks in the fuel system?

A

Two 180-gallon tanks

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16
Q

What type of damage can the lower one-third of the main fuel tank seal?

A

Damage from rounds up to 14.2 mm

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17
Q

What type of damage can the upper two-thirds of the main fuel tank seal?

A

Damage from rounds up to 7.62 mm

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18
Q

What is the usable capacity ( Gallons) of the auxiliary fuel tanks in the Extended Range Fuel System (ERFS)?

A

194 gallons

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19
Q

How is the fuel level of the auxiliary fuel tanks monitored?

A

By a single gauge probe

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20
Q

For fuel loads of 2,400 to 3,700 pounds, which auxiliary tank should be fueled?

A

Only the FWD auxiliary tank

21
Q

True or False: The BOTH position of the ERFS control valve is used for ground refueling operations only.

A

True

22
Q

What does the fuel management control panel (FMCP) allow the crew to do?

A

Manual control of fuel transfer and dump, fuel boost pump, and precheck valve operation

23
Q

What is the fuel transfer system controlled by? ( The control Panel Name )

A

The FMCP

24
Q

What rate does fuel transfer occur at?

A

Approximately 350 pounds per minute

25
Q

What indicates that fuel transfer is in progress?

A
  • Green background with black text on the fuel quantity displays
  • FLOW light illuminates on the FMCP
  • TRANSFER IN PROGRESS appears on the MDs
  • FUEL XFER appears on the aircraft graphic
26
Q

What caution appears when a transfer/dump pump fails?

A

PUMP/VALVE FAIL caution

27
Q

Fill in the blank: The fuel quantity indicating system has how many.
-Fuel signal conditioners
-Capacitance-type fuel probes,
-low-level fuel thermisters

A

1 / 2 / 2

28
Q

What color does the digital fuel quantity display turn when the fuel quantity is 300 pounds or less in a main tank?

A

Yellow

29
Q

What activates the FUEL LOW caution?

A

When the fuel level in a main tank reaches 300 ±15 pounds

30
Q

How long must a fuel low condition be detected for the master caution to be displayed?

A

For a period greater than 5 seconds

31
Q

What happens to the MD fuel quantity indications after reaching the main fuel tank high-level shutoffs?

A

Returns to green text on a black background

32
Q

What is the function of the high-level shutoff floats in the fuel tanks?

A

To prevent overfilling of the main tanks

33
Q

When can the fuel dump system activated?

A

When the helicopter has weight off wheels

The fuel dump system allows for the dumping of fuel from the main tanks.

34
Q

What will the system dump down to if the system is functioning properly

A

down to approximately 300 pounds per side

35
Q

Where are the FUEL PUMP NO. 1 and FUEL PUMP NO. 2 circuit breakers located?

A

On the CABIN circuit breaker panel.

36
Q

Can fuel be dumped directly from the internal auxiliary fuel tank?

A

No

Fuel must first be transferred from the auxiliary fuel tank to the main tanks.

37
Q

What is the purpose of the single-point pressure refueling system?

A

To pressure refuel the fuel tanks on the ground with or without electrical power.

38
Q

How is the right fuel tank pressure filled during refueling?

A

Through an interconnect break-away valve from the left fuel tank.

39
Q

What happens if refueling of the auxiliary fuel tanks is not desired?

A

The tank must be disconnected at the bulkhead quick disconnect or the manual precheck lever must be moved to the PRECHECK position.

40
Q

What is the pressure refueling capability provided?

A

Standard 55-psi and closed circuit 15-psi pressure refueling capability.

41
Q

What does the precheck switch do on the pressure refueling panel?

A

Interrupts ground pressure refueling to indicate system operation status.

42
Q

What is the purpose of the HIFR system?

A

To facilitate in-flight refueling.

43
Q

What happens when the PRECHECK switch is depressed during HIFR?

A

It should stop the fuel flow.

44
Q

What occurs if fuel is contaminated during HIFR?

A

Flow is reduced to an extremely low level.

45
Q

What is the role of the GO/NO-GO canister?

A

To detect contamination in the fuel.

46
Q

Fill in the blank: The fuel dump system operates until fuel levels decrease sufficiently to allow _______ into the fuel dump lines.

A

air

47
Q

True or False: The auxiliary fuel tank precheck lever is spring-loaded.

A

False

The precheck lever remains in the selected position.

48
Q

What is the Fuel Signal Conditioner Job?

Bonus: Via what part does this process happen?

A

Fuel Levels signals from the fuel probes are converted to fuel weight signals and sent to the F/MD

Bonus: Flight management Computers

49
Q

What does the low level Fuel Thermistor do for its respective tank?

A

When the fuel level in a main tank reaches 300 ±15 pounds, the low-level fuel thermister activates the FUEL LOW caution.

Systems (10 decks)

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