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c605 > Fuel > Flashcards

Fuel Flashcards

1
Q

Total fuel capacity of C605:

1) pressurized
2) gravity

A

1) 20,000 lbs

2) 15,722 lbs

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2
Q

The fuel tank system has 3 sections: ___, ___, and ___ for a total of ___ tanks.

A

1) Main (L/R wings)
2) Auxiliary (forward, center, aft)
3) Tail (tail cone, L/R saddle)
8 total tanks

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3
Q

The main (L/R wing) tanks can hold ___ lbs (___ gal) fuel each for a total of ____ lbs (___ gal).

A

4874 lbs (722 gal) each

total 9748 lbs (1444 gal)

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4
Q

The Auxiliary tanks can hold ___ lbs (___ gal)

A

7172 lbs (1062 gal)

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5
Q

The tail tanks can hold ___ lbs (___ gal)

A

3147 lbs (467 gal)

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6
Q

The maximum pressure for refueling is ___psi

A

50 psi

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7
Q

The ___ tank system can NOT be refueled by gravity

A

tail

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8
Q

Do NOT open overwing fuel caps unless wing tanks < ___% full (___ lbs)

A

93% (4500lbs)

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9
Q

The maximum structural imbalance between wing tanks during gravity refueling is ___ lbs

A

2500lbs

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10
Q

The L/R main tanks feed the ___ tanks located in the ___ tank via ___ or ___ pumps

A

collector tanks located in the center aux tank

gravity or scavenge ejector pumps

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11
Q

The APU is fed from the ___ fuel tank

A

R main tank

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12
Q

___ prevent fuel from surging toward the wing tips

A

flapper valves

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13
Q

The auxiliary tank is composed of ___ interconnected tanks. The ___ and ___ tanks gravity feed the ___ tank via ___ .

A

3 - forward, aft and center

aft and forward tanks gravity feed the center via primary and secondary transfer lines

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14
Q

The aux tanks feed the ___ tank via ___ pump when the ___ tank is < ___% full (___lbs)

A

wings tanks
transfer ejector pump
wing tank; 93% full (4600lbs)

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15
Q

The tail fuel tank system is composed of __(3)__ tanks that are ___ (separate or connected) and are located ___.

A

tail cone, L/R saddle tanks

separate (share a common sump manifold)
located: tail cone - tail; saddle tanks in aft equipment bay

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16
Q

The tail tank system supplies fuel to the ___ tanks by ____ pumps when the fuel system control unit (FSCU) senses < ___ lbs

A

Aux tanks by electric tail transfer pumps

7000 lbs

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17
Q

Can the crew manually control the scheduled tail tank transfer? If so, how?

A

the OVRD switch light

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18
Q

Fuel quantity is measured by ___ (#) DC-type probes and is corrected for aircraft’s attitude with information from ___

A

17 probes

IRS 1 and 2

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19
Q

How are the fuel tanks vented?

A

Wing and aux tanks - NACA scoops

Tail tanks share common vent line running down vertical fin and out the bottom of the fuselage

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20
Q

___ provides positive pressure to fuel tanks during flight

A

Ram air

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21
Q

There are ___ (#) manual vent valves:

If opened or popped indicating overpressure ___

A

1 each wing tip
1 beneath the center aux tank
1 left side of vertical fin for tail tanks

It must be reset before flight

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22
Q

There are ___ (#) ___-powered boost pumps.

The left boost pump is powered by the ___ bus;
The right boost pump is powered by the ___ bus

A

2; DC

L - DC BATT bus
R - DC Bus 2

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23
Q

The boost pumps are used for ___ and ___

A

engine start

backup fuel feed (low fuel pressure) - must be armed

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24
Q

The Main Ejector pumps are located ___, receive pressurized fuel from ___ and provide fuel to ___ and ___

A

on top of its collector tank

engine (FCU)

respective engine AND
motive flow supply to on-side transfer ejector pump

25
Q

Can the main ejector fuel pumps feed the cross-side engine? How or why not?

A

No; one-way check valve (tested during first flight of the day?)

26
Q

The scavenge ejector pumps are located ____, receive pressurized fuel from ___ and transfer fuel from ___ to ___ tanks.

A

lowest inboard point in each main (wing) tank

engine (FCU)

main (wing) tank to collector tank

27
Q

The Transfer Ejector Pumps are located ___, receives motive flow from ___ and continuously transfers fuel to the ___ tanks, maintaining them at ___%.

A

lowest point of the center aux tank
on-side ejector pump
main tanks; 93%

28
Q

The engine fuel shutoff valves are powered by the ___ bus and activated closed when you push the ___

A

DC EMER BUS

push the ENG FIRE PUSH switch

29
Q

A wash filter is installed along the motive flow feed lines from engine to main and scavenge ejector pumps. Its purpose it to ___

A

separate ice crystals and channel them to the larger main ejector pump protecting the smaller scavenge pump.

30
Q

The Fuel System Computer Unit (FSCU) is located in the ___. It has 2 channels with Channel 1 is ___ and Channel 2 is ___.

A

underfloor avionic/electronic bay

Ch 1 - primary; Ch 2 - standby with auto replace

31
Q

The FSCU is powered by ____ (4 buses)

A

DC ESS, DC BATT, APU BATT DIR and DC BUS 1

32
Q

The functions of the FSCU are: (3)

A

1) fuel quantity gauging
2) tail tank to aux tank auto fuel transfer
3) auto refueling shutoff

33
Q

Can fuel from the tail tank be transferred to the aux tank on the ground? If so, how? If not, why?

A

Not automatically via the FSCU but you can select manual override using the MANUAL OVRD switch light and selecting the PRI or SEC pumps
NOTE: pumps do NOT aut shutoff when tail tank is empty

34
Q

There are ___ (#) tail tank transfer pumps located in the ___. They transfer fuel to the ___ tank at ___ lbs/hr

A

2; sump of the tail tank system

aux tank; 1800 lbs/hr

35
Q

The ____ is pressurized with nitrogen, monitored by the FSCU and, when punctured, inhibits tail to aux tank fuel transfer

A

Rotor Burst Protection shroud

36
Q

The Rotor burst protection shroud’s purpose is to ___. It is pressurized with ___ and monitored by the ___.

A

inhibit tail to aux fuel transfer

nitrogen; FSCU

37
Q

In order to dump fuel the flaps must be at ___ and the dump switch must have power (___ bus)

A

0 deg; DC BATT bus

38
Q

Fuel can be dumped at a rate of ___ lbs/min. It takes approximately ___ to empty a full tail tank. After ___ min of fuel dumping the ___ caution message appears.

A

100-120 lbs/min

30 min

5 min; DUMP VALVE OPEN

39
Q

Max fuel imbalance on the ground is ___ lbs

Max fuel imbalance in the air is ___ lbs

A

400 lbs

800 lbs

40
Q

When will you get a FUEL IMBALANCE message inflight with < 800lbs split?

A

with fuel imbalance > 400 lbs and flaps at 20 deg or greater

41
Q

There are ___ (#) DC-powered crossflow valves located in the ___ tank: __, ___, and ___.

A

3; aux tank: L/R aux flow and gravity flow

42
Q

___ prevents both L and R to AUX valves open at the same time

A

INTERLOCK

43
Q

FUEL XFLOW SOV OPEN message will appear after ___ delay and the fuel imbalance is < ___ lbs

A

50 sec delay; < 100lbs

44
Q

The L/R AUX crossflow valves move ___ tank fuel to the ___ tank.

The gravity crossflow valve moves ___ tank fuel to ___ tank

A

one wing tank fuel to the aux tank

wing tank fuel to wing tank

45
Q

Both refueling panels are powered by the ___ bus

A

APU BATT DIR bus (APU Battery must be connected)

46
Q

The ___ refueling panel has priority over the ___ refueling panel.

The ___ refueling panel has a kill switch while the other does not.

A

cockpit ; external

external

47
Q

Start refueling at ___ psi for approximately ___ sec then increase truck pressure to ___ psi to avoid venting fuel

A

35 psi;
15-20 sec;
50 psi

48
Q

Can the aux tank be fueled by itself?

A

No; must be selected with Tail tank (FSCU prevents)

49
Q

What happens if the fuel pressure is interrupted to the AUX tank for > 30 sec?
Can this be overrided?

A

FSCU closes TAIL and AUX SOVs

Can be overrided by holding the OVERRIDE button OR cycle power switch on refueling panel OFF then FUEL

50
Q

Aux tank fuel quantity indications are generated using probes in the ___ and ___ tanks

Aux tank quantity only accurate ___ to ___ minutes after refueling stops and the tanks have equalized

A

forward and center AUX tank

1 to 8 min

51
Q

What does the OVERRIDE button on the refueling panel do?

A

allows individual fueling/defueling of the aux and tail tanks

provided the high level sensor has not been triggered in the selected tank

52
Q

Bulk fuel temperature probe is located in the ___ tank.

Bulk fuel temp readout turns amber at < ___ deg C

A

L wing tank

-37 deg C

53
Q

Fuel from the ___ tank cools the APU generator controller

A

R wing tank

54
Q

The engine fuel temperature probe is located after the ___.

The engine fuel temp readout turns amber < ___ deg C

NOTE: If get FUEL TEMP LO you might get FUEL FILTER caution as well

A

after the fuel/oil heat exchanger

5 deg C

55
Q

Main tank fuel quantity readout turns amber < ___ lbs

Total fuel quantity readout turns amber < ___ lbs

A

500 lbs

500 lbs

56
Q

T/F: the collector tank fuel is not part of fuel quantity

A

true

57
Q

APU fuel is drawn from the ___ tank

A

Right wing

58
Q

Fuel flow indications turn amber and display dashed line if ____ or ___

A

> 5000 pph OR

input value is invalid

c605 (10 decks)

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