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DO228 type rating > section 7- fuel system > Flashcards

section 7- fuel system Flashcards

1
Q

what does the fuel system consist of?

A

2 independent systems which can be connected by crossfeed

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2
Q

what does each independent fuel system feed during normal operation?

A

the corresponding engine

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3
Q

what 4 components make up each fuel tank system?

A
  • fuel tanks
  • fuel booster pumps
  • jet pumps
  • fire cock
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4
Q

how many fuel tanks in each fuel tank system?

A

3 (outboard, inboard and feeder)

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5
Q

what is the total usable fuel?

A

2386 litres

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6
Q

what 5 components do the outboard and inboard tanks contain?

A
  • jet pumps
  • fuel quantity trnsmitters
  • drain valves
  • vent lines
  • magna-stick level indicator
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7
Q

what 5 components do the feeder tanks contain?

A
  • booster pumps
  • fuel quantity transmitter
  • drain valves
  • fuel low level transmitter
  • crossfeed shutoff valve (LH system only)
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8
Q

where is the defueling quick disconnect?

A

in the engine nacelles

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9
Q

what do the flapper valves allow?

A

fuel gravity flow int the feeder tank in case of boost pump failure or during refueling

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10
Q

what happens to accumulated air in the fuel tanks?

A

it is collected in the vent tank and vented overboard

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11
Q

where are the fuel drain valves located?

A

on the lower side of each wing

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12
Q

what is provided in the feeder tank for engine fuel supply and jet pump operation?

A

2 electrically driven boost pumps

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13
Q

how is fuel transferred into the feeder tank from the inboard and outboard tank?

A

2 boost pump operated jet pumps located in each tank

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14
Q

if the boost pumps become inoperative during flight, will all the fuel be able to be transferred into the feeder tank by gravity?

A

no

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15
Q

what energises the fuel boost pumps?

A

2 pump switches per engine on the LH overhead switch panel

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16
Q

what powers the fuel boost pumps?

A

28v DC

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17
Q

what protects the fuel pumps?

A
  • LP PUMP LH1/BUS 1 (overhead breaker panel
  • LP PUMP LH2/BUS 2 on ACDC breaker panel
  • LP PUMP RH1/BUS 2 on ACDC breaker panel
  • LP PUMP RH2/BUS 1 on the overhead breaker panel
18
Q

what does the FIRECOCK switch on the LH overhead panel provide for?

A

firewall fuel shutoff in the low pressure fuel system

19
Q

what is the FIRE COCK switch directly connected to?

A

the battery

20
Q

what powers the firecosk switch?

A

28V DC

21
Q

what protects the FIRE COCK switch?

A
  • FIRE COCK LH OPEN/ BUS 1 on the overhead breaker panel
  • FIRE COCK RH OPEN/BUS 2 on the AC/DC breaker panel
  • COCK LH/HOT BUS 1 in the battery compartment
  • COCK RH/HOT BUS 1 in the battery compartment
22
Q

what does the fuel flow indicator show?

A

displays fuel flow to the engines in lb/hr

23
Q

how is fuel flow meaured?

A

mechanically by a turbine and electrically transmitted to the instrument

24
Q

what is the scale on the fuel flow indicator?

A

0-500lb per hour

25
Q

what powers the fuel flow indicator?

A

28v DC

26
Q

what protects the fuel flow indicators?

A
  • FF LH/BUS 1 on the overhead breaker panel

- FF RH/BUS 2 on the AC/DC circuit breaker panel

27
Q

what does the 4 digit FUEL COUNTER do?

A

informs of total fuel used

28
Q

what does it mean for the FUEL COUNTER if the fuel flow indicator is inoperative?

A

it becomes unreliable

29
Q

how does the fuel quantity indicator compensate for fuel density?

A

it is an automatic function of the electronic quantity indicating system

30
Q

what scale does the fuel quantity indicator show?

A

0-24

31
Q

what powers the fuel quantity indicators?

A

28v DC

32
Q

what protects the fuel quantity indicators?

A

F-QTY LH/BUS 1 on the overhead breaker panel

F-QTY RH/BUS 2 on the AC/DC breaker panel

33
Q

what are the 3 positions on the fuel tank quantity selector switch?

A
  • TOTAL (X 100)
  • OUTER (X100)
  • FEEDER (X10)
34
Q

HOW DO WE TAKE A READING USING THE MAGNA-stick fuel level indicator?

A

push up the slotted latch, rotate 90 degrees and allow the calibrated stick to extend until the magnet locks on

35
Q

what is the magna-stick calibrated for?

A

Jet-A1 at 15 degrees

36
Q

what must we do to the boost pumps in the low fuel level system before operating crossed feed?

A

switch them off

37
Q

when must the cross feed section be switched off?

A

for takeoff and landing during normal operation

38
Q

how do we refilll the feeder tank with a low fuel indication during cross feeding?

A

switch on the respective boost pump

39
Q

what powers the crossfeed system?

A

28V DC

40
Q

what controls the cross feed valve?

A

CROSSFEED SWTICH LOCATED ON THE LH overhead switch panel

DO228 type rating (22 decks)

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