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Embraer E170/190 > FUEL SYSTEM > Flashcards

FUEL SYSTEM Flashcards

1
Q

Parts of fuel system

A

1) Storage

2) Distribution

3) Fuel Indication

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2
Q

Wing tanks

A

2 x INTEGRAL (9496 (4748 per tank))
2 x SURGE
1 x COLLECTOR

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3
Q

How are engines supplied?

A

From integral tanks through collector tanks

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4
Q

Which tank is used by APU?

A

Right tank

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5
Q

How are engines fed?

A

By the means of EJECTIVE PUMP

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6
Q

How is APU fed?

A

By the means of ELECTRICAL PUMPS (AC/DC) when engines are not running

By EJECTORS when engines are running

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7
Q

Role of AC pumps

A

1) Redundancy for case of EJECTOR PUMP failure

2) Fuel pressure for engine&APU start on the ground

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8
Q

2 types of refueling

A

1) via refueling adapter (RHW) only pressure refueling

2) 2x gravity refuel ports on the top of the wing

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9
Q

How does the fuel flow inside the tanks?

A

Toward the fuselage into collector tank

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10
Q

Baffle and flapper check valves

A

Baffle and flapper check valves
1) prevent fuel from escaping of collector tank
2) prevent fuel from entering the surge tank

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11
Q

Purpose of tank vent system

A

To keep differential pressure between tank and ambient air within operational limits

To prevent fuel spillage during maneuvers and hard breaking

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12
Q

How is fuel drain provided?

A

Each tank has its own independent line into a surge tank

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13
Q

Where is water drain valves are located?

A

1) Next to AC auxiliary fuel pump (on the bottom of collector tank)

2) Close to the wing stub to wing junction

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14
Q

Fuel quantity measurement system consists of

A

1) 13 x ELECTRICAL FUEL QUALITY (PROBES)

2) 3 x MECHANICAL FUEL QUANTITY (MAGNETIC LEVEL INDICATOR)

3) Fuel temperature

4) Low level indication (independent probe (not one of the fuel indication probe)

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15
Q

Type of fuel measurement probes

A

AC capacitance-type

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16
Q

Which system of measurement is backup

A

Mechanical (floater)

17
Q

When fuel temperature is indicated in amber

A

Below -37

18
Q

How pump failure is indicated

A

By amber dashes

19
Q

Where is temperature sensor installed?

A

In the left tank only

20
Q

When LOW LEVEL warning is indicated?

A

If fuel quantity is below 300 kg

21
Q

Where are magnetic sensors are mounted

A

3 indicators per wing mounted into fuel tank access panels

22
Q

How to measure fuel quantity with a mechanical indicator

A

Turn it out, pull, take the value from the scale and determine the quantity with the chart from operation manual

23
Q

Parts of fuel distribution system

A

1) Engine feed

2) APU feed

3) Refuel defuel

24
Q

Means of fuel supply to the engines

A

1) Ejectors

2) AC pumps

25
Q

Crossfeed function

A

Allows fuel supply to both engines from either of fuel tanks

26
Q

Source of fuel supply to APU

A

Right tank by DC pump

27
Q

Which pump is used for fuel supply to start the engine on the ground (in flight)

A

DC pump is used for engine start when AC power or AC fuel pump is unavailable

28
Q

Mean of initial fuel supply during start

A

When APU is working — AC pump

After start — ejector

29
Q

Low fuel pressure in engine detected

A

Ejector — OFF

AC PUMP (if in AUTO) — automatically starting

30
Q

Mean of initial fuel supply: NO AC GPU, NO APU

A

DC pump

31
Q

EICAS: FUEL IMBALANCE

A

360 kg

Disappear — 45 kg “FUEL EQUAL — XFEED OPEN”

32
Q

Priority of AC PUMP selector

A

AC PUMP selector command overrides XFEED selector command

33
Q

XFEED operation limitations

A

Prohibit during takeoff and landing

34
Q

APU fuel supply

A

1) Initial supply — DC PUMP

2) AC power available — AC PUMP

3) Engine is running — EJECTOR

35
Q

How to provide APU fuel supply from the left tank?

A

Set LOW 2

36
Q

When there may appear FUEL LO LEVEL indication, if fuel quantity is adequate?

A

In case of scavenge pumps failure, fuel flows out from the collector tank and Fuel Low Level sensor triggers

Embraer E170/190 (9 decks)

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