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Global 6000 > Powerplant > Flashcards

Powerplant Flashcards

1
Q

Engine idle time before ENG RUN to off?

A

3 mins

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2
Q

Max takeoff ITT and time limit?

A

900ºC for 5 mins (10 mins single engine)

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3
Q

Capacity of oil replenishment tank?

A

6 quarts

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4
Q

Which aircraft systems use bleed air?

A

Air conditioning; pressurisation; cowl and wing anti ice; engine starting

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5
Q

Rolls Royce designation for Global high bypass turbofan engine?

A

BR710 A2-20

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6
Q

What engine oil pressure indication requires an engine shutdown?

A

25PSI

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7
Q

Min oil temp for start?

A

-40ºC

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8
Q

Temperature for cranking after failed engine start attempt?

A

150ºC or starter limit

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9
Q

Selecting ENG RUN to off closes which fuel shutoff valve?

A

High pressure shutoff valve within the fuel metering unit

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10
Q

What compressor stages supply bleed air?

A

5th and 8th stage

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11
Q

Air pressure requirement for external air start unit?

A

40 PSI

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12
Q

Min oil temp before accelerating above idle?

A

+20ºC

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13
Q

How is the engine oil cooled?

A

Fuel cooled oil cooler (also used to warm low temp fuel prior to the FMU)

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14
Q

Max N2 RPM for engine started engagement?

A

N2 less than 42%

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15
Q

When is the use of the oil replenishment system prohibited?

A

OAT at or below -12ºC

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16
Q

Max tailwind for engine start?

A

20 knots

17
Q

Max engine relight altitude?

A

30,000 feet

18
Q

When should “rotor bow” dry cranking be expected during auto starts?

A

Between 20mins and 5 hours of previous shutdown

19
Q

How are the thrust reversers controlled and powered?

A

Controlled by the EEC and powered be the respective engine HYD sys 1 or 2

20
Q

Time limitation for accurately checking engine oil quantity?

A

Between 5 to 30 mins after shutdown

21
Q

Starter cranking limits?

A

3mins on, 15secs off, 3 mins on, 15secs off, 3 mins on 15mins off

22
Q

Minimum oil quantity for aircraft operation in excess of 3 hours?

A

Full before flight (10.62 quarts)

23
Q

When is high idle commanded by the EEC?

A

When the aircraft is in the approach configuration

24
Q

What is the backup power source for the FADEC when the 28VDC (Batt Bus) is not available?

A

By a dedicated generator on the accessory gearbox

25
Q

Max oil temp?

A

+160ºC

26
Q

How is the ITT measured?

A

Seven dual element thermocouples located in the LP turbine entry area

27
Q

How is the engine pressure ratio calculated?

A

Ratio of engine inlet total pressure (TAT probe) and engine exhaust total pressure

28
Q

Max engine oil quantity?

A

12.8 US quarts (typically fill to 11.0 US quarts via oil replenishment system)

29
Q

Max oil consumption for engine?

A

.21 US quarts/hour

30
Q

How is the engine protected from overspeed?

A

When EEC recognises N1 or N2 overspeed, it closes the fuel high pressure SOV

31
Q

Where are the N1 and N2 RPM speed sensors located?

A

N1: Near the LP compressor shaft; N2: front of the accessory gearbox

32
Q

How is thrust management controlled throughout all phases of flight?

A

FADEC, note: an EEC is a major component of the FADEC

33
Q

What are the two autostart air envelopes and airspeeds?

A

ATS envelope (≤249knots) Windmill envelope(≥250knots)

34
Q

Which events would cause FADEC auto shutdown on ground?

A

N2≤15%(120secs). Idle not achieved by 120secs. Starter cutout not reached within starter duty timer(3min) ITT exceeds start limit (700ºC)

35
Q

Thrust REV limitations?

A

Prohibited in flight, touch and go landings and to back up aircraft.

36
Q

Minimum N2 idle limit?

A

58%

37
Q

Engine thrust rating?

A

14750lb at sea level ISA +20ºC

38
Q

Max ITT for ground/air start?

A

700ºC (ground), 850ºC (air)

Global 6000 (18 decks)

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