Powerplant

Question 1

Engine idle time before ENG RUN to off?

Answer 1

3 mins

Question 2

Max takeoff ITT and time limit?

Answer 2

900ºC for 5 mins (10 mins single engine)

Question 3

Capacity of oil replenishment tank?

Answer 3

6 quarts

Question 4

Which aircraft systems use bleed air?

Answer 4

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

Question 5

Rolls Royce designation for Global high bypass turbofan engine?

Answer 5

BR710 A2-20

Question 6

What engine oil pressure indication requires an engine shutdown?

Answer 6

25PSI

Question 7

Min oil temp for start?

Answer 7

-40ºC

Question 8

Temperature for cranking after failed engine start attempt?

Answer 8

150ºC or starter limit

Question 9

Selecting ENG RUN to off closes which fuel shutoff valve?

Answer 9

High pressure shutoff valve within the fuel metering unit

Question 10

What compressor stages supply bleed air?

Answer 10

5th and 8th stage

Question 11

Air pressure requirement for external air start unit?

Answer 11

40 PSI

Question 12

Min oil temp before accelerating above idle?

Answer 12

+20ºC

Question 13

How is the engine oil cooled?

Answer 13

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

Question 14

Max N2 RPM for engine started engagement?

Answer 14

N2 less than 42%

Question 15

When is the use of the oil replenishment system prohibited?

Answer 15

OAT at or below -12ºC

Question 16

Max tailwind for engine start?

Answer 16

20 knots

Question 17

Max engine relight altitude?

Answer 17

30,000 feet

Question 18

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

Answer 18

Between 20mins and 5 hours of previous shutdown

Question 19

How are the thrust reversers controlled and powered?

Answer 19

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

Question 20

Time limitation for accurately checking engine oil quantity?

Answer 20

Between 5 to 30 mins after shutdown

Question 21

Starter cranking limits?

Answer 21

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

Question 22

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

Answer 22

Full before flight (10.62 quarts)

Question 23

When is high idle commanded by the EEC?

Answer 23

When the aircraft is in the approach configuration

Question 24

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

Answer 24

By a dedicated generator on the accessory gearbox

Question 25

Max oil temp?

Answer 25

+160ºC

Question 26

How is the ITT measured?

Answer 26

Seven dual element thermocouples located in the LP turbine entry area

Question 27

How is the engine pressure ratio calculated?

Answer 27

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

Question 28

Max engine oil quantity?

Answer 28

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

Question 29

Max oil consumption for engine?

Answer 29

.21 US quarts/hour

Question 30

How is the engine protected from overspeed?

Answer 30

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

Question 31

Where are the N1 and N2 RPM speed sensors located?

Answer 31

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

Question 32

How is thrust management controlled throughout all phases of flight?

Answer 32

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

Question 33

What are the two autostart air envelopes and airspeeds?

Answer 33

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

Question 34

Which events would cause FADEC auto shutdown on ground?

Answer 34

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

Question 35

Thrust REV limitations?

Answer 35

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

Question 36

Minimum N2 idle limit?

Answer 36

58%

Question 37

Engine thrust rating?

Answer 37

14750lb at sea level ISA +20ºC

Question 38

Max ITT for ground/air start?

Answer 38

700ºC (ground), 850ºC (air)