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650 > Week 3 Part 2 > Flashcards

Week 3 Part 2 Flashcards

1
Q

What engine is used on the G650?

A

BR725

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2
Q

How many compressor stages does the BR725 have?

A

10

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3
Q

How many turbine stages does the BR725 have?

A
  • 2 stage HP

- 3 stage LP

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4
Q

What is P0 air?

A

Ambient from around EEC in the cowling

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5
Q

Hi do you latch and unlatch cowls?

A
  • Latch in to our

- unlatch out to in

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6
Q

Above what wind speed should you not open cowls?

A

13 knots or 15 mph

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7
Q

I’m EEC harnesses, what channel is what colour?

A
  • A - yellow

- B - green

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8
Q

The fuel drains tank can take fuel from how many normal starts, and how many aborted starts?

A
  • 3 normal starts

- 2 aborted

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9
Q

When is rotor bow an issue?

A

20 mins to 5 hours after engine shutdown

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10
Q

What does the EEC do to negate rotor bow if the engine is started 20 mins - 5 hours after it was last operated?

A
  • engine start protect CAS

- engine cranks the engine for longer for cooling prior to ignition

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11
Q

The EEC data entry plug stays with the ________

A

Aircraft

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12
Q

The EEC is powered by the ___ bus until N2 is __% when the PMA takes over

A
  • ESS

- 35%

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13
Q

Standby engine information/control on the MCDU’s gets signal straight from where?

A

Channel A of each EEC

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14
Q

How many N1 speed probes are there per engine?

A
  • 3
  • one for channels A and B
  • one spare as not LRU
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15
Q

Are the N2 probes LRU’s?

A

Yes

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16
Q

If the APU door failed to close, what might be the issue?

A

APU door actuator failed

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17
Q

What must the APU be prior to working on it?

A
  • shut down

- cooled

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18
Q

How many cowl latches need to be closed for an engine run?

A

All 5

19
Q

Engine TGT must be below ___ degrees for a normal start. ___ motor the engine to cool it of over this limit

A
  • 150

- dry

20
Q

What does green IGN mean on engine start page?

A

Ignition system is active

21
Q

When using master crank (alternate engine start), what do we lose?

A

Protections

22
Q

Engine starter limitation is what?

A
  • 3 x 3 minute attempts and then wait 15 mins
23
Q

What component controls the buffer air valves?

A

Mechanical linkage from the VSV actuator, which is controlled by the EHSV in the FMU

24
Q

What component controls VSV position?

A

The VSV actuator, which is controlled by the EHSV in the FMU

25
Q

What do VSV’s prevent?

A

Compressor surge during rapid throttle movements

26
Q

What is soft reversion?

A

N1 control when the EEC loses a parameter to calculate EPR (AMBER CAS)

27
Q

What is hard reversion?

A

N1 control hard selected on the SMC (BLUE CAS)

28
Q

How many engine TGT thermocouples are there?

A

7

29
Q

What are the engine hot red CAS messages? (3)

A
  • Turbine oil fire (550 deg)
  • hydraulic fluid (135 deg)
  • FADEC hot (150 deg)
30
Q

Is EVM part of the FADEC system?

A

No

31
Q

Minimum oil pressure during engine runs is what?

A

25psi

32
Q

Minimum oil temp for engine start is what?

A

-40 deg

33
Q

Once you’ve operated the piggy back levers for TR deployment, how long do you have to operate the maintenance test enable switch?

A

30 seconds

34
Q

On the TR lockout bolts, what must you inspect

A

Bolt o rings

35
Q

Engine oils can be serviced when?

A

5 mins to 24 hours after runs

36
Q

Engine oil filter bypasses at __psid and indicates impending bypass at __psid

A
  • 50

- 28

37
Q

In alternate mode, the engine EEC does not limit ___ on ground

A

TGT

38
Q

When installing a new igniter and you’ve lost the old washer, what must you carry out?

A

Immersion depth

39
Q

When do you get an oil filter CAS message?

A

Impending bypass (28psi)

40
Q

What bus to the igniters use?

A
  • Essential DC
  • 28V DC in
  • 3000V out
41
Q

What do the buffer air valves do?

A
  • Allow HP4 air to the bearings

- controlled via VSV actuator

42
Q

What ports fuel from the FMU to VSV actuator?

A

EHSV in the FMU

43
Q

How do you reset the oil filter DPI?

A

Remove filter and filter cover and turn upside down

44
Q

With the starter air valve replacement, what do you need to ensure?

A

V band clamps 90 degrees offset

650 (9 decks)

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