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Gulfstream G450 > Powerplant > Flashcards

Powerplant Flashcards

1
Q

During a normal engine start, ignition icons will be seen when the pilot completes what action?

A

Move the fuel control switch to RUN

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2
Q

What should be accomplished if engine vibration levels exceed 0.60HP or 0.60LP?

A

Engine thrust should be reduced, and possibly shut down the engine if other parameters are abnormal.

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3
Q

When will the FADEC automatically accelerate the engine to high idle speed?

A

When flaps are selected to 39
IDLE CONTROL - HIGH IDLE:
- Flaps > 22
- Landing Gear Down
- WoW in the air
- Remains in high idle for 5 sec after landing

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4
Q

What will happen in the unlikely event that a thrust reverser deploys in flight?

A

The FADEC will command idle fuel flow, and the power lever will remain in its last position until moved by the pilot.

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5
Q

What is the procedure for starting an engine with a tailwind in excess of 10 knots?

A

Crank the engine to maximum cranking HP RPM and verify LP RPM rotation before selecting the fuel control switch to RUN.

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6
Q

If TGT exceeds the maximum permissible value during an engine start, what action will be taken by the FADEC?

A

On the ground the start will terminate automatically (provided the start master switch is used), and in flight the start will continue.

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7
Q

Where are the standby engine instruments displayed?

A

On the standby engine instruments page of MCDU1, selected from the MCDU “MENU” page

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8
Q

Which system(s) hydraulically power the left engine thrust reverser?

A

Left hydraulic system only

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9
Q

What is the maximum TGT indication prior to an engine start?

A

Check that the residual TGT is < 200C

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10
Q

How can the residual TGT be reduced prior to engine start?

A

Perform an engine cranking cycle, or allow the engine to crank longer during a normal engine start cycle

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11
Q

What is the minimum bleed air pressure required prior to an engine start?

A

28 psi minimum

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12
Q

Will an engine start if the power lever is not at idle?

A

Yes, and amber “L or R THROTTLE CONFIGURATION” CAS message will illuminate, and the engine will accelerate to the thrust setting selected by the power lever

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13
Q

If peak EVM values exceed the alert level during engine start, what action must be performed?

A

Normally no action is required, this condition is usually normal

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14
Q

What are the indications if the FADEC detects an anomaly during start?

A

The start will be aborted and an amber “AUTOSTART ABORT” CAS will be displayed.

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15
Q

How is the FADEC reset and the “AUTOSTART ABORT” CAS message cancelled?

A

By selecting the START MASTER to OFF, or selecting the L/R FUEL CONTROL to OFF

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16
Q

When should the SVO and IGN indications extinguish after start?

A

Approximately 44% HP RPM

17
Q

When should the engine oil be checked?

A

5-30 minutes after engine shutdown.

18
Q

What are the engine starter duty limits?

A

3 minutes ON, 15 sec OFF for 3 start attempts, then wait 15 minutes before the next start attempt

19
Q

What will cause a blue “START SWITCH CONFIGURATION” CAS message?

A

Depressing both MASTER CRANK and START switches at the same time

20
Q

What will produce an amber “THROTTLE CONFIGURATION” CAS message?

A

Throttles not in the idle position prior to engine start

21
Q

What does it mean if a blue “L or R ALT CTRL” CAS message is illuminated prior to engine start?

A

The engine(s) have switched to ALTERNATE (LP) control mode

22
Q

How is the FADEC system switched back to the normal mode if it has been switched to alternate control?

A

Select the Sensor page on the display controller, then select ENG DATA and deselect L or R ENG ALT CTRL

23
Q

Can the aircraft be dispatched with engine(s) in alternate control?

A

No, a valid EPR signal is required for both engines

24
Q

In a tailwind condition, why is it important to verify positive LP RPM prior to selecting the fuel control switch to RUN?

A

The FADEC can only sense LP RPM and cannot tell the difference between positive or negative LP RPM

25
Q

If after starting both engines, the right pack is OFF and the isolation valve is OPEN, what is the most likely cause?

A

The START MASTER switch is still selected ON

26
Q

What are the correct indications for an engine vibration monitor test (ENG VIB MON)?

A

An amber “ENGINE EXCEEDANCE” CAS and EVM indications between 1.80 and 2.20

27
Q

What is the normal power source for the FADEC and when does it automatically turn on?

A

It has its own dedicated power source (permanent magnetic alternator - PMA) that operates > 35% HP RPM

28
Q

What is the LP RPM that is to be avoided on the ground (keep-out zone)?

A

60-72% LP RPM

29
Q

What are some items that can cause the IGN icons to come on automatically (without continuous ignition switches on)?

A

Normal engine start, excessive rain in-flight, or if the FADEC senses an engine malfunction or failure.

30
Q

When is an engine start FADEC-protected?

A

When using the START MASTER switch, on the ground only

31
Q

On landing, the thrust reversers should be in the idle position by what speed?

A

60 kts

32
Q

What is the maximum crosswind component for engine start?

A

25 kts

33
Q

What is the maximum tailwind component for engine start?

A

25 kts

34
Q

What are the methods of engine air-starts?

A

Windmilling air starts only.

35
Q

What is a limitation concerning static ground run?

A

While the airplane is static on the ground, stabilized engine operation in the band between 60-72% LP RPM (fan speed) is prohibited. Any acceleration through this band must not exceed 10 seconds.

36
Q

How long should the engines be run at idle or taxi power prior to takeoff?

A

5 minutes

Gulfstream G450 (20 decks)

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