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Oliver's Q400 > Powerplant > Flashcards

Powerplant Flashcards

1
Q

From where is the Accessory Gearbox drive?

A

Angled Drive shaft from the Outer (HP) Shaft

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2
Q

What services are driven by the Accessory Gearbox?

A

Oil Pressure, scavenge pumps, High Pressure Fuel Pump, DC Starter/Generator, Permanent Magnetic Alternator.

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3
Q

What is the purpose of the Permanent Magnetic Alternator

A

Independent source of electrical power the FADEC, then the PEC

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4
Q

What happens to the display if the ED receives invalid Powerplant data?

A

Dashes

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5
Q

What Power Rating is scheduled when he Condition Levers are set to MIN/850?

A

MCR

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6
Q

What is the purpose of the MCL Key on the Engine Control Panel?

A

Achieves climb power (MCL), but reselects MCR on reaching cruise level.

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7
Q

How many presses of the RDC TOP Selector are required to set a power of 85%?

A

3

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8
Q

What is the maximum Torque that FADEC will schedule if the Power Levers are pushed past the Rating Detent?

A

125%

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9
Q

How can the Power Levers be moved aft of the Flight Idle Position?

A

Triggers underneath the Power Lever Handgrips.

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10
Q

When should Reverse Power be used?

A

Safety/Stopping performance reasons.

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11
Q

Following an Engine Flame-out what would be the first visual indication of a an auto-relight?

A

Increasing ITT (Indicated Turbine Temperature)

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12
Q

Under what conditions would FADEC schedule a Power Uptrim?

A

> 60% power position and low torque (25%) or low PRPM on one engine.

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13
Q

What conditions are required for the Power to be automatically reset from MTOP to MCP following an engine failure on Take-off?

A

AC BLEED selector moved from MIN, provided at least one bleed switch is ON.

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14
Q

At what NH does the Engine Over-speed Protection Circuit activate?

A

over 106%

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15
Q

How is the Engine Over-speed Protection Circuit tested?

A

Its used to shut off fuel on a normal engine shut down.

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16
Q

How is Fuel Heated before reaching the High Pressure Fuel Pump?

A

Pumped through fuel/oil heat exchanger.

17
Q

What are the limits for checking the Engine Oil Level?

A

Within 15-30 minutes of engine shut down.

18
Q

At what pressure should the Engine Oil Warning on the CWP illuminate?

A

44 psi

19
Q

Why is the #2 Engine started first?

A

To pressurise the Emergency brake system.

20
Q

What should make you suspect the one Engine Ignitor was faulty?

A

Every alternate start delayed by 8 seconds

21
Q

What would FADEC’s response be to the failure of an Engine to light up?

A

After firing the second ignitors, it would abort start and shut-off fuel.

22
Q

When would FADEC prevent an Engine Over-temperature during Start-up?

A

10C over 920C

23
Q

How does FADEC identify a Hung start?

A

NH does not reach 50% within 70 seconds.

24
Q

How does FADEC’s management of an Air-start from that of a ground-start?

A

Both ignitors activated, auto abort is inhibited and ITT not actively limited

25
Q

How is the PCU Oil pump powered?

A

Reduction Gearbox

26
Q

How is the Alternate Feather Pump powered?

A

28V DC from the opposite secondary busbar.

27
Q

What does the green light on the Alternate Feather Pump Selector indicate?

A

Pump is running

28
Q

What is the Propellor Blade Angle at which the “Hard” Fine Pitch Stop is set?

A

16 deg

29
Q

What would happen if the Power Lever was inadvertently selected to Disc in flight.

A

Warning Audio sounds

30
Q

When is Propellor Syncrophase not available?

A

Condition Levers set to 1020 RPM (Take-off and landing)

31
Q

What happens if an Autofeather Test is no completed?

A

A/F TEST ABORT appears on ED

32
Q

What conditions are required for Autofeather to ARM?

A

Power Levers above 60 deg PLA, Torque over 50%, Condition Levers at Max 1020.

33
Q

What will activate the Autofeather?

A

Torque of effected engine falls below 25% for at least 3 seconds and PRPM below 80%.

34
Q

What is the function of the AUPC?

A

Protects against failure conditions, driving the propeller to coarse blade angle.

35
Q

When is use of RDC Np not permitted?

A

Cat II approaches and landing on a contaminated runway.

36
Q

What is the minimum Voltage for a Battery Start of the Engine?

A

22v

37
Q

How are Cautionary Messages first displayed on the ED?

A

In amber for 5 secs

38
Q

What does a FADEC CWP Warning indicate?

A

Indicates failure of one FADEC channel.

39
Q

What RPM should the propeller stabilise at following an Overspeed Governor failure?

A

1060 RPM (triggers at 1073 RPM

Oliver's Q400 (24 decks)

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