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From Flashcardlet > Engines > Flashcards

Engines Flashcards

0
Q

Reduction gear box has what on it?

A
  1. Prop over speed governor
  2. PCU
  3. ACW gen
  4. HP Feather pump
  5. Prop brake
  6. Aux feather pump (electric)
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1
Q

Accessory gear box has what on it?

A

DC starter gen
High press fuel pump
2 oil pumps

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2
Q

What does ECU stand for?

A

Electronic
Control
Unit

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3
Q

What does FDAU look at to determine where to put the amber bug on the TQ gauges?

A
  1. SCU (measures the TQ)
  2. PWR MGT selection
  3. Ambient conditions
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4
Q

What do the FDAUbugs represent?

A

Max TQ for selected mode of flight

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5
Q

Describe the TO selection on PWR MGT

A

For TO LDG

Only 5 minutes

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6
Q

How does the SYNPHER work?

A

Syncs L prop to R prop
Syncs RMP and sound
OFF for single engine

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7
Q

Pushing START push button does what?

A
  1. Starts HP pump
  2. Puts GCU in start mode
  3. Arms the exciters
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8
Q

What does the ECU do?

A

Maintains constant power output for a given PL position by adding fuel to what the HMU has scheduled

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9
Q

Does HMU or ECU provide uptrim?

A

ECU

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10
Q

What NH does ECU keep engine at no matter what…

A

71% to keep ACW gen online

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11
Q

What is the ECU fail fix?

A

If ECU faults on TO it keeps your FF at current so you won’t get a huge power loss simulating a failed engine

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12
Q

What conditions must be met to set prop brake?

A
  1. Gust lock engaged
  2. Blue system pressure
  3. On the ground
  4. CL feather or fuel S/O
  5. Switch on
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13
Q

What does ATPCS stand for?

A 
Automatic
Take off
Power
Control
System
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14
Q

How do you arm ATPCS?

A
  1. PB in
  2. PL above 56 deg
  3. TQ above 53 deg
  4. PWR MGT in TO
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15
Q

How is ATPCS triggered?

A

TQ below 21%

16
Q

How long is the delay for ATPCS to activate if engine fails on TO?

A

2.15 sec

17
Q

If SCU (signal Conditioning Unit) fails on TO will ATPCS activate?

A

Yes

18
Q

Will you have DEICING if bleed valve closes?

A

Yes

19
Q

When will a bleed valve close?

A
  1. Duct over heat
  2. Duct leak
  3. Fire handle
  4. If prop brake on, #1 bleed valve closes
  5. No electrical pwr
20
Q

The 2 purposes of the pack valve PB?

A
  1. Open or close pack valve

2. Pressure control

21
Q

4 things the plane senses to adjust cabin temp?

A
  1. Duct temp
  2. Compartment temp
  3. Skin temp
  4. Selector knob position
22
Q

When does hot bypass valve open?

A

On descent. Hot bleed air is allowed directly into the cabin to pressurize the vessel.

23
Q

When starting, how long is low oil pressure suppressed for?

A

30 sec

24
Q

3 prop overspeed protections

A
  1. Overspeed gov
  2. Pitch lock ( acme screw)
  3. PCU can fix it to some extent on its own
25
Q

When does ECU fault light go out?

A

25% NH

26
Q

How long does the exhaust mode PB FAULT last for?

A

2 mins

27
Q

The HMU does what?

A

Delivers fuel back to the tank to open motive flow valve

Meters fuel

28
Q

ECU does what?

A

Adds to HMU fuel scheduling

29
Q

SCU does what?

A

Senses TQ in engine
Displays it on needle
Senses <21% TQ and signals ATPCS

30
Q

How do you get a READY light to set prop brake?

A

On ground
CL in FTHR or FUEL SO
Hyd pressure
Gust lock engaged

31
Q

When PCU malfunctions, what does the plane do to protect its self from over speed?

A

Opens feather valve to let oil out of the hub to help drive the prop back towards feather and give you time to figure it out

32
Q

When are the three times you look for LOW PITCH

A

Coming out of feather
Rejected TO (before using reverse)
During a normal landing

33
Q

What is the difference between ATPCS armed on the ground vs in flight?

A

No uptrim if armed in flight

34
Q

What prevents xstart in flight?

A

WOW sensor

35
Q

Why do we wait 30 sec after feather to shut down the engine?

A

To allow the aux oil tank to fill up

36
Q

Pulling the fire T handle does what?

A 
LP fuel valve closes
Bleed valve + HP valve close
De ice and isolation valve closes
DC and ACW gens off
Feathers prop
Arms squibs (SQUIB illuminates)
37
Q

When can you bring Np to 77% in climb?

A

When TQ reaches 75%

38
Q

When can you bring Np to 77% in climb?

A

When TQ reaches 75%

From Flashcardlet (14 decks)

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