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U-28 > Engine System (CSG) > Flashcards

Engine System (CSG) Flashcards

1
Q

What does “Free Turbine” mean?

A

AOH Vol 2, Engine

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2
Q

The PT6A-67B is flat rated to 1,200 SHP at takeoff power. What does “flat rated” mean?

A
  1. Max SHP/Engine limits reduced to prevent structural damage, extend engine life, and permit max takeoff power over wide range of ambient conditions.

Pratt and Whitney “Know your PT-6A
Turboprop” Handbook

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3
Q

All PT6A engine applications use ________________ as the primary power
setting parameter.

A

Torque

Pratt and Whitney “Know your PT-6A
Turboprop” Handbook

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4
Q

The PT6A-67B combustion section uses _______ duplex fuel nozzles and ____
spark ignitors.

A

14, 2

AOH Vol 2, Engine

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5
Q

What components are installed in the accessory gearbox?

A

Starter/Generator, FCU, High/Low press fuel pumps, fuel/oil heat exchanger, Oil scavenge and pressure pumps

AOH Vol 2, Engine

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6
Q

The engine uses approximately 25% of bleed air for combustion. Name at least five other uses for bleed air.

A

ECS, Pressurization, De-ice boots, FCU, Cooling, Bleed Valve,
Sealing bearing compartment

AOH Vol 2, Engine, ECS, Ice
Protection

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7
Q

What does the compressor bleed valve do?

A

Prevents compressor stalls during engine acceleration from low engine speeds.

Pratt and Whitney “Know your PT6A
Turboprop” Handbook

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8
Q

What does the reduction gearbox do?

A

Reduces turbine speed from ~30,000 RPM to prop shaft speed of
1700 RPM (or less) through two stages of gear reduction

AOH Vol 2, Engine and Pilatus
Engineering Notes

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9
Q

What does the torque limiter do?

A

Bleeds Py air from FCU to reduce engine speed and keep engine torque below 44.3 psi

AOH Vol 2, Engine

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10
Q

(T/F) the EIS must be operational for all flights.

A

True

AOH Vol 1, EIS Failure checklist

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11
Q

What does the MENU button do on the EIS?

A

Alternate display of Torque and ITT in Endurance and OAT
windows

AOH Vol 2, EIS

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12
Q

(T/F) The EIS automatically records ops limit exceedance.

A

True

AOH Vol 2, EIS

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13
Q
  1. Ops limits
    a. Max Continuous Torque _______
    b. Max Continuous ITT_______
    c. Max Starting ITT and duration _______ _______
    d. Max Ng _______
    e. Max Continuous Prop RPM _
    f. Prohibited RPM range on ground _____________
    g. Normal Oil Pressure_
    h. Low Oil Press Caution Range (Amber) _______
    i. Low Oil Press Warning (Red) _______
    j. Max Continuous Oil Temp Range ___________
    k. Oil Temp Warning ___________
A

a. 36.9 psi,
b. 760°C,
c. 1000°C/5 sec,
d. 104%,
e. 1700 (+/-30) RPM,
f. 350-950 RPM,
g. 90-135 psi,
h. 40-60/60-90 psi,
i. <40 psi (40-90 psi after 20 sec delay),
j. 10-105°C,
k. >110°C

AOH Vol 1, Chapter 5

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14
Q
  1. Ops limits
    a. Max Continuous Torque _______
A

a. 36.9 psi,

AOH Vol 1, Chapter 5

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15
Q
  1. Ops limits
    b. Max Continuous ITT_______
A

b. 760°C,

AOH Vol 1, Chapter 5

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16
Q
  1. Ops limits
    c. Max Starting ITT and duration _______ _______
A

c. 1000°C/5 sec,

AOH Vol 1, Chapter 5

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17
Q
  1. Ops limits
    d. Max Ng _______
A

d. 104%,

AOH Vol 1, Chapter 5

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18
Q
  1. Ops limits
    e. Max Continuous Prop RPM _
A

e. 1700 (+/-30) RPM,

AOH Vol 1, Chapter 5

19
Q
  1. Ops limits
    f. Prohibited RPM range on ground _____________
A

f. 350-950 RPM,

AOH Vol 1, Chapter 5

20
Q
  1. Ops limits
    g. Normal Oil Pressure___
A

g. 90-135 psi

AOH Vol 1, Chapter 5

21
Q
  1. Ops limits
    h. Low Oil Press Caution Range (Amber) _______
A

h. 40-60 psi
or
If Ng above 72%, 60-90 psi after a 5 sec. delay

AOH Vol 1, Chapter 5

22
Q
  1. Ops limits
    i. Low Oil Press Warning (Red) _______
A

i. <40 psi (40-90 psi after 20 sec delay)

AOH Vol 1, Chapter 5

23
Q
  1. Ops limits
    j. Max Continuous Oil Temp Range ___________
A

j. 10-105°C,

AOH Vol 1, Chapter 5

24
Q
  1. Ops limits
    k. Oil Temp Warning ___________
A

k. >110°C

AOH Vol 1, Chapter 5

25
Q

When is the MOR lever used?

A

Pneumatic failure at FCU or PCL system failure

AOH Vol 2, Engine

26
Q

During MOR lever operations, maintain Ng normally above ______ and do not let Ng fall below ______.

A

80%, 65%

AOH Vol 1, Chapter 3

27
Q

How much could total landing distance increase when using the MOR lever?

A

By a factor of two (2)

AOH Vol 1, Chapter 3

28
Q

What does the P3 Accumulator do?

A

Stores bleed air used to purge fuel nozzles during engine
shutdown

AOH Vol 2, Engine

29
Q

What battery voltage is required for engine start?

A

24 Volts

AOH Vol 1, Normal Procedures

30
Q

If the oil temperature is < +5° C, place condition lever to ____________ for engine start.

A

Flight Idle

AOH Vol 1, Normal Procedures

31
Q

When is the STARTER INTERRUPT button used?

A

Interrupt start by deactivating starter relay during a starting malfunction

AOH Vol 2, Engine

32
Q

What are the starter cycle limits?

A

Sequence, 60 sec OFF, Sequence, 60 sec OFF, Sequence, 30 min OFF

AOH Vol 1, Chapter 5

33
Q

What is a hung start?

A

ITT rise, but Ng does not increase to idle speed

AOH Vol 1, Chapter 3

34
Q

When is the DRY MOTORING RUN checklist used?

A

To remove internally trapped fuel and vapor or if there is evidence of a fire within the engine gas path

AOH Vol 1, Chapter 3

35
Q

What should you do if there is no indication of increase in Ng or ITT within 10 sec of placing the condition lever to GROUND IDLE?

A

NO START:
Condition Lever…CUT-OFF/FEATHER,
Starter…Interrupt

AOH Vol 1, Chapter 3

36
Q

What is done with the starter during a HOT START?

A

Continue ON for 20 seconds

AOH Vol 1, Chapter 3

37
Q

For off-station operations, check the oil quantity using the sight gauge within ______ to ______ minutes after engine shutdown.

A

10, 20

AOH Vol 1, Normal Procedures

38
Q

What quantity of oil is maintained in the engine oil system?

A

14.5 quarts

AOH Vol 2, Engine

39
Q

When does the red OIL QTY warning illuminate on the CAWS panel and what does it mean?

A

Only on ground before start or after engine shutdown; Oil quantity indicates low

AOH Vol 1, Chapter 3

40
Q

What is the first step in the emergency checklist for OIL TEMPERATURE caution or warning?

A

PCL…Reduce Power

AOH Vol 1, Chapter 3

41
Q

For an OIL PRESSURE CAUTION, reduce torque below _______ PSI.

A

24

AOH Vol 1, Chapter 3

42
Q

What is the procedure for an OIL CHIP CAWS in flight?

A

Check engine parameters, reduce power to minimum required for safe flight, land as soon as possible

AOH Vol 1, Chapter 3, Oil
Contamination

43
Q

(T/F) Flight with a CAWS FIRE DETECT is OK as long as the ENG FIRE warning test is good.

A

False

AOH Vol 1, Chapter 3

44
Q

Following an engine failure in flight, when would you not attempt an air start?

A

If engine failure is due to Fire, FOD, Seizure, or no fuel remains

AOH Vol 1, Chapter 3, Warning

U-28 (19 decks)

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