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T-6A Systems > SY105 > Flashcards

SY105 Flashcards

1
Q

Engine operating limits: TO/MAX

Torque, ITT, N1, Np, Oil Pressure, Oil Temperature

A

100%; 820; 104 Max; 100 Max; 90 to 120; 10 to 105

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2
Q

Engine operating limits: IDLE

Torque, ITT, N1, Np, Oil Pressure, Oil Temperature

A

3-8%; 750; 60 to 61 (ground), 67 min (flight); 46 to 50 (ground); 90 min; -40 to 105 (ground), 10 to 105 (flight), 106 to 110 (up to 10 minutes)

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3
Q

Engine operating limits: START

Torque, ITT, N1, Np, Oil Pressure, Oil Temperature

A

N/A, 1000 for 5 sec; N/A; N/A; 200 max; -40 min

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4
Q

Engine operating limits: TRANSIENT

Torque, ITT, N1, Np, Oil Pressure, Oil Temperature

A

131 max (20 sec); 870 (20 sec); 104; 102 (20 sec); 40 to 130; 106 to 110 (10 min)

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5
Q

Propeller Interface Unit receives power from

A

PMU

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6
Q

What does the PIU do?

A

regulates oil pressure to pitch change mechansim

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7
Q

What are the indications of a high start?

A

High/rapidly rising ITT and lower N1

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8
Q

What are your primary and secondary indications of a windmilling engine?

A

Primary: N1
Secondary: Oil pressure

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9
Q

When is an airstart warranted?

A

Three conditions: NO FIRE, FOD, or Frozen

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10
Q

What are initial indications of engine failure?

A

Loss of power and airspeed
Rapid decay in N1, torque, and ITT
Propeller movement toward feather due to loss of oil pressure

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11
Q

FEVER check for Fire in Flight

A 
Fluctuating oil pressure, oil temperature, or hydraulic pressure
Excessive turbine temperature
Visual Indications (smoke or flames)
Erratic engine operation
Roughness or Vibration
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12
Q

What is the minimum recommended altitude for airstart procedures?

A

2,000 ft AGL

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13
Q

What are some possible causes of engine failure in-flight?

A

Fuel Starvation
Mechanical Failure
Compressor Stall

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14
Q

What are some possible causes of uncommanded feather?

A

Feather dump solenoid malfunction

Loss of oil pressure to propeller pitch control mechanism

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15
Q

Possible causes of high start

A

PMU failure
FMU failure
Incorrect air/fuel mixture
Low battery

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16
Q

Possible indications of hung start

A

Slow rising ITT
Lower N1
Lower NP

17
Q

Possible causes of hung start

A 
PMU failure 
FMU failure 
Incorrect air/fuel mixture 
Ignition system failure 
Starter failure 
Low battery
18
Q

Possible indications of no start

A

No ITT indication
Lower N1
No NP indication
No torque indication

19
Q

Possible causes of no start

A 
PMU failure 
FMU failure 
Starter failure 
Ignition system failure 
Incorrect air/fuel mixture
20
Q

Initial Indications of Engine Failure

A

Loss of power and airspeed
Rapid decay of N1, torque, and ITT
MASTER WARN lights and tone
Propeller moves toward feather

21
Q

Accompanying Indications of Engine Failure

A

Rapidly decreasing ITT, NP
Lower-than-normal oil pressure
Engine noise
GEN, FUEL PX, OIL PX, OBOGS FAIL annunciators
Possibly PMU FAIL and CKPT ALT annunciators

22
Q

Possible Causes of Engine Failure

A

Fuel Starvation
Mechanical Failure
Compressor Stall

23
Q

Possible Indications of PMU failure

A

Power step change
PMU FAIL and PMU STATUS annunciators
MASTER WARN light
Aural tone

24
Q

Possible Causes of PMU failure

A

System failure System malfunction

25
Q

Possible Indications of Uncommanded Power Changes/Loss of Power

A

Reduction in power/thrust
Lower than expected fuel flow
Uncommanded decrease in N1
High raw ITT (RITT) on AEDD

With oil/engine/fuel system contamination, additionally: Power surges
Uncontrollable high power

26
Q

Possible Causes of Uncommanded Power Changes/Loss of Power

A

Engine rollback due to PMU scheduling Oil/engine/fuel system contamination

27
Q

Possible Indications of Uncommanded Feather

A 
Rapid loss of power 
High torque 
Lower NP 
Possible PMU FAIL/PMU STATUS annunciators 
Engine vibration 
Engine noise
28
Q

Possible Causes of Uncommded Feather

A

Feather dump solenoid malfunction

Loss of oil pressure to propeller pitch control mechanism

29
Q

Possible Indications of Prop Sleeve Touchdown

A 
NP fluctuations 
Increasing torque 
Decreasing thrust 
Engine vibrations 
Possible CHIP detector warning light
30
Q

Possible Causes of Prop Sleeve Touchdown

A

Loss of oil pressure to propeller pitch control mechanism from momentary contact between oil transfer sleeve and propeller shaft

31
Q

Possible Indications of Engine Fire in Flight

A

FIRE annunciator
MASTER WARN light
Aural tone

Fluctuating oil pressure, oil temperature, or hydraulic pressure 
Excessive turbine temperature 
Visual indications (smoke or flames) 
Erratic engine operation 
Roughness or vibration
32
Q

Possible Causes of Engine Fire in Flight

A

Fuel or oil leaks

Fire getting outside the engine

T-6A Systems (5 decks)

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