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😵‍💫 > POWERPLANT - ENGINE MAINTENANCE AND TROUBLESHOOTING > Flashcards

POWERPLANT - ENGINE MAINTENANCE AND TROUBLESHOOTING Flashcards

(80 cards)

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1
Q

What is ‘detonation’ in an aircraft engine?

A

Sudden explosion of the fuel-air mixture

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2
Q

Which of the following can cause detonation in a piston engine?

A

Low fuel octane rating

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3
Q

What is the recommended procedure if water is detected in the aircraft fuel system?

A

Drain the system and replace the fuel

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4
Q

How is an aircraft engine typically started?

A

Using a starter motor

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5
Q

What is a typical symptom of carburetor icing?

A

Decrease in engine RPM

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6
Q

What does the term ‘leaning the mixture’ mean?

A

Decreasing the fuel-to-air ratio

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7
Q

What is ‘pre-ignition’ in a piston engine?

A

Early ignition of the fuel-air mixture

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8
Q

What is a typical symptom of a failing magneto in an aircraft engine?

A

Engine misfiring or rough running

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9
Q

What does the term ‘rich mixture’ mean in aircraft engines?

A

High fuel-to-air ratio

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10
Q

What does the term ‘hot start’ refer to in a jet engine?

A

Excessive EGT during startup

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11
Q

In turbine engine maintenance, what is the purpose of a hot section inspection?

A

To inspect and maintain the combustion and turbine sections

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12
Q

What is the most common cause of oil foaming in an aircraft engine?

A

Air leakage into the oil system

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13
Q

Which of the following is a symptom of a partially clogged fuel injector in a reciprocating engine?

A

Rough idle

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14
Q

Which of the following conditions is most likely to cause engine surging in a turbine engine?

A

Inlet distortion

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15
Q

When adjusting the idle speed of a reciprocating engine, the mixture control should be set to:

A

Full Rich

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16
Q

What is the indication of a failed engine bearing?

A

Metallic noise

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17
Q

What is the primary purpose of the dynamic propeller balancing often performed on Lycoming engines?

A

To reduce engine vibration

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18
Q

FAA regulations require which action if a Continental engine’s oil consumption significantly increases?

A

Conduct a thorough inspection to determine the cause

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19
Q

What is the recommended oil type for most Continental engines according to manufacturer specifications?

A

Ashless dispersant oil

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20
Q

During a pre-flight inspection, what should be checked in the fuel system of a Lycoming engine?

A

Fuel quantity and signs of contamination

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21
Q

What common maintenance action is recommended for Continental engines equipped with turbochargers?

A

Periodic cleaning of the wastegate and turbocharger components

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22
Q

For Continental engines, what is the typical cause of an engine not reaching full RPM during takeoff?

A

Incorrect magneto timing

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23
Q

Which of the following is a common indication of a magneto problem in a Continental engine?

A

Engine backfiring

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24
Q

What is the recommended procedure for troubleshooting a rough running Lycoming engine?

A

Check and clean spark plugs

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25
Which component is crucial for ensuring proper oil pressure in a Continental engine?
Oil pump
26
According to FAA, what should be done if a Lycoming engine experiences a propeller strike?
Perform a complete engine teardown inspection
27
What does a significant decrease in manifold pressure indicate in a turbocharged engine?
Turbocharger failure
28
When should engine oil be changed in a reciprocating engine?
a. Every 100 flight hours or as recommended by the manufacturer
29
What could be a result of fuel vapor lock in an aircraft engine?
Engine stalling or failure
30
What could be a consequence of using the wrong grade of oil in an aircraft engine?
Engine overheating or excessive wear
31
Which of the following indicates the need for an immediate oil change in a turbine engine?
Presence of metal particles in the oil filter
32
What is the main reason for regularly draining fuel sumps and filters in aircraft?
To remove water and contaminants
33
What action should be taken if a fuel sample shows contamination?
Report and document the contamination
34
Which of the following is a common symptom of fuel contamination in a reciprocating engine?
Rough running engine
35
Which component is checked during a magneto-to-engine timing procedure?
Crankshaft position
36
According to regulations, what is required after replacing a propeller governor on a reciprocating engine?
Ground run-up test
37
Regulations stipulate that an engine test cell must be used for:
Initial run-in of a new or overhauled engine
38
What does a drop in RPM during a magneto check indicate?
Faulty magneto or ignition system issue
39
According to FAA, when must an engine be borescoped?
As specified by the manufacturer
40
What is the typical cause of high oil pressure in an aircraft engine?
Low oil temperature
41
When troubleshooting a low fuel flow indication in a turbine engine, what is the first component to check?
Fuel pump
42
What causes 'carburetor icing' in a reciprocating engine?
The rapid cooling of air as it passes through the carburetor
43
What type of damage is most likely to be found in the compressor section of a jet engine?
Foreign object damage (FOD)
44
What does the 'rich' position on a mixture control indicate?
Maximum fuel-to-air ratio
45
What action should be taken if an engine oil sample shows excessive metal particles?
Conduct an immediate engine teardown inspection
46
Which of the following is an indication of a successful engine run-up test?
Stable RPM within limits
47
During an engine inspection, what tool is commonly used to measure cylinder head temperatures?
Pyrometer
48
What is the typical cause of a rough-running engine during idle in a reciprocating engine?
Incorrect idle mixture setting
49
According to FAA regulations, when must an aircraft engine be removed for a major overhaul?
After a propeller strike
50
How often should the magneto timing be checked in a reciprocating engine?
Every 50 flight hours
51
What is the purpose of a 'dump valve' in a fuel system?
To empty the fuel lines after shutdown
52
What is the purpose of 'dynamic balancing' of a turbine rotor?
To minimize vibration
53
What is the function of a 'fire loop' in an aircraft engine?
To detect over-temperature conditions
54
What is the primary function of a 'check valve' in a lubrication system?
To allow oil flow in only one direction
55
What does 'specific fuel consumption' measure in an aircraft engine?
Fuel efficiency
56
What does the 'lean' position on a mixture control indicate?
Minimum fuel-to-air ratio
57
What is 'blade creep' in a turbine engine?
The gradual elongation of turbine blades due to high temperatures and centrifugal forces.
58
What is the primary purpose of an engine performance run after maintenance?
To verify that the engine operates within performance limits
59
According to the FAA, how often should a turbine engine undergo a borescope inspection?
As specified in the engine's maintenance manual
60
What is a common cause of high Exhaust Gas Temperature (EGT) in a turbine engine?
Excessive fuel flow
61
Engine components suspected of exceeding limits should be:
Tagged and sent for detailed inspection
62
What is the primary indication of a failing fuel pump in a reciprocating engine?
Low fuel pressure
63
When performing a compression test on an aircraft engine, what is the acceptable minimum pressure difference between cylinders?
25 PSI
64
What is the purpose of a magneto timing check on a reciprocating engine?
To ensure proper ignition timing
65
Which of the following is a sign of a turbocharger failure in a piston engine?
Decreased manifold pressure
66
When troubleshooting a low oil pressure issue in a turbine engine, the first step should be:
Check the oil quantity
67
In a dual magneto system, if one magneto fails during flight, the engine will:
Run at reduced power
68
What is the likely cause of fluctuating RPM in a piston engine?
Fuel contamination
69
When should a turbine engine's fuel nozzles be cleaned?
When engine performance degrades
70
What is the primary purpose of a trend monitoring program for turbine engines?
To detect early signs of engine degradation
71
Regulatory bodies mandates that engine mounts must be inspected for:
Cracks and corrosion
72
What must be done if an engine exceeds its maximum allowable temperature during operation?
Perform an immediate inspection for damage
73
What could be a possible cause of high oil consumption in a reciprocating engine?
Worn piston rings
74
In a piston engine, what does a spark plug fouling usually indicate?
Rich mixture
75
Regulations state that an engine overhaul must include:
Inspection and testing of critical components
76
Which type of maintenance task is considered a major repair under FAA regulations?
Replacing an engine mount
77
What type of inspection is typically performed after an aircraft engine overhaul?
Post-overhaul inspection
78
What is 'blade tracking' in relation to propellers?
Ensuring each blade follows the same path
79
What is a counterweight propeller?
A propeller with adjustable counterweights for pitch control
80
What is the effect of a propeller slipstream on aircraft performance?
Increases airflow over the wings

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