P Flashcards
In what position should the crankshaft be when a magneto is being timed to the engine?
The piston in cylinder number 1 should be in the correct position for ignition to occur. This is normally about 30° before top center on the compression stroke.
What is checked on engine runup to determine the operational condition of the engine?
Idling RPM and manifold pressure, engine acceleration, maximum static RPM and manifold pressure, magneto drop, ignition switch safety check, propeller pitch change, propeller feathering, oil pressure, fuel pressure, and fuel flow.
What are two main causes of a cylinder having low compression?
Piston rings not seating or broken, and valves not seating or burned.
What is a low-tension ignition system?
A low-tension ignition system is a type of ignition system that operates at a lower voltage than conventional systems.
What are some advantages of a horizontally opposed engine?
Low power-to-weight ratio, ideal for installation on aircraft wings, and low vibration characteristics.
How are the four strokes of a reciprocating engine similar to the sections of a turbine engine?
Intake = air inlet section, compression = compressor section, ignition and power = combustion and turbine sections, exhaust = exhaust section.
What type of turbojet engine is commonly used in commercial aviation due to lower noise and better fuel consumption?
High-bypass turbofan engines.
What adjustments and rigging are accomplished on a turbine engine?
Adjustment of power control levers/ rigging of cables.
Adjustment of Fuel control unit
What checks of a turbine engine are necessary to verify preflight condition?
a. Inspect the cowling and all air inlet areas and attachment of the engine to the airframe.
b. Inspect the inlet guide vanes and the first stage of the compressor or fan blades.
c. Check for unusual noise when the compressor is rotated.
d. Inspect the rear turbine and exhaust system.
e. Check the quantity of the lubricating oil for the engine and the constant-speed drive.
f. Check the ignition system for operation by listening for the sparks.
What is a manufacturer’s mandatory service bulletin?
A manufacturer’s mandatory service bulletin is a document that outlines required actions to ensure safety and compliance with regulations.
What is meant by on-condition maintenance of a turbine engine?
The monitoring of the engine performance at regular intervals and determining when maintenance is required based on certain operating parameters specified by the engine Manufacturer.
Is a manufacturer’s mandatory service bulletin required to be complied with?
No, but it is recommended.
Which of the following are FAA-approved data: service letters, service bulletins, instructions for continued airworthiness, ADs, or TCDSs?
ADs and TCDSs are approved by the FAA.
When must ADs be complied with?
All ADs that apply to the affected product must be complied with in accordance with the instructions of the AD and in the timeframe specified by the AD.
What is used to fill the line between a fuel pressure gauge and the fuel metering system?
A light oil such as kerosine.
What could cause a fuel pressure gauge to fluctuate?
The loss of the light oil in the line between the gauge and the engine.
What is the range of pressure needed for a fuel pressure gauge used with a float carburetor?
Normally from 1 to 25 psi.
What kind of indicator mechanism is used to measure oil pressure?
A Bourdon tube.
What kind of indicator mechanism is used to measure manifold pressure?
A differential bellows.
