AMP - Aviation Maintenance Technician Powerplant Practice Exam

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What indicates the timing for an engine overhaul?

  1. Engine temperature

  2. Time Between Overhaul (TBO)

  3. Fuel consumption

  4. Propeller RPM

The correct answer is: Time Between Overhaul (TBO)

The timing for an engine overhaul is primarily indicated by the Time Between Overhaul (TBO). TBO is a critical metric established by the manufacturer, which specifies the maximum hours or cycles an engine can operate before it must undergo a complete overhaul to ensure safety and reliability. This standard is based on extensive testing and observation, as well as operational demand, to determine when the components of the engine may start to wear to the point where they could compromise performance or safety. By adhering to the TBO, maintenance technicians can ensure that engines remain efficient and reliable throughout their service life. Waiting until TBO is reached prevents potential catastrophic failures that could arise from insufficient maintenance of critical engine components.

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