What is the difference between "overhauled" and "rebuilt" engines in aircraft maintenance?

The distinction between "overhauled" and "rebuilt" engines is significant in aviation maintenance, revolving around the standards and definitions each term encompasses. An "overhauled" engine refers to an engine that has been disassembled, cleaned, inspected, repaired as necessary, and reassembled to meet the manufacturer's specifications. This process assures that the engine meets current performance standards and safety regulations required for aviation operations.

On the other hand, a "rebuilt" engine typically implies that the engine has been restored to a previous standard, which may not necessarily align with current specifications. The term can sometimes suggest that certain components may be used or not upgraded to the latest standards, which is why "rebuilt" engines are treated differently in terms of regulation and testing.

In essence, "overhauled" engines are subjected to modern standards and requirements, ensuring they are in optimum working condition. This is critical for maintaining safety and reliability in aviation. Understanding this difference helps aviation technicians and mechanics ensure compliance with regulations and best practices in aircraft maintenance.