What is considered a propeller major repair?

A propeller major repair involves significant alterations that can affect the operation and safety of the propeller. In the context of the question, straightening of aluminum blades is indeed classified as a major repair because it entails altering the structural integrity and aerodynamic characteristics of the propeller blades. Any modifications that involve reconfiguration or major adjustments of the propeller must follow specific standards, likely needing documentation and adherence to regulatory guidelines.

Similarly, the repair of a propeller governor is also considered a major repair. The governor plays a crucial role in managing the engine speed and controlling the pitch of the propeller blades. Functional issues with the governor directly affect the performance of the propeller and, as such, repairing it is classified as significant work that falls under major repairs.

Both activities require a thorough understanding of the systems involved, as they relate to the aircraft's safety and performance. Therefore, the correct answer reflects the fact that both actions qualify as a major repair due to their potential impact on propeller functionality and aircraft safety.