Removal of propeller blade tips within Type Certificate Data Sheet limits when correcting a defect is considered?

The correct choice identifies the removal of propeller blade tips within the Type Certificate Data Sheet limits as a major repair. This classification is based on the significant implications such modifications can have on the structural integrity and performance characteristics of the propeller.

Major repairs are defined as alterations that may affect the operational safety or efficiency of the aircraft component. Since propeller blades play a crucial role in generating thrust and ensuring stable flight performance, any alteration, even if done within specified limits, requires careful consideration and regulatory adherence. Such repairs must typically be documented and may necessitate a new approval or inspection process to ensure compliance with aviation safety standards.

On the other hand, minor repairs or routine maintenance typically involve less significant alterations that do not affect the performance attributes or structural integrity of the component. Lastly, labeling this activity as unregulated would imply that it does not fall under any oversight or guidelines, which is not the case; all repairs must adhere to regulatory standards.