How may discrepancies to a Part 135 aircraft with an MEL be disposed of during periods of Part 91 operation?

The rationale for selecting the answer that discrepancies must be disposed of by the provisions of the aircraft's Minimum Equipment List (MEL) is based on regulatory compliance and safety standards. An MEL is a precise listing of equipment that may remain inoperative while the aircraft is still considered airworthy, and it is tailored to meet the specific aircraft type, ensuring proper maintenance practices and operational safety.

In situations where a Part 135 aircraft operates under Part 91, the MEL still applies. This means that any identified discrepancies on the aircraft must continue to be addressed according to the established procedures in the MEL. This ensures that the aircraft is maintaining the appropriate safety standards and that any items not operational are properly accounted for, documented, and managed according to the guidelines previously defined before transitioning to Part 91 operations.

This understanding reinforces the critical nature of adhering to the MEL, regardless of the operational context, emphasizing that safety and compliance with regulations take precedence at all times. Other options may imply alternatives that do not align with the regulations or best practices, such as assuming that a separate set of standards applies or neglecting discrepancies altogether, which could compromise the aircraft’s operational integrity.