How do regulatory authorities treat modifications that require a new or revised type rating?

• A. They require updated training and, if necessary, a new type rating endorsement for the modified aircraft.
• B. They automatically grant a temporary endorsement.
• C. They require no training if the modification is minor.
• D. They require only a knowledge test.

Answer: (C)

When a modification changes the aircraft’s type design enough to require a new or revised type rating, regulatory authorities require the pilot to complete approved training for the modified design and obtain the appropriate type rating endorsement before operating the aircraft. This training ensures the pilot is familiar with the new or changed systems, performance envelopes, and handling characteristics, and it is typically accompanied by a practical flight check. The process isn’t automatic, and a knowledge test alone does not establish proficiency for the modified aircraft.