What must a pilot do if they modify the aircraft they are rated for, affecting the type rating?

• A. Notify the regulator, complete required differences/transition training, and obtain any revised endorsement if required.
• B. Ignore the modifications and continue operating as before.
• C. Only update the flight log.
• D. File a new medical certificate.

Answer: (A)

When a pilot has modified an aircraft they are type-rated for in a way that affects the certification, the authority to operate that aircraft can change. The type rating ties you to a specific configuration and set of operating procedures approved by the regulator. If the modification alters these elements, you must inform the aviation authority and complete any required differences or transition training to bridge from the original type rating to the modified aircraft. If the regulator requires it, you’ll also need a revised endorsement to reflect the updated designation. This ensures your qualifications match the actual aircraft you’re flying and keeps operations compliant and safe. Ignoring the changes, merely updating a flight log, or handling a medical certificate does not address the regulatory certification update required for the modified aircraft.