MOSAIC Implementations — FAA Releases Updated Advisory Circulars

As part of implementing the Modernization of Special Airworthiness Certification (MOSAIC) final rule, the FAA has issued updated advisory circulars (AC) affecting pilots, flight instructors, and light-sport repairmen. Three key ACs to be aware of are AC 61-65K, AC 65-32B, and AC 61-146, all of which align FAA guidance with the new MOSAIC framework.

AC 61-65K - Certification: Pilots and Flight and Ground Instructors

AC 61-65K replaces 61-65J and is now the primary endorsement and certification guidance under Part 61. In addition to new language reflecting updated sport pilot privileges, it adds several new sample endorsements tied to MOSAIC changes including those for night operations, controllable pitch propeller, and retractable landing gear. 

AC 65-32B - Certification of Repairmen (Light-Sport)
AC 65-32B replaces 65-32A and brings light-sport repairman guidance in line with MOSAIC. It updates terminology and guidance in line with the new rule’s changes to the light-sport repairman certificates, included the certificates’ expanded privileges involving experimental amateur-built aircraft.

AC 61-146 - Pilot Certification and Operations for Sport Pilots and Simplified Flight Controls
AC 61-146 is new and provides detailed guidance on sport pilot and sport pilot instructor certification, training, and operating privileges under MOSAIC, including which aircraft are sport pilot-eligible and what additional training or endorsements may be required (reiterating the regulatory language). It also explains the new simplified flight controls designation, outlining how pilots and instructors qualify and train in aircraft certificated with simplified controls. From a pilot certification perspective, simplified flight controls will primarily apply to sport pilots flying helicopters; simplified flight controls are a specific limitation of this category for sport pilots.