The FAA’s Modernization of Special Airworthiness Certification (MOSAIC) performance-based rules; unleaded fuels including GAMI G100UL, Swift 94UL, and PAFI UL100E; and Van’s Aircraft’s bankruptcy top the general aviation news stories of 2023. Become a member of the world's largest aviation community at www.aopa.org/join. Listen on a podcast app or AOPA Online.