MOSAIC Expected In 2025
The Modernization of Special Airworthiness Certification (MOSAIC) final rule likely won’t be enacted until sometime in 2025. The comment period closed for the Notice of Proposed Rulemaking on the expansion of specifications for Light Sport aircraft in January and at the time hopes were high that the final rule would be ready for AirVenture 2024 in July. EAA spokesman Dick Knapinski said getting the complex rulemaking in place in that amount of time “would have been an impressive stretch” in ideal circumstances but it was further delayed by the need to reopen the comment period on a technical issue in February. The feeling now is that the final rule will be presented at either Sun ’n Fun or AirVenture in 2025.
PAFI Unleaded Fuel Ready In 2025
The End Aviation Gasoline Lead Emissions (EAGLE) consortium says the lone contender for the Congressionally-mandated Piston Aviation Fuel Initiative (PAFI) is projected to have a viable unleaded high-octane fuel with an FAA “fleet approval” before the end of 2025. The organization said a fuel developed by Lyondell/Basell and VP Racing is undergoing full static engine and flight tests and is so far performing as expected, but it may not be entirely compatible with a small number of piston engines. Ninety-one percent of piston engines on the FAA registry are made by Lycoming, Continental, and Rotax and the new fuel will be fine for them, but there are 143 manufacturers in the remaining nine percent and some may need modifications to their engines or operating procedures.
