New Timeline Projected for MOSAIC Final Rule

Here’s when the new regulation affecting all aircraft with special airworthiness certificates is expected, according to an EAA official.

A wide range of light aircraft and the pilots that fly them will be positively affected by the implementation of MOSAIC. [Credit: Sling Aircraft]

The final rule on the Modernization of Special Airworthiness Certification (MOSAIC) is now expected sometime in 2025.

When the comment period closed for the MOSAIC Notice of Proposed Rulemaking (NPRM) in January, it was suggested that the final rule might be announced at EAA AirVenture in Oshkosh, Wisconsin, in late July, but that is no longer the expectation.

“It is correct that early to mid-2025 is expected to be the announcement of the final rule,” said EAA spokesman Dick Knapinski. “That’s been no secret. We’ve been telling those who ask that, based on our conversations with the FAA, most recently at our annual winter summit in Oshkosh in early March.”

Knapinski said the FAA sincerely wanted to get the rule ready for this year’s AirVenture, “but it would have been an impressive stretch even in the best of circumstances, given that the NPRM public comment period closed in early 2024. Any slippage would have made that even tougher.”

The timeline was also hit by the need to reopen comments for 30 days in February to backfill an omission in the original document.

The coming election will also use government resources that would be needed to process the new rule, which is intended to reduce certification burdens for new and legacy recreational aircraft while enhancing safety with new technology. Knapinski said the Department of Transportation will release its spring rulemaking plans in a few weeks, and that should give an official timeline for the MOSAIC rule.

Editor’s Note: This article first appeared on AVweb.

Russ Niles
Russ NilesContributor
Russ Niles has been a journalist for 40 years, a pilot for 30 years and joined AVweb in 2003. When he’s not writing about airplanes he and his wife Marni run a small winery in British Columbia’s Okanagan Valley.

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