MOSAIC Progressing, 2025 Approval Likely

New regs should be ready later this year.

Cayla McLeod
Gemini Sparkle

Key Takeaways:

  • The MOSAIC update at Sun 'n Fun revealed no hard timeframe but detailed key changes to Light Sport Aircraft (LSA) regulations.
  • MOSAIC proposes defining LSA by a performance-based standard, specifically a clean stall speed (currently 54 knots, proposed 58 knots), rather than a maximum gross weight.
  • Raising the stall speed to 58 knots could allow approximately 70% of existing single-engine piston aircraft to qualify as LSA, aiming to reduce costs and lower barriers to entry in aviation.
  • Despite delays, the proposal is expected for ratification around August, with new regulations taking effect 30-60 days after release.
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Sun ‘n Fun kicked off on Tuesday, April 1, with a highly publicized MOSAIC update that did not include any big reveal—nor did it offer a hard time frame for ratification of the proposal.

The panel, hosted by the Light Aircraft Manufacturers Association, featured a range of industry executives including Scott Severen, president and chairman of the board of the Light Aircraft Manufacturers Association; Darren Pleasance, president of the Aircraft Owners and Pilots Association; Jack Pelton, chairman of the board of the Experimental Aircraft Association; and Adam Morrison, vice chair of ASTM 37. 

“What all is in MOSAIC is so different than what is in our existing light sport requirements,” said Pelton. “The biggest change being that an LSA is defined by its weight at 1320 pounds maximum gross weight. Under MOSAIC, we get rid of the weight requirement completely and it goes to a performance-based standard. So any airplane that meets a set of performance parameters based on clean configuration stall speed. What has so far been agreed to by the FAA is 54 knots clean stall speed. We did in our comments ask to get that raised to 58.” 

Pelton later added that the stall speed increase of 4 knots would include approximately 70% of all “current single-engine piston aircraft in the fleet [that] would qualify to be flown as a light sport aircraft.” 

The four panelists noted that MOSAIC delays are largely due to the recent exchange of power at the White House; however, an estimated time frame is on the horizon. “We’re not hearing anything to suggest that this is at risk of being killed,” stated Pleasance. “There is pressure within the FAA to get this across the line. I’d love for it to happen in time for AirVenture … but somewhere in that time range seems to be about the right time.” 

“August is probably what we’re going to be looking at,” added Severen.

Pleasance noted that MOSAIC will expand opportunities for pilots within his organization and beyond. “A host of aircraft will be able to become used for light sport training and a light sport license,” stated Pleasance. “That can only reduce the cost. This will lower the barriers to entry and a lot of new folks coming into aviation.” 

Pilots should expect a 30- to 60-day waiting period after the rule is released before the new regulations take effect. 

Cayla McLeod

Cayla McLeod is an instrument-rated pilot with a love for all things tailwheel and grass strips. She has been actively involved in general aviation for the last decade, and can’t imagine life without flying and the people that go with it.
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