MOSAIC Moves From Rulemaking to Reality for Light-Sport Aviation

MOSAIC is now fully in effect, and the light-sport industry is beginning to show what the FAA’s regulatory overhaul means in practice. An October 12 AOPA report describes a widening range of aircraft proposals and deliveries, while a separate certification problem affecting powered parachutes illustrates that implementation still depends on the details of accepted industry standards.

For pilots and prospective owners, the change is substantial—but it is not a blanket authorization to operate every aircraft entering the expanded category. The Modernization of Special Airworthiness Certification rule separates aircraft certification requirements from sport pilot privileges, making those two sets of limits essential to understand.

Two frameworks, different limits

MOSAIC arrived in phases. Sport pilot training, certification and privilege changes took effect October 22, 2025, alongside other provisions. The new light-sport category aircraft certification rules followed on July 24, 2026, according to EAA Chapter 430’s regulatory overview.

Under the new Part 22 certification framework, fixed weight limits have given way to performance-based criteria. AOPA reports that light-sport category airplanes may have up to four seats, a flaps-extended stall speed of no more than 61 knots calibrated airspeed, and a maximum airspeed of 250 KCAS. The framework permits fixed or retractable landing gear and any number or type of powerplant except rockets.

Manufacturers can obtain airworthiness certificates for factory-built light-sport category aircraft through attested compliance with industry consensus standards. AOPA reports that the FAA accepted a full set of ASTM specifications for light-sport category airplanes on July 16, ahead of the certification provisions taking effect.

Sport pilot eligibility uses a different test. EAA Chapter 430’s overview explains that an airplane must, since its original certification, meet the applicable limits, including a clean, flaps-up stall speed of 59 KCAS or less at maximum takeoff weight. An eligible airplane may have four seats, but a sport pilot remains limited to one passenger.

The practical distinction is important: the 61-knot landing-configuration certification limit and the 59-knot clean-stall pilot-eligibility limit are not interchangeable. Nor does a four-seat light-sport certificate allow a sport pilot to fill all four seats. Additional training and a logbook endorsement are also required for sport pilots to operate retractable-gear aircraft or airplanes with manually controlled constant-speed propellers, according to the chapter’s overview.

Manufacturers begin to respond

AOPA’s October roundup offers evidence of an industry moving beyond regulatory anticipation. Van’s Aircraft recently delivered its first MOSAIC-compliant RV–12iS made for IFR and instrument meteorological conditions. Texas Aircraft expects its first Colt built under the new ASTM standards within six months, with increased useful load anticipated.

Other developments show the breadth of the design space. CubCrafters plans to offer its turboprop Carbon Cub ULT as either experimental amateur-built or light-sport category aircraft. Jabiru’s twin-engine J432 made its U.S. debut at AirVenture, while Zenith introduced the four-seat CH 750 Super Cruzer. Textron announced the Pipistrel Voyager, a two-seat trainer designed for the new certification rules.

These developments are not all at the same stage. A delivered aircraft, a newly introduced design and a planned certification represent different levels of availability. Buyers should distinguish those milestones and verify an individual aircraft’s certification, operating limitations and suitability for their own pilot privileges rather than treating “MOSAIC-compliant” as a complete answer.

A certification gap warrants attention

The transition has also exposed a problem outside the airplane segment. AVweb reported October 8 that Powrachute had petitioned the FAA for temporary relief to continue certifying newly manufactured powered parachutes while awaiting acceptance of a corrected ASTM integration standard.

Powered parachutes were excluded from the newly accepted standards, creating a certification gap. Powrachute’s request covers new light-sport aircraft and qualifying kit-built powered parachutes. At the time of AVweb’s report, the FAA had not ruled on the petition; comments remain open through October 26 under docket FAA-2026-11257.

The broader lesson is that MOSAIC expands possibilities without making every design immediately available or every operation permissible. For owners, its value will emerge aircraft by aircraft, through accepted standards, completed certification and capabilities that match the pilot’s qualifications.