MOSAIC Moves Into Implementation: What Light-Sport Pilots and Buyers Need to Know

The FAA’s MOSAIC overhaul is moving from rulemaking into the practical business of aircraft certification. Aviation Pros reported on October 27 that the agency had published Order 8130.2M, updating its airworthiness-certification guidance to implement provisions of the Modernization of Special Airworthiness Certification final rule.

For light-sport pilots and prospective owners, the development is more than administrative housekeeping. Both principal phases of MOSAIC are now in effect, widening aircraft design possibilities and sport pilot access. But the expanded aircraft category and the expanded pilot privileges are not interchangeable—a distinction that should guide any purchase decision.

What has changed

MOSAIC’s final rule was published on July 24, 2025. Its first phase took effect on October 22, 2025, addressing sport pilot certification and privileges, light-sport repairmen and maintenance. The second followed on July 24, 2026, introducing the new aircraft-certification framework, including Part 22.

The previous light-sport definition generally limited aircraft to two seats, a maximum takeoff weight of 1,320 pounds—1,430 pounds for float-equipped aircraft—and a maximum level-flight speed of 120 knots. MOSAIC removes that defining weight ceiling and opens the framework to larger, more capable designs.

According to the detailed October 29 explainer from Aviator Finds, a new light-sport category airplane under Part 22 may have up to four seats, a landing-configuration stall speed of no more than 61 knots calibrated airspeed and a maximum level-flight speed of up to 250 knots calibrated airspeed. Its cabin must be unpressurized.

The framework also removes former restrictions on retractable landing gear and propellers, while accommodating new propulsion types, including electric power. These are permissions for aircraft development, not evidence that every possible configuration is already certificated or available for delivery.

The crucial distinction: 59 knots versus 61

Sport pilot eligibility follows a different test. For airplanes, the clean, flaps-up stall speed must be no more than 59 knots calibrated airspeed at maximum takeoff weight and the most critical center of gravity, according to the Aviator Finds account of Section 61.316.

That is not the same measurement as the 61-knot, flaps-down limit for new light-sport category airplanes. An aircraft can therefore meet the new certification framework without being eligible for operation by a sport pilot.

The four-seat allowance also does not authorize a sport pilot to fill all four seats. The one-passenger limit remains. Wider aircraft access does not confer commercial privileges or permission to carry paying passengers.

Recent coverage identifies the Cessna 172 and some Piper PA-28 aircraft as examples of the broader possibilities. Buyers should nevertheless evaluate the specific aircraft’s documented performance rather than assume that a familiar model name establishes eligibility. Simple Flying also reports that operating retractable landing gear or manually controlled variable-pitch propellers requires additional training.

Why the new FAA order matters

Order 8130.2M replaces Order 8130.2L and cancels earlier clarification, deviation and policy memorandums covered by the new order. Aviation Pros reports that it rewrites chapters addressing light-sport category aircraft and experimental kit-built and former light-sport category aircraft, and revises numerous operating limitations.

The order also removes the acronyms “ELSA” and “SLSA” from its text to align with removal of the former regulatory definition. That terminology change should not be mistaken for a blanket change to an individual aircraft’s airworthiness status. The practical focus for an owner remains the aircraft’s certification documents and applicable operating limitations.

A broader market, not an automatic bargain

Removing the old weight ceiling gives manufacturers more design latitude, including room for safety features and different structural or propulsion choices. It does not, by itself, establish lower purchase prices, reduced operating costs or immediate availability of new aircraft.

Aviator Finds reports that new light-sport aircraft and kits delivered under the framework must meet FAA-accepted consensus standards. Certification progress therefore matters alongside advertised specifications.

For prospective owners, MOSAIC makes the shopping list broader, but due diligence more important: distinguish certification eligibility from pilot eligibility, confirm the relevant stall-speed configuration, and establish the training and operating requirements before committing to an aircraft.