The U.S. Federal Aviation Administration has embarked on sweeping regulatory updates aimed at rejuvenating innovation in general aviation. A centerpiece of this effort is the Modernization of Special Airworthiness Certification (MOSAIC) rule, a final regulation signed July 18, 2025 [1] that overhauls how light-sport aircraft (LSA) are defined and certified.

Introduction: Modernization in Aviation Regulation

In parallel with MOSAIC, the FAA has embraced other forward-looking changes, from adopting performance-based certification standards for small airplanes (the Part 23 rule overhaul effective 2017) to revisiting the decades-old ban on civil supersonic flight. This article examines MOSAIC in comparison to the Part 23 reforms and traditional FAA certification, discussing what’s new (and what isn’t), the opportunities and challenges these changes bring, and how they align with broader shifts in aviation policy. We will also touch on how these changes compare internationally. The discussion is detailed and technical, geared toward those familiar with airworthiness and certification.

Part 23 “Rewrite”: Bringing Legacy GA Certification into the 21st Century

To understand MOSAIC’s significance, it helps to recall the recent transformation of 14 CFR Part 23, which governs airworthiness standards for normal-category small airplanes. In 2017, the FAA implemented a major Part 23 reform [2], shifting away from rigid, prescriptive design rules toward a performance- and risk-based framework. Mandated by Congress via the Small Airplane Revitalization Act of 2013, this rewrite took effect in 2017–2018 and fundamentally changed how small aircraft (generally up to 19 passengers or 19,000 lbs) are certified:

From Prescriptive Rules to Performance Standards. The old Part 23 contained hundreds of detailed requirements dictating specific design features. The new Part 23 (Amendment 23-64) replaces these with broader safety objectives and performance-based criteria. It categorizes airplanes by size and complexity (Levels 1 through 4) and by speed (low-speed vs. high-speed) so that requirements scale with the aircraft’s risk. For example, a simple two-seat piston trainer faces proportionally simpler certification targets than a pressurized turboprop. This tiered, outcome-focused approach lets manufacturers meet safety goals in flexible ways rather than following one-size-fits-all rules.
Consensus Standards as Means of Compliance. Instead of prescribing exactly how to meet each objective, the FAA now allows manufacturers to use industry-developed consensus standards (accepted by the FAA) to demonstrate compliance. For Part 23 aircraft, committees such as ASTM International’s F44 have developed standards that the FAA formally recognizes as means of compliance. This innovation decentralizes and accelerates certification. If a new technology arises (say, an advanced avionics system or electric propulsion method), the consensus standards can be updated to cover it without needing to rewrite the regulations. The FAA’s role becomes one of approving these standards and verifying that applicants follow them, rather than micromanaging technical design details in the rules.
Technology-Neutral, Innovation-Friendly Requirements. The rewritten Part 23 is intended to be technology-neutral. It focuses on essential safety outcomes (handling qualities, structural integrity, system reliability, etc.) rather than forbidding or favoring particular solutions. This opened the door for novel designs and modern equipment: for instance, electric or hybrid propulsion systems, fly-by-wire controls, full glass cockpits, composite airframes, and even certain VTOL configurations can now be certified under Part 23 without needing special exemptions. As long as the aircraft meets the performance and safety criteria via accepted means of compliance, the regulations will accommodate it.
Improved Certification Efficiency. A primary goal of the Part 23 overhaul was to reduce the cost and time required to certify new light aircraft, thereby encouraging development of safer and more affordable airplanes. By eliminating archaic rules and leveraging modern standards, this reform was expected to lower barriers for new entrants and also encourage safety enhancements in the existing fleet. Industry groups like AOPA noted that the changes removed outdated constraints that “had long hindered the development and implementation of new technologies” in general aviation [3].

In summary, the Part 23 rewrite was a comprehensive modernization of airworthiness standards for small certificated aircraft. It moved the regulatory model from prescriptive checklists to flexible, outcome-based criteria, an approach that larger categories (such as Part 25 transport airplanes) have not adopted, but which made sense for light GA. This successful paradigm shift in Part 23 set the stage for applying similar thinking to other segments of aviation certification, paving the way for initiatives like MOSAIC.

What is MOSAIC?

MOSAIC stands for “Modernization of Special Airworthiness Certification.” It represents the FAA’s effort to update and expand the rules for light-sport aircraft and related certification provisions. The final MOSAIC rule, issued in July 2025, is the first major overhaul of the LSA category since its creation in 2004. Unlike Part 23 (which prescribes standards for type-certificated airplanes), MOSAIC primarily involves changes to 14 CFR Part 21 (the certification procedures for aircraft) and introduces a new 14 CFR Part 22 that defines performance-based criteria for LSA. In essence, MOSAIC redefines what qualifies as an LSA and how these aircraft can be built and used, greatly enlarging the sandbox for light recreational and training aircraft without requiring them to undergo full type certification.

Background. The original LSA regulations (circa 2004) tightly constrained light-sport aircraft to keep them simple. An LSA was limited to two seats, a maximum takeoff weight of 1,320 lbs (1,430 lbs for seaplanes), a top speed of 120 knots, a stall speed no more than 45 knots, and only a single non-turbine engine with fixed propeller and fixed landing gear. In exchange for staying within these limits, LSA manufacturers did not need full FAA type certificates. They could self-certify compliance with industry consensus standards (ASTM F37) and receive a special airworthiness certificate for each aircraft. Pilots could fly them with a Sport Pilot license, which has lighter training and medical requirements than a Private Pilot certificate.

This framework was innovative in 2004 and lowered barriers to flying, but over two decades it became clear that the hard limits were too restrictive. Many small legacy airplanes and promising new designs just missed one criterion or another (for example, a classic 1940s two-seater that weighs 1,600 lbs, or a modern two-seat trainer that cruises at 140 knots). Such aircraft, although still “light” and potentially safe, fell outside LSA and thus required conventional certification, often rendering them economically unviable. Meanwhile, technology progressed to a point where a slightly heavier or faster small aircraft could still be very safe (e.g. robust composite structures, ballistic parachutes, advanced avionics). The LSA rules were due for an update.

Key Changes Under MOSAIC. The MOSAIC rule makes targeted but significant changes to liberalize the LSA category and update its certification process:

No more fixed weight limit. The old maximum weight cap (1,320 lbs) is removed. Instead of a weight threshold, an LSA is now defined by stall speed and other performance metrics. Under MOSAIC, an LSA must have a stalling speed not exceeding 59 knots (calibrated airspeed) in the “clean configuration” [4]. This roughly correlates with the previous weight limit but allows much heavier aircraft as long as they have benign stall characteristics. By using stall speed as the limiter, the FAA gives designers far more flexibility: an aircraft can be larger and more capable as long as it doesn’t stall too fast. In practice, this change means LSA designs could approach the size and weight of traditional four-seat airplanes (on the order of 2,000–3,000 lbs or more), a dramatic expansion of the category’s envelope without specifying a hard number in the rules.
Higher speed and more performance. In addition to stall, the rule raises the velocity envelope. The previous 120-knot (≈138 mph) cruise speed limit is gone, LSAs are now allowed to operate up to 250 knots in level flight. While no current light aircraft will come close to 250 knots, removing the artificial speed cap encourages more aerodynamically efficient designs and leaves room for future improvements. Similarly, features that were previously forbidden because they enable higher speeds are now allowed: retractable landing gear and controllable-pitch propellers, once prohibited on LSA, are explicitly permitted under MOSAIC. The higher stall speed limit (up from 45 knots to roughly 59 knots) is a trade-off to allow heavier airplanes, but it still keeps LSA in a relatively low-energy regime compared to standard-category aircraft.
Increased seating capacity. LSA airplanes may now have up to four seats (pilot plus three passengers). Previously, two seats was the absolute limit. This change enables family travel or carrying more than one student at a time in a training environment. Importantly, the FAA did not correspondingly raise Sport Pilot license privileges to four seats, a Sport Pilot is still limited to carrying one passenger regardless of the aircraft’s seating capacity. By decoupling the aircraft’s capabilities from the pilot’s certificate limits, the FAA expanded design freedom while managing risk on the operational side. For LSA categories other than airplanes, such as gyroplanes, gliders, or helicopters, the seating remains limited to two for now.
Broader range of aircraft types. The LSA category is no longer confined to simple fixed-wing airplanes. MOSAIC allows certain helicopters and powered-lift aircraft (e.g. small helicopters, gyroplanes, or VTOL designs) to qualify as LSA, provided they meet the same performance and seating criteria. Previously, rotorcraft and VTOL were categorically excluded. Now, a two-seat helicopter or a lightweight winged eVTOL could potentially be developed and certificated as an LSA. Sport pilots won’t initially have privileges to fly a powered-lift, and a Sport Pilot would need a rotorcraft add-on to fly an LSA helicopter, but the door is open for these aircraft with appropriately rated pilots.
Advanced technology and propulsion allowed. MOSAIC removes many of the old restrictions on propulsion and control systems. Electric and hybrid powerplants, turbine engines, multi-engine configurations, and novel flight controls are all allowed in LSA designs under the new rule. The previous rules allowed only one piston engine, now an LSA can have a turboprop or even a small jet engine, twin engines, etc., as long as it stays within the performance envelope. The rule also references “simplified flight controls,” implying that automated or augmented control systems (such as stability augmentation or flight envelope protection) can be incorporated to make these aircraft easier and safer to fly.
New certification standards (Part 22). To accommodate the above changes, the FAA created Part 22, which consolidates the design and performance criteria defining an LSA. Part 22 spells out the limits on stall speed, seating, and other features that an aircraft must meet to be eligible for a light-sport certificate. This approach (placing all criteria in one dedicated part) makes future adjustments easier and removes the need to hard-code such details in the general definitions. Correspondingly, Part 21 (the certification procedures) was amended so that the section on Special Light-Sport Aircraft (§ 21.190) now refers to Part 22 for the LSA criteria. If an aircraft’s design stays within the Part 22 envelope and it is manufactured in accordance with FAA-accepted consensus standards, the FAA can issue it a Special LSA airworthiness certificate.
Self-certification via Statement of Compliance. The core certification approach for LSA remains as it was: manufacturers self-certify that their aircraft meet all applicable requirements, rather than the FAA certifying the design via a Type Certificate. Under MOSAIC, a manufacturer continues to submit a Statement of Compliance (SOC) for each LSA model, affirming it meets FAA-accepted consensus standards and Part 22 criteria. The FAA then issues a Special Airworthiness Certificate for each production aircraft if all is in order. No FAA Type Certificate or Production Certificate is required for the design. MOSAIC does, however, strengthen FAA oversight of this process: manufacturers must implement quality systems and will be subject to FAA audits and monitoring. The idea is to preserve safety while “significantly reducing regulatory burdens and costs for manufacturers” [5].
Expanded operations and aerial work. The MOSAIC rule also broadens what one can do with an LSA. Previously, LSA were mostly limited to personal/recreational flying and flight training; with few exceptions, they could not be used in paid operations. Now, the FAA will allow LSA (flown by appropriately rated pilots) to be used in certain commercial “aerial work” operations: aerial photography and surveying, banner towing, pipeline and powerline patrol, agricultural observation, search-and-rescue, and glider towing. While LSAs still cannot be used to carry passengers or cargo for hire, this change enables new business models. Flight schools will also be able to use LSA more broadly for paid flight training (beyond just sport-pilot training), which could help refresh the aging fleet of trainers with modern, economical planes.

Taken together, MOSAIC represents a dramatic liberalization of the light end of general aviation. The FAA broadens the types of aircraft eligible for LSA certification, encompassing larger and more advanced airplanes, rotorcraft, and powered-lift models, up to four seats, with the previous weight restriction eliminated [5], and introduces limited commercial use. It stops short of overhauling the entire certification system: standard-category aircraft still follow Parts 23, 25, etc., and LSA manufacturers must still comply with consensus standards. But the FAA has created a much larger space in which manufacturers can innovate without a conventional type certificate, relying on performance limits and industry standards to maintain safety.

Part 23 vs. MOSAIC: Different Paths to the Same Goal

Both the Part 23 rewrite and the MOSAIC initiative reflect the FAA’s shift toward performance-based, risk-calibrated regulation, but they apply to different segments and take different approaches. In essence, Part 23 modernization made it easier to certify new conventional GA airplanes, whereas MOSAIC allows certain aircraft to bypass traditional certification by operating within defined limits. Key contrasts include:

Scope and certification category. The Part 23 rule overhaul applied to normal-category, type-certificated airplanes (light general aviation aircraft up to a certain size). It affected how manufacturers obtain a Type Certificate and a standard (certified) airworthiness certificate for those models. MOSAIC, by contrast, deals with Special (Light-Sport) airworthiness certificates, i.e. aircraft that do not receive an FAA type certificate. The MOSAIC changes primarily affect light-sport and experimental categories, expanding what can qualify as an LSA and how such aircraft are approved.
Regulatory approach. The Part 23 rewrite was a comprehensive restructuring of the airworthiness standards themselves. It replaced prescriptive requirements with flexible, performance-based rules and built the use of consensus standards into the certification process. MOSAIC leaves the fundamental process (industry self-certification via ASTM standards) intact for LSA, but dramatically broadens the design parameters allowed under that process. One might say Part 23 reform was a “top-down” rewrite of the rules for certifying small planes, whereas MOSAIC is a “bottom-up” expansion of which planes don’t need that certification in the first place.
Certification outcome and oversight. Under Part 23, a manufacturer goes through the FAA type certification process (albeit streamlined) and ends up with an FAA-approved type design and a standard airworthiness certificate for each aircraft. Under MOSAIC, a manufacturer does not obtain a Type Certificate at all; instead, it self-declares compliance and each aircraft receives a Special LSA airworthiness certificate. The FAA’s involvement is indirect, reviewing the company’s compliance data, accepting the consensus standards, and auditing manufacturing, rather than formally approving every design detail.
Aircraft complexity and capability. Part 23’s updated standards enable certifying innovative or complex small airplanes (electric propulsion, advanced avionics, etc.) within the normal category, but those aircraft must still meet all stringent Part 23 safety requirements. MOSAIC allows aircraft approaching normal-category size and performance to be produced without a type certificate (and its associated costs) as long as they remain within the LSA limits. There is now intentional overlap: some designs that previously would have required Part 23 certification (e.g. a four-seat, 140-knot cruiser) might be offered as LSA if they can satisfy the stall speed and other Part 22 criteria.
Operational use and pilot requirements. Airplanes certified under Part 23 (standard category) can be used for a wide range of operations, including commercial ones (air taxi, flight training, etc., under the applicable operating rules). They also generally require at least a private pilot license to fly. Light-Sport Aircraft under MOSAIC remain largely for personal/recreational use (aside from the limited aerial work roles), and they can be flown by Sport Pilots, but with important limitations. Sport Pilots are still restricted to one passenger and daytime/VFR flying, and they must get additional training endorsements to operate LSA with certain advanced features (e.g. a controllable-pitch propeller or retractable gear).

Despite these differences, the philosophy behind Part 23 reform and MOSAIC is aligned: both aim to right-size regulatory burdens to the level of risk and to stimulate innovation in aviation. Part 23 reformed the rules for how GA designs are certified; MOSAIC reforms the scope of what needs formal certification. Together, they create a continuum from lightly regulated sport aircraft up through fully certified commercial aircraft, with consistent use of performance-based standards along that spectrum.

New Opportunities on the Horizon

By loosening the constraints on light aircraft design and certification, MOSAIC (along with the Part 23 changes) opens up a range of opportunities for the aviation community. These regulatory shifts are widely expected to inject new energy into general aviation. Some of the key upsides include:

Innovation and new entrants. Removing the weight and speed shackles from LSA could unleash a wave of new aircraft designs and new manufacturers. Companies that previously found the cost of type-certifying an aircraft prohibitive may now enter the market by producing compliant LSA under ASTM standards. Eliminating TCs and PCs “lowers barriers to entry” [5] and could enable non-traditional manufacturers, including automotive and tech firms, to build aircraft. We might see fresh ideas in personal aircraft, from sleek four-seaters with modern safety features to small rotorcraft or electric-powered planes, all developed at a fraction of the usual certification cost. The prospect of faster time-to-market and lower regulatory costs is also attracting interest from investors and venture capital [5].
Revitalizing personal aviation. General aviation in the U.S. has been stagnant for years, high prices for new airplanes and a declining pilot population have been persistent challenges. MOSAIC directly targets the affordability and utility of small aircraft, which could help revive interest in personal flying. With four-seat, 140+ knot LSA on the horizon, a pilot could own a modern airplane suitable for family trips or business travel at significantly lower cost than a comparable type-certificated model. By making aircraft “actually useful for transportation” [6] yet not requiring an elite level of training or money to fly, the FAA is opening the door to much broader participation in aviation. At EAA AirVenture 2025, leaders hailed MOSAIC as “Sport Pilot 2.0 and LSA 2.0,” predicting that within a year new modern aircraft would begin entering the fleet with “minimal certification costs” [4].
Growth in flight training and Sport Pilot ranks. By expanding the envelope of what counts as an LSA, the FAA has effectively made a large portion of the existing GA fleet accessible to Sport Pilots. Under the new rules, as long as an aircraft meets the LSA performance and seating criteria (even if it was originally standard-certified), a person exercising Sport Pilot privileges can fly it (limited to one passenger, daytime, etc.). EAA estimates that roughly 75% of the general aviation fleet is now within the LSA definition [4]. A Sport Pilot is no longer restricted to a tiny set of aircraft. They could fly many common Cessna, Piper, or Beechcraft models. This greatly increases the utility of the Sport Pilot certificate and could draw more people into aviation via that simpler licensing path.
New aerial work opportunities. The allowance for LSA to perform certain commercial operations is another avenue for growth. Entrepreneurs and small businesses could use inexpensive light-sport aircraft for tasks like pipeline patrol, aerial photography, banner towing, or powerline inspection, jobs that currently might require much costlier certified aircraft or helicopters. Using an LSA for these tasks can dramatically cut operating costs. By explicitly permitting these activities, the FAA has given the green light to innovative uses of light aircraft. These changes “may support the development of new revenue streams and business models for operators” [5].
Supersonic and beyond, a culture of “yes”. MOSAIC is part of a larger shift in aviation policy that signals the FAA’s willingness to enable new technology. Another high-profile example is the reversal of the 50-year ban on civilian supersonic flight over land. In June 2025, a Presidential executive order directed the FAA to repeal the old prohibition (14 CFR 91.817) and to develop noise-based standards for supersonic operations [7]. The language of that order explicitly criticized “outdated and overly restrictive regulations” that had stifled American ingenuity in high-speed flight. While the supersonic initiative mostly concerns transport-category projects, it is emblematic of a broader pro-innovation mindset at the FAA. In recent years the agency has shown flexibility on drones, urban air mobility, commercial space launches, and now supersonic and expanded LSA.

Risks and Challenges

Alongside the optimism, it’s important to recognize the risks and challenges that come with these regulatory changes. By expanding design freedoms and reducing upfront FAA oversight, MOSAIC introduces some new uncertainties that industry and the FAA will need to manage carefully:

Maintaining safety oversight. Light-sport aircraft have had a decent safety record overall, but data indicate that LSA accident rates have been somewhat higher than those of comparable certified aircraft [8], underscoring the need for vigilance. With MOSAIC introducing larger and faster designs into this category, the safety oversight model (reliance on standards and manufacturer self-policing) will face greater demands. The ASTM consensus standards must be rigorous and kept up to date for the new technologies now allowed, and manufacturers, some of whom may be new to aviation, must uphold a strong safety culture and engineering discipline even without direct FAA design approval. A cluster of design-related accidents could quickly erode confidence and prompt regulators to clamp down.
Insurance and liability considerations. The insurance industry may be wary of non-type-certificated designs until a track record proves their safety. Initially, insurers could charge higher premiums for a brand-new MOSAIC-built airplane than for a comparable type-certificated model. Manufacturers also assume full product responsibility in this regime, which could increase their liability exposure (since there is no FAA-certified type design to point to). Over time, if these new aircraft demonstrate equal or better safety than legacy designs, insurance rates and liability concerns should ease.
Market acceptance and economic viability. Regulatory change alone doesn’t guarantee a flood of new products or buyers. A critical question is whether MOSAIC aircraft will actually be significantly cheaper (for the capability offered) than conventionally certified models. Certification cost is only one component of price, expensive engines, avionics, or simply low production volume can keep aircraft prices high regardless. If a new four-seat LSA ends up costing around $300,000, it will face stiff competition from used certified airplanes that deliver similar utility. Manufacturers will need to leverage their new design freedom to truly drive costs down, for example, by using automotive-grade components or simpler production methods that were hard to approve under old rules.
Pilot training and proficiency. Sport Pilot training was designed around very simple aircraft; now the category includes machines that fly higher and faster, or even handle differently (e.g. gyroplanes or other new configurations). Without additional training, a low-time pilot might jump into an aircraft beyond their skill level. To mitigate this, MOSAIC requires Sport Pilots to get extra endorsements for advanced aircraft features and performance, and the FAA is updating training syllabi and tests accordingly. Instructors and examiners will need to emphasize prudent progression and offer transition training as pilots move up to more capable LSAs.
Global harmonization (or lack thereof). Other regions have their own limits and categories for light aircraft, Europe’s national microlight class is generally capped at 600 kg, and EASA’s Light Sport rules are narrower than the new U.S. ones. A new U.S. LSA that is much heavier or faster might not fit into those foreign categories without obtaining a conventional certification overseas. This patchwork of rules could complicate exports or cross-border operation in the short term. In time, authorities like EASA may adjust their definitions, but for now U.S. manufacturers will need to navigate a fragmented international landscape.

U.S. and European Frameworks

It is instructive to compare these regulatory developments with what’s happening in Europe, and to place the “safety continuum” of GA in context with the stricter world of large commercial aircraft.

European light aircraft regulation. Historically, Europe took a somewhat different path for entry-level aviation. Many European countries have national ultralight/microlight categories that long limited two-seat sport aircraft to around 450 kg (992 lbs) maximum weight. In 2018, the EU allowed member states to opt out of EASA oversight for aeroplanes up to 600 kg MTOW, effectively raising the microlight limit to match the original U.S. LSA definition. By 2020–2021, most European countries had adopted this 600 kg class under their national rules. Meanwhile, EASA has been moving in parallel with performance-based standards for certified aircraft: it overhauled CS-23 in line with the FAA’s Part 23 reforms, and it has been developing a “Part 21 Light” process for certifying aircraft up to 2,000 kg more simply. Europe recognizes the same need to make entry-level aviation more accessible. However, so far it has not eliminated weight and performance limits to the extent the U.S. now has. A 1,500 kg, four-seat airplane without conventional certification isn’t yet allowed in Europe. It may take time, and practical evidence from the U.S. experience, for international standards to catch up if MOSAIC proves successful.

The Part 25 Perspective

The safety continuum, GA vs. Part 25. The concept of a safety continuum is key to understanding why regulators allow more flexibility for some aircraft and not others. Airliners certified under Part 25 achieve incredibly low accident rates (on the order of one in many millions of flights) through strict standards, rigorous testing, and extensive oversight, because they carry hundreds of people and fly over populated areas, the tolerated risk is near zero. By contrast, private general aviation accepts a higher level of risk: accidents in personal flying are several orders of magnitude more frequent (per flight or per hour) than in airline service, yet society tolerates this because far fewer lives are at stake and GA operations are not for hire. Ultralights and LSAs historically have had higher accident rates still, which is viewed as an acceptable trade-off for the freedom and simplicity they offer. This safety continuum approach is deliberate: regulators set the bar commensurate with the activity’s scale and risk profile. Part 23 reform and MOSAIC both reflect this philosophy. They relax burdens where a failure would have relatively limited public impact, and in fact seek to improve safety by making modern designs and equipment easier to bring into service.

Innovations in light aviation often trickle up to larger aircraft over time. Technologies like composite airframes and glass cockpits were proven on small planes and homebuilts years before they became mainstream in airliners. By accelerating the adoption of things like electric propulsion or automation in small aircraft, MOSAIC could indirectly pave the way for these advances to be validated and eventually used in commercial aviation. Progress made at the light end can inform and inspire progress at the high end.

Conclusion: A Shift in Aviation Policy

The introduction of the MOSAIC rule, alongside the Part 23 reforms and other recent initiatives, marks a profound shift in how the FAA approaches aviation regulation. After a long period of gradual adjustments and technology often outpacing the rules, we are now seeing regulator-enabled innovation. The FAA is essentially saying: we can achieve our safety objectives without dictating every detail, and we’re willing to adjust our rules to let new ideas take flight. This represents a more collaborative and forward-looking mindset, in which regulators, industry, and pilots share responsibility for advancing safety and capability.

Such a paradigm requires a high degree of trust and professionalism. The FAA is extending trust to manufacturers (to design and build safe aircraft under looser constraints) and to pilots (to operate within limitations and seek appropriate training). In return, industry stakeholders must uphold their end, by rigorously following standards, ensuring quality, and swiftly addressing any safety issues that arise. If done right, this approach can deliver big gains in innovation without compromising safety. The ultimate goal is not innovation for its own sake, but a thriving aviation sector: more efficient training, more affordable personal aircraft, and new services and technologies that benefit the public.

Over the next few years, we will find out if this bold regulatory experiment pays off. Signs of success would include a wave of new LSA models coming to market, solid safety performance in the field, and a growing community of pilots drawn by these more accessible aircraft. If the results are positive, MOSAIC could be remembered as the catalyst for a new golden age of general aviation, one fueled by modern technology, lower costs, and broader participation.

For now, what’s clear is that MOSAIC has ushered in a new era for light aircraft. We are updating old rules and embracing new ideas: Sport Pilots will have access to a much broader fleet, and engineers have more freedom to design the next generation of personal aircraft. The aviation community has been given a mandate to move forward, and it will be up to all of us to ensure this new freedom is used wisely and safely.

References

Federal Aviation Administration, “Modernization of Special Airworthiness Certification (MOSAIC)”, Final Rule, July 2025.
Federal Aviation Administration, Part 23 (14 CFR 23) Airworthiness Standards Amendment 64, Final Rule, December 2016.
AOPA, “Part 23 reform takes effect,” AOPA ePilot Newsletter, 6 September 2017.
Experimental Aircraft Association (EAA), “MOSAIC Is Done!” AirVenture news release, 25 July 2025.
Marc Nichols and Erin Rivera (DLA Piper), “FAA Issues Final MOSAIC Rule: Key updates and changes,” 25 July 2025.
Eli Dourado, “Personal aviation is about to get interesting,” Substack, 23 October 2023.
The White House, Executive Order: “Leading the World in Supersonic Flight,” 6 June 2025.
Paul Bertorelli, “LSA Safety Record: Nothing to Celebrate,” Aviation Consumer, October 2019.