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What did MOSAIC do to the regulatory definition of light-sport aircraft in 14 CFR 1.1?

It was removed.

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  1. It doubled the old weight limit
  2. It removed the definition ✔
  3. It renamed light-sport aircraft as sport aircraft

Why: MOSAIC removed the 'light-sport aircraft' definition from section 1.1. Aircraft limits now live in Part 22 and sport pilot limits live in Part 61. Sport pilots are no longer tied to the old definition.

Huh, didn't know that: Sport pilots can now fly some aircraft that were not legal light-sport aircraft before.

The dad joke
What did the definition say when it was removed? 'I always did feel a little too heavy.'
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References

Answer: It removed the definition. MOSAIC removed the 'light-sport aircraft' definition from section 1.1. Aircraft limits now live in Part 22 and sport pilot limits live in Part 61. Sport pilots are no longer tied to the old definition.

  1. Federal Register, MOSAIC Final Rule (govinfo) www.govinfo.gov/content/pkg/FR-2025-07-24/html/2025-13972.htm
    This final rule adopts the proposal to remove the definition of
    Checked 2026-10-11.

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