Definition
A category of aircraft defined by the FAA with strict limits on size, weight, speed, and complexity. To qualify as a Light Sport Aircraft, the aircraft must meet specific criteria including a maximum takeoff weight of 1,320 pounds (1,430 pounds for seaplanes), a maximum of two seats, a single non-turbine engine, fixed landing gear (with limited exceptions), a fixed-pitch or ground-adjustable propeller, an unpressurised cabin, and a maximum level-flight speed of 120 knots. LSAs may be flown by holders of a Sport Pilot Certificate or higher.
Plain English
A small, simple, lightweight aircraft that meets a specific FAA definition. It is limited in weight, seats, speed, and engine type, and can be flown by a sport pilot with less training than a private pilot needs.
Context Anchor
You will see LSA in discussions of sport pilot privileges, aircraft certification, flight school aircraft, and which aircraft a pilot is allowed to fly.
Derivation
The phrase comes from three plain English words: light (low weight), sport (recreational use), and aircraft. The FAA created this category in 2004 to open up flying to more people by allowing simpler aircraft and a less demanding certificate.
Why Pilots Care
Allows operation under a Sport Pilot certificate with reduced training hours and medical requirements, lowering the barrier to entry for recreational flying.
Intuition Check
“Light sport” does not mean any small or fun airplane. It means the aircraft meets the FAA’s specific light-sport limits.
Example Sentence 1
She earned her Sport Pilot Certificate and rents an LSA on weekends to fly to nearby airports for breakfast.
Example Sentence 2
Flight schools often choose LSAs because they cost less to maintain and insure than larger training aircraft.