Definition
An aircraft category defined by the FAA as having a maximum certificated takeoff weight of 12,500 pounds or less. This weight threshold is used in regulations to distinguish smaller aircraft from larger ones for purposes of certification, operating rules, and pilot requirements.
Plain English
A small aircraft that weighs no more than 12,500 pounds at takeoff, as set by the FAA. The term is a regulatory size category, not a description of how the airplane feels to fly.
Context Anchor
Seen in aircraft certification, operating rules, training materials, and general aviation discussions that separate smaller aircraft from larger ones.
Derivation
Light comes from Old English words meaning “not heavy.” In aviation, the word still points to weight, but it refers to the aircraft’s approved maximum takeoff weight, not how the aircraft feels or how easy it is to fly.
Why Pilots Care
Many regulations, type rating requirements, and operating rules apply differently above and below the 12,500-pound line. Knowing whether an aircraft falls inside the light category determines what rules and pilot qualifications apply.
Intuition Check
“Light” does not mean simple, weak, or easy to fly here. It means the aircraft is within a specific approved weight limit: 12,500 pounds or less for takeoff.
Example Sentence 1
Most training airplanes at the flight school are light aircraft, well below the 12,500-pound limit.
Example Sentence 2
Maintenance requirements for light aircraft are simpler than those for larger transport planes.