221,136 of the FAA's 315,010 currently registered aircraft — 70% of the entire US civil fleet — are single-engine, fixed-wing airplanes. This is the Cessna 172, Piper Cherokee, Cirrus SR22, Beechcraft Bonanza category: the aircraft most private pilots learn on, own, and sell to each other, and by far the most common used-aircraft transaction in general aviation.
What to check before buying one
Because it's the largest and most liquid category, it's also the one with the deepest resale history to check. The same public record applies to every one of them:
- Current registration status — active, expired, or a status flag worth asking about.
- NTSB accident and incident history under the current N-number.
- Prior registrants — how many times has it changed hands, and how recently.
- A serial-number cross-match — the check that catches an accident filed under a different N-number the airframe wore before a rebuild and re-registration. See our tail-number history check guide for why this matters more than a plain N-number search.
- Recent FAA filings — a bill of sale or security agreement recorded in roughly the last six months, which usually means the aircraft is actively changing hands right now.
Why this category specifically rewards checking
High volume cuts both ways: a popular single-engine airframe has a large used market and clear comparable pricing, but it also means damage history is common — training aircraft in particular see more incidents over a long service life than the average twin or turboprop that flies fewer, more closely supervised hours. A clean-looking logbook doesn't rule out a rebuild that happened under a prior N-number.
Look up a specific aircraft
Use our free tail-number lookup to check registration status and a summary of what a full report would show, or see our general pre-purchase checklist for the full buying process.