What to Expect at Your Annual Inspection
What an annual inspection covers, typical costs by aircraft type, and how to prepare.
What Is an Annual Inspection?
Every certified aircraft must undergo an annual inspection by an IA (Inspection Authorization) mechanic per 14 CFR 43 Appendix D. This is the most comprehensive inspection your aircraft receives — every system, component, and structure is examined. The aircraft cannot fly until discrepancies are addressed.
What Gets Inspected
The inspection covers: engine (compression, oil analysis, hoses, baffles, mounts, accessories), propeller (nicks, track, grease), airframe (corrosion, skin condition, control surfaces, hinges), landing gear (tires, brakes, struts, wheel bearings), avionics (operation checks, antenna condition), interior (seatbelts, placards, required instruments), and documentation (AD compliance, logbook entries, 337 forms).
Typical Costs by Aircraft
Simple fixed-gear singles (Cessna 172, Cherokee): $1,500–$3,500. Complex singles (Bonanza, Mooney): $3,000–$6,000. Light twins (Baron, Seneca): $5,000–$12,000. These are inspection-only costs — actual squawks (discrepancies found) can add $500–$5,000+ depending on what's discovered. A well-maintained aircraft has fewer surprises.
How to Prepare
Owner-assist can save 20–40% — clean the aircraft, remove interior panels, organize logbooks, and compile an AD list. Get your oil analysis done before the annual so results are ready. Fix known squawks beforehand so you're not paying the IA's shop rate for simple tasks. Most importantly, choose an IA who knows your aircraft type.