How to Prepare for Your Annual Inspection

What Is an Annual Inspection?

Under 14 CFR 91.409, most general aviation aircraft must undergo an annual inspection performed or supervised by an Inspection Authorized (IA) mechanic. This comprehensive inspection covers the entire aircraft — airframe, engine, propeller, and all installed equipment — and must be completed within the preceding 12 calendar months for the aircraft to remain airworthy.

The annual is one of the most significant maintenance events for GA aircraft. It's also one of the most variable in cost — preparation and communication with your IA can make a real difference in how smoothly (and affordably) the process goes.

Gather Your Records First

Before your aircraft goes to the shop, assemble everything your IA will need:

• Aircraft logbooks — airframe, engine, and propeller logs with all previous entries current.
• AD compliance records — a current list showing the status of every applicable Airworthiness Directive (see 14 CFR 91.417).
• Equipment list and weight & balance — especially if any modifications or avionics upgrades have been made since the last annual.
• Service Bulletin status — while most SBs are not mandatory, your IA may want to review them as part of the inspection.
• Squawk list — any issues you've noticed during the year (unusual sounds, minor discrepancies, deferred items from the last annual).

Communicate with Your IA

A pre-inspection conversation with your IA saves time and money. Discuss:

• Any squawks or concerns you've accumulated during the year.
• Whether you want to combine the annual with other scheduled maintenance (oil change, spark plug replacement, etc.) to reduce total downtime.
• Your budget expectations — ask your IA to call before performing any work beyond the standard inspection scope.
• Timeline expectations — how long will the aircraft be down, and what could extend that timeline?

Common Cost Drivers

Annual inspection costs vary widely depending on the aircraft type, condition, and what the IA finds. Some common factors that increase the bill:

• Deferred maintenance — items you put off during the year often surface during the annual and must be addressed before return to service.
• Corrosion — especially in coastal or humid climates, corrosion can require significant labor to address.
• AD compliance catch-up — if your AD records are incomplete, the IA may need to research and verify compliance status for each applicable AD.
• Incomplete records — missing or disorganized logbooks force the IA to spend extra time reconstructing maintenance history.

After the Annual

Once the inspection is complete and all discrepancies are resolved, your IA will make an entry in the aircraft's maintenance records and return the aircraft to service. Make sure you receive:

• A signed logbook entry with the IA's certificate number.
• An itemized list of all work performed, including any replaced parts.
• Updated AD compliance records reflecting any AD work done during the annual.

How TachMinder Helps You Prepare

TachMinder generates a pre-visit summary for your IA that includes your maintenance status, upcoming items, AD compliance list, and any open squawks — all in one document. Instead of showing up with a stack of loose papers, you hand your mechanic a clear, organized briefing.