What to Check Before Buying a Used Cessna 172

Over 44,000 Cessna 172s have been built since 1956, and a significant portion of them are still flying. For a first-time aircraft buyer, the 172 is often the first serious consideration — affordable to operate, easy to find parts for, well-understood by mechanics everywhere, and forgiving to fly.

But buying a used 172 isn't like buying a used car. The consequences of skipping due diligence are more severe, and the documentation requirements are more complex. This guide covers what to check, in the order you should check it.

Step 1: Run an N-Number Check Before You Even Call the Seller

Before you spend time on a phone call or drive to an airport to look at a plane, run a basic records check on the N-number. This takes five minutes and can immediately rule out aircraft with serious problems.

A pre-purchase report from Aeradex (free for your first one at aeradex.com) will show you:

• Lien and encumbrance status
• NTSB accident and incident history
• Chain of title — how many owners, any gaps
• Current AD compliance status
• Basic FAA registration data

If the aircraft has been in a reported accident or has an active lien, you want to know before you've invested time in an in-person inspection.

Step 2: Review the Logbooks

The logbooks are the aircraft's biography. For a 172, you should have:

Airframe logbook: Tracks the aircraft's total time, annual inspections, major repairs and alterations (337 forms), and damage history. Look for consistent entries, no unexplained gaps, and evidence of proper annual inspections every 12 months.

Engine logbook: Shows total time since new (TTSN) and time since major overhaul (SMOH). The O-320 and O-360 engines common in 172s have a manufacturer-recommended TBO (time before overhaul) of 2,000 hours. An engine approaching TBO isn't necessarily a dealbreaker, but it affects price and planning.

Prop logbook: Documents prop strikes, repairs, and overhauls. A prop strike — even a minor ground strike during taxi — requires inspection and documentation. Missing prop strike records are a red flag.

What to look for: entries written in multiple different handwriting styles without explanation, white-out or alterations, gaps in inspection dates, and vague descriptions of repairs.

Step 3: Check the Airworthiness Directives

ADs are mandatory maintenance requirements issued by the FAA when a safety issue is identified in a specific aircraft or component. For a Cessna 172, there are numerous recurring ADs — some require inspection at every annual, some at specific hour intervals.

The aircraft should have a current AD compliance record showing when each applicable AD was last complied with. Common 172 ADs include inspections related to fuel caps, elevator trim, and carburetor heat systems.

You can check AD status for any N-number using Aeradex's Hangar feature, which pulls current FAA airworthiness directive data automatically.

Step 4: Pre-Purchase Inspection

No amount of paperwork review replaces having an independent A&P mechanic look at the actual aircraft. Do not use the seller's regular mechanic — hire your own, or use a mechanic at a shop you choose.

A pre-purchase inspection typically includes:

• Compression check on all cylinders (should be above 70/80 for a healthy engine)
• Inspection of all major systems: fuel, electrical, flight controls, landing gear
• Corrosion check — especially in the tail section and under the floor
• Review of all logbook entries against the physical condition of the aircraft
• Flight check if possible

Expect to pay $300–$800 for a pre-purchase inspection depending on the shop and scope. It is the best money you'll spend in the buying process.

Step 5: Verify the Title and Registration

Request the aircraft's FAA records and verify:

• The seller is the registered owner and their name matches the current registration exactly
• There are no active liens or security agreements on file
• The chain of title is complete with no gaps
• Registration is current (not expired)

Aeradex pre-purchase reports include this title search information. You can also order aircraft records directly from the FAA registry.

Step 6: Confirm Insurance is Obtainable

Before closing, confirm you can actually get insurance on the aircraft at a rate you can afford. Call an aviation insurance broker (not your car insurance agent) and get a quote based on the aircraft's N-number, your pilot certificate, total hours, and hours in type.

Insurance for a 172 is generally affordable, but if you're low-hours in type or the aircraft has a damage history, premiums can be higher than expected.

Common Red Flags to Walk Away From

• Logbooks that are missing, incomplete, or show signs of alteration
• Undisclosed accident history (compare logbook entries to NTSB records)
• Active liens that the seller can't explain or resolve before closing
• A pre-purchase inspection that turns up significant corrosion or undocumented repairs
• A seller who won't allow an independent pre-purchase inspection

The Bottom Line

A used Cessna 172 is one of the best aircraft purchases a private pilot can make — if you do your homework. The research process described here takes a few days and costs a few hundred dollars. It's the cheapest insurance you'll ever buy.

Start with a free pre-purchase report at aeradex.com to get the aircraft's history before you go any further.