Aircraft Pre-Buy Inspections: What to Inspect Before You Finance
A pre-buy inspection is an independent, hands-on look at an aircraft's condition and records before you commit to buy it, and it is not the same as an annual inspection. AOPA Aviation Finance advises using a qualified mechanic with no prior relationship to the aircraft, ideally one who knows the make and model, and agreeing the scope in advance because there is no universal standard. Do it before you finalize financing, so the findings can change the price, the loan amount or your decision to proceed.
Key takeaways
- A pre-buy is not an annual inspection unless both parties explicitly agree it will also serve as one, per AOPA Aviation Finance.
- Use an independent mechanic or shop with no prior relationship to the aircraft, preferably one experienced on the type.
- Agree the scope in writing before work starts, because there is no universal standard for what a pre-buy includes.
- Records matter as much as metal: 14 CFR 91.417 lists the maintenance and AD status records that must travel with the aircraft.
- Findings can lead you to proceed, renegotiate, request repairs or walk away, so build time for that into your financing timeline.
What is an aircraft pre-buy inspection?
A pre-buy inspection, also called a pre-purchase inspection, is an independent examination of an aircraft and its records that a buyer commissions before completing the purchase. AOPA Aviation Finance describes its purpose as assessing overall condition and likely future expenses, not only current airworthiness. It is meant to reveal problems that are not readily visible, such as corrosion, deferred maintenance and incomplete records.
For an operator who is financing the aircraft, the pre-buy sits between a signed purchase agreement and closing. It tells you what the aircraft will really cost to put into service, and it gives your lender a more reliable picture of the asset it is lending against. It works alongside, not instead of, the valuation work described in our guide to what an aircraft appraisal covers.
Is a pre-buy the same as an annual inspection?
No. Under 14 CFR 91.409, an aircraft generally needs an annual inspection within the preceding 12 calendar months, and aircraft used to carry passengers for hire or give flight instruction for hire also need an annual or 100-hour inspection within the preceding 100 hours of time in service. Those inspections determine whether the aircraft meets the inspection requirement. A pre-buy asks a different question: is this the right aircraft at this price, and what will it need next?
AOPA Aviation Finance warns that sellers often offer a fresh annual as a selling point, but a pre-buy only matches an annual if both parties explicitly agree. Flight schools and charter operators should pay particular attention here, because an aircraft that is in its 100-hour or annual window on delivery day may need that work soon after you take it.
Who should perform the inspection?
Use a licensed mechanic who is independent of the sale. AOPA Aviation Finance advises against the seller's shop or the aircraft's current mechanic, since a shop that has been working on the airplane may be too quick to praise its own work. It also recommends choosing a shop that specializes in the aircraft type, because a type specialist will know the common trouble spots and can point to them during price negotiations. Owner forums and type clubs are a common way to find one.
Be cautious if the seller is reluctant to give an objective third party access. AOPA treats a pushy or inflexible seller as a warning sign.
What should the pre-buy cover?
There is no universal standard for the scope of a pre-buy, so write the scope down with your mechanic before work starts. A practical scope for most piston and turboprop aircraft covers the items below. Turbine and jet aircraft add engine-specific programs, so confirm the details with the manufacturer's service network.
| Area | What to ask for | Why it matters to financing |
|---|---|---|
| Records | Full logbook review, AD compliance, Form 337 copies, service bulletin status, serial numbers | Gaps and missing entries can reduce value and complicate title and lender approval |
| Engine | Differential compression check on each cylinder at minimum, plus any type-specific checks | Engine time and condition drive both price and the reserve you will need |
| Airframe | Corrosion, previous repairs, landing gear, control surfaces | Damage history can reduce value depending on the damage and the components involved |
| Avionics and systems | Function checks and equipment list against what is installed | Installed equipment should match what the appraisal and loan assume |
| Flight | Test flight in the agreed conditions | Confirms the aircraft performs as the records suggest |
| Parts and support | Availability of parts for the type | AOPA notes that parts shortages can ground an aircraft |
What should you look for in the records?
Start with what the law requires the seller to hand over. Under 14 CFR 91.419, a seller must give the buyer the records listed in 14 CFR 91.417(a)(2) when the aircraft is sold. Those include total time in service for the airframe, engines and propellers, the status of life-limited parts, time since overhaul for time-based items, current inspection status, airworthiness directive status including the method of compliance and any recurring action due, and a copy of FAA Form 337 for each major alteration.
AOPA adds practical checks. Confirm the airworthiness certificate, engine and airframe logbooks, equipment list, weight and balance data, placards and flight manual are present and in order. Read the engine logs for unusual entries; AOPA gives the example that a note about replaced sections of fuselage skin should raise questions about a prior gear-up landing. Missing pages or entries can cause significant problems and reduce value.
AOPA also recommends a title search to find liens and other claims against the aircraft. That step is separate from the mechanical pre-buy and is part of closing, but it is worth starting early so surprises do not arrive late.
What do you do with the findings?
Ask the mechanic to separate findings into three groups: airworthiness directive items, other required repairs, and items that are merely nice to fix. AOPA Aviation Finance says no airplane is perfect, so decide in advance what you will accept and be ready to walk away if repair needs become too high. Depending on the results, you can proceed, renegotiate the price, ask for repairs or end the deal.
AOPA also notes that, unlike a home purchase, sellers are typically not pressured to pay for repairs unless it is an airworthiness issue. Expect price negotiation to be about the cost of known work, not an open-ended repair list.
In this hypothetical, the buyer should tell the lender about the revised price and the repair plan before closing. Lenders typically size the loan on the lower of price or appraised value, so a lower price normally means a smaller loan, and a lender may want evidence that known repairs are completed or funded.
How does the pre-buy fit into your financing timeline?
Plan for it in advance. AOPA says a typical pre-buy takes one or two days, and advises allowing more time than you think you need so you are not rushed as closing approaches. Practically, that means:
- Reserve the inspection slot as soon as the purchase agreement is signed, subject to a satisfactory pre-buy.
- Share the written report with your lender as soon as you have it, since it may affect value, price and required reserves.
- Resolve price changes before final documents are drawn up.
- Confirm the delivery condition in writing, including which repairs the seller will complete.
Our guide on what to prepare before applying for aircraft financing covers the broader document set, and the acquisition loans page explains how purchase financing is typically structured. Use the aircraft loan calculator to test how a price change or added repair reserve affects your payment.
Pre-buy checklist for operators
- Choose an independent mechanic or shop with type experience and no tie to the seller.
- Agree the scope, the price of the inspection, who pays and who moves the aircraft, in writing.
- Request the full logbook set and AD status before the aircraft arrives at the shop.
- Ask for a written report that sorts findings by AD item, required repair and optional work.
- Get repair quotes for each item so you can negotiate on numbers.
- Send the report to your lender and update the price and loan amount if needed.
If you are lining up an acquisition and want the inspection, valuation and lender requirements organized in one place, you can start a deal file with JetFinex. Confirm legal and regulatory questions about records, inspections and title with an A&P or inspection authorization holder and with aviation counsel.
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Frequently asked questions
Is a pre-buy inspection the same as an annual inspection?
No. AOPA Aviation Finance says a pre-buy only matches an annual if both parties explicitly agree. Its purpose is to assess overall condition and likely future expenses, not just current airworthiness. A fresh annual offered by the seller is not a substitute.
Who should perform the pre-buy?
AOPA advises a licensed A&P who is independent of the transaction and has no prior relationship to the aircraft, ideally with experience on that make and model. Do not use the seller's own shop.
How long does a pre-buy take?
AOPA Aviation Finance says a pre-buy for a typical piston aircraft usually takes one or two days, and advises allowing extra time. Larger or more complex aircraft take longer, so ask your inspection facility for an estimate.
What records should a buyer expect to receive?
Under 14 CFR 91.419, a seller must give the buyer the aircraft status records listed in 91.417(a)(2), including total time in service, life-limited parts, inspection status, AD compliance status and FAA Form 337 copies for major alterations.
Who pays if the pre-buy finds problems?
That is negotiated between buyer and seller. AOPA notes that sellers are typically not pressured to pay for repairs unless the issue affects airworthiness, so decide in advance what you will accept and be ready to walk away.
Sources
- AOPA Aviation Finance, Everything you need to know about pre-buy inspections
- AOPA Aviation Finance, The dos and don'ts of pre-buy inspections
- AOPA, Tips on buying used aircraft
- Cornell Law School LII, 14 CFR 91.417 Maintenance records
- Cornell Law School LII, 14 CFR 91.419 Transfer of maintenance records
- Cornell Law School LII, 14 CFR 91.409 Inspections
This guide is educational and is not tax, legal or investment advice. See our editorial standards and disclosures. Spot an error? Tell us.
