Aircraft Pre-Purchase Inspection: A Buyer’s Checklist

If you take one piece of advice when buying a pre-owned aircraft, make it this: never skip the pre-purchase inspection. It is the single most important risk control in the entire transaction, and it routinely uncovers issues worth many multiples of its cost. Here’s what a proper pre-buy covers and how to use it.

Use an independent MRO

The inspection should be performed by a reputable, independent maintenance organisation — not the seller’s shop. You (or your advisor) should attend or be represented. Independence is the whole point: you want findings that serve your decision, not the sale.

What a proper pre-buy covers

• Records & logbooks: complete, continuous history; gaps are red flags.
• Airworthiness Directive (AD) compliance: all mandatory actions done and documented.
• Damage history: prior incidents, repairs and how they were carried out.
• Corrosion & structural condition: a leading driver of unexpected cost.
• Engine & component status: time remaining, programme enrolment, borescope where applicable.
• Avionics & equipment: functionality and mandate compliance (ADS-B, etc. — see our avionics requirements guide).
• Parts traceability: proper release documentation for installed components.

Turn findings into leverage

A pre-buy produces a defect list. Use it: rectifications can be negotiated as seller-completed work, a price adjustment, or — when serious enough — a reason to walk away. A clean pre-buy gives you confidence; a revealing one saves you from an expensive mistake. Either outcome is a win.

Where it fits in the process

Where the inspection sits in the transaction

The pre-buy is not a standalone event; it sits inside a sequence. Typically a letter of intent establishes price and terms subject to inspection, a deposit goes into escrow, the aircraft is made available at an agreed facility, the inspection is performed, and the findings then drive either acceptance, renegotiation or withdrawal. Getting this order right matters: agree in writing, before the aircraft moves, who pays for the inspection, who pays to open and close panels, what happens to the deposit if you walk away, and what standard the aircraft must meet at delivery.

Define the delivery condition in the contract

The most valuable clause in an aircraft purchase agreement is usually the one defining delivery condition — for example that the aircraft will be delivered airworthy, with no outstanding mandatory items, with systems functioning, and with records complete. Without it, you are negotiating every discrepancy from scratch after you already have a signed price. With it, a large share of findings become the seller's obligation rather than your problem.

Sort findings into three buckets

Not every discrepancy is a negotiation. It helps to separate findings into airworthiness items that must be corrected before the aircraft can fly legally, contractual items that fall under the agreed delivery condition, and cosmetic or wear items that are simply the reality of a used aircraft. Buyers who try to litigate the third category tend to lose credibility on the first two; buyers who concede the first two lose money.

The findings that most often end deals

Some outcomes should give any buyer pause: missing or discontinuous records, particularly around major repairs; corrosion in structure that is expensive or impractical to access; damage history that was repaired outside approved data; engines or components approaching costly scheduled events with no programme coverage; and modifications carried out without clear approval paperwork. None of these are automatically fatal, but each shifts real cost and future liquidity onto you, and each should be priced deliberately rather than absorbed.

Records matter as much as metal

An aircraft's paperwork is a substantial share of its value. A technically sound airframe with gaps in its history is harder to insure, harder to finance and materially harder to sell later, because the next buyer will run the same inspection and reach the same conclusion. Time spent verifying that the records are complete, continuous and consistent with the physical aircraft is rarely wasted.

Use the result, do not just file it

Once the inspection is complete, the report becomes a working document. It sets your opening position in renegotiation, it forms the basis of the delivery punch list, and after closing it becomes the first entry in your own maintenance planning — telling you what is due, what was deferred, and what to budget for in the first year of ownership.

The inspection comes after you’ve agreed terms in principle but before you’re committed — that’s the window where its findings carry the most weight. Our acquisition advisory service coordinates the pre-buy, attends on your behalf and translates the report into negotiating position. For the full acquisition journey, start with the buyer’s guide.