Same goal, different names
In aviation, prebuy inspection and pre-purchase inspection mean the same thing: a buyer-directed evaluation of an aircraft before closing. Some buyers shorten it to pre-buy. Some use PPI. Whatever the label, the purpose is to learn more about the aircraft's condition and records before the purchase becomes final.
A prebuy inspection is not a regulatory annual, 100-hour, or conformity inspection. It does not approve the aircraft for return to service. It is a voluntary, scoped review that helps the buyer decide whether to proceed, renegotiate, or walk away.
What a physical prebuy inspection covers
A physical pre-purchase inspection is performed by a mechanic or inspection facility, usually selected by the buyer. It examines the airframe, engine, propeller, systems, avionics, and observed condition within an agreed scope. Compression checks, borescope inspections, flight tests, and logbook review may or may not be included — it depends on what the buyer and the mechanic agree to.
The limitation is time. The mechanic has access to the aircraft for a defined period and inspects what is visible and accessible. They may not have time to reconstruct the full maintenance history, trace every alteration, or cross-check every AD and service bulletin unless that was explicitly scoped.
What a records pre-screen covers
A records pre-screen, also called a pre-buy records review or records intelligence audit, is research work done before the physical inspection. It reviews the logbooks, maintenance entries, FAA Form 337s, AD/SB status, STC/ICA continuity, and life-limited-part history to find patterns, gaps, and questions that should guide the physical inspection.
The output is usually an Inspection Targeting Brief or equivalent report: a list of what the records show, what they do not show, and what the mechanic should verify or investigate when the aircraft is opened. This makes the prebuy inspection more efficient and more focused on the risks that matter for that specific aircraft.
Why the order matters
Records first, inspection second. If the mechanic does not know that a major alteration was documented without a 337, that an AD was closed with a vague reference, or that a component was replaced under unclear circumstances, they may not know to look for it. A records review gives the mechanic a starting point for deeper questions before the inspection begins.
For the buyer, the records review also reduces wasted travel and inspection fees. If the records contain a fatal flaw that is visible on paper, the buyer can walk away before paying for a physical inspection, travel, or escrow.
What records cannot do
A records review does not replace the physical inspection. It does not confirm the current airworthiness of the aircraft, verify that a repair was performed correctly, or guarantee that the aircraft matches the records. The mechanic still has to examine the aircraft and verify conditions against primary data and approved sources.
How to scope the work
For a typical buyer, the sequence is: (1) records pre-screen to decide if the aircraft is worth pursuing; (2) if it passes, a physical prebuy or pre-purchase inspection by a qualified mechanic; (3) if issues arise, a deeper records audit or technical advisory to quantify the risk and cost of resolution.
Not every transaction needs all three. A clean, well-documented aircraft with a recent annual may only need a light records review and a focused physical inspection. An aircraft with sparse logbooks, damage history, or major alterations needs more.