Agree a model-specific review with a qualified independent provider, document records and system findings, and resolve technical, financing, insurance and contract conditions separately. Use the worksheet to track evidence and next actions, not to certify airworthiness.
How to use this piston-aircraft pre-buy checklist
A pre-buy checklist should help a buyer obtain evidence and make a purchase decision. It should not turn into an owner-performed maintenance procedure or a promise that every defect will be found. Use this guide to agree on the review with a qualified provider, organize records and findings, and coordinate financing and closing. Each candidate needs a scope appropriate to its model, configuration, history and proposed use. A recently completed annual inspection does not automatically answer every commercial question a buyer has.
AOPA's AOPA Aviation Finance: independent pre-purchase inspections recommends an independent reviewer familiar with the make and model. Ask who will perform the work and whether the provider has a relationship with the seller or prior maintenance. Independence and experience are both useful questions; neither eliminates the need for a defined scope. Ask the provider to identify limitations, not simply to pronounce the aircraft good. The buyer needs enough information to decide whether to proceed, investigate further or use an available contractual exit.
Download the blank piston pre-buy review worksheet. It is an ungated CSV for recording responsible people, evidence and next actions. It is not a regulatory inspection form, a technical signoff or a submission to Jaken Aviation. Save a working copy locally and keep private transaction details in the channels agreed with your advisers. The questions below explain how to use it without replacing professional judgment.
1. Define the mission and the acceptance conditions
Write down the expected passengers, baggage, typical trips, operating environment and desired equipment. Give that mission to an appropriately qualified pilot or instructor for aircraft suitability discussions. Confirm actual aircraft configuration and documents rather than relying on brochure performance or another owner's experience. A candidate can be mechanically acceptable yet unsuitable for the buyer's practical mission. Identify expensive equipment or training changes early, before the negotiated price becomes the only number receiving attention.
With counsel, specify the purchase conditions: inspection access, records delivery, deposit treatment, findings response, acceptance deadline and available remedies. Name the person who can authorize work and the spending limit that requires further instructions. Agree how extensions are documented if parts, specialist access or records delay the process. A checklist is easier to use when the agreement permits the required investigation and gives the parties a clear way to respond to its results.
Keep a separate list of lender, insurer, title or escrow and training conditions. Confirm the actual provider's requirements for this transaction. A verbal indication that similar aircraft can be financed does not establish approval of the candidate. Nor does a preliminary insurance discussion settle pilot qualifications or coverage effective dates. Coordinate these workstreams alongside the technical review so that an otherwise acceptable aircraft does not reach the closing table with an important condition still unanswered.
2. Agree on the provider, scope and authority
Ask the shop about relevant model experience, availability, tooling and specialist support. Establish which tasks are included and excluded, who receives the report and how findings will be documented. Discuss access, disassembly, reassembly and responsibility if the buyer declines the purchase. Ask whether a proposed test is part of the agreed review or an optional task that needs separate approval. These questions prevent the inspection from expanding through informal assumptions.
The authority required depends on the work. 14 CFR 43.3: persons authorized for maintenance addresses authorized maintenance persons, and 14 CFR 65.95: inspection authorization privileges and limitations describes inspection-authorization privileges. It is inaccurate to say that every pre-buy task always requires an IA. If the engagement also includes a required inspection or approval, ask the provider to identify the relevant authority. Do not confuse a commercial condition report with permission to return an aircraft to service. Preserve the distinction in the engagement and final package.
3. Verify identity and organize the records
Ask the reviewer to connect the aircraft identity with the installed engine, propeller and relevant equipment records. Create a chronology that distinguishes total time, time since particular work and current instrument readings. Look for unexplained changes, missing books and documents held away from the airplane. Record each material question with a page reference so the seller or shop can provide a specific answer. A tidy binder does not substitute for that reconciliation.
14 CFR 91.417: maintenance records and retention addresses record categories, retention and transfer. FAA AC 43-9D: maintenance records guidance provides advisory discussion of recordkeeping and lost-record issues. The buyer should request an understandable status review and an explicit gap list rather than treating every missing document as equally significant. Ask how any gap can be investigated and what cannot be reconstructed confidently. Keep facts, supported estimates and unknown history visibly different in the decision file.
Obtain agency-held documents where useful through FAA: requesting aircraft record copies, while recognizing that the file is not a complete replacement for owner-held logs. Ask counsel and the title or escrow professional to manage ownership and lien questions. Record review and title review serve different purposes. Use separate acceptance lines in the transaction checklist so that completion of one is not mistaken for completion of the other.
4. Confirm inspection and directive status
Have the professional identify the inspection program applicable to the aircraft and proposed operation. 14 CFR 91.409: annual, 100-hour and other inspection programs includes annual, specified 100-hour and alternative provisions; the right answer depends on the actual circumstances. Ask for the supporting entry and next relevant due basis rather than accepting a calendar notation copied from an advertisement. If an inspection will expire during the transaction, include its effect on access, movement and delivery planning.
For airworthiness directives, ask for applicability and compliance review covering the actual aircraft and installed products. The FAA's FAA: determining directive applicability and compliance explains the importance of identifying the affected model and series and reading the directive's applicability. Request the evidence for recurring status and any approved alternative used. This checklist does not perform an AD search, approve an alternative or certify compliance. Keep that work with the appointed reviewer and retain the specific supporting references.
5. Investigate events, repairs and alterations
Ask the seller for a factual description of known events and repairs, supporting entries and available photographs. Give the reviewer the same package that will be used for lender or insurer questions. The NTSB's NTSB: aviation database coverage and report status describes the coverage and development of its investigation records. A reasonable diligence inference is that no database result does not prove the absence of every past event. Use searches as evidence sources, not as a universal no-damage certificate.
Ask the professional to connect repair documentation, approval basis and current observations. The FAA's FAA: field approval process describes a pathway for specified major repairs or alterations, and FAA: supplemental type certificates explains supplemental type certificates for design changes. Neither means that every repair needs the same form or that possessing a certificate number proves a complete installation. Request the appropriate supporting documents, instructions, limitations and supplements for the actual configuration.
6. Airframe, structure, exterior and interior
Agree which airframe areas are accessible and which require further authorization. Ask about evidence of prior repair, water entry, deterioration, damage and model-specific concerns. Request location-based photographs where the provider supplies them. A clear statement about inaccessible areas belongs alongside the observations. Avoid rewriting a limited visual review as an examination of every hidden structure. If a finding warrants specialist access, obtain the scope and approval before the next stage begins.
For the interior, record condition and function questions about seats, restraints, doors, windows, ventilation, installed equipment and emergency items as applicable. Distinguish cosmetic preference from a technical discrepancy and ask the provider which findings require corrective action. Upholstery or panel appearance can affect the buyer's satisfaction without establishing the condition behind it. Budget desired cosmetic changes separately from work identified by the maintenance reviewer so that personal preferences do not obscure technical priorities.
7. Corrosion and exposure history
Ask where the aircraft has been stored and operated and what preventive work is documented. Have the reviewer identify relevant inspection locations and access limits for this model. The FAA's FAA AC 43-4B: corrosion-control guidance and scope is advisory and explains the precedence of manufacturer programs where published. Do not convert it into a universal inspection schedule or treatment recipe. Corrosion assessment and repair require the appropriate professional, instructions and evidence.
Record the precise location of each finding, the assessment basis and any need for more access. Ask how prior records relate to what is visible today. A claimed protective treatment is not proof that every underlying condition was evaluated. A coastal history is a prompt for questions, not a quantified damage estimate. The same evidence-led approach applies when an inland aircraft has spent substantial time in storage or has a reported history of water intrusion.
8. Engine evaluation without universal pass/fail numbers
Give the reviewer the installed engine identity, operating history and available maintenance records. Agree which examinations or tests the scope includes and who will perform them. Ask for interpretation using the relevant technical instructions and test conditions. 14 CFR 43.13: technical performance rules addresses the technical basis for covered maintenance work. This guide deliberately does not supply a universal compression threshold, magneto-drop limit, oil-pressure range or voltage value for every piston aircraft. The actual product and approved information govern those questions.
If compression testing, borescope examination, oil analysis or other assessments are proposed, ask what each can establish and what it cannot. Request the provider's written interpretation rather than extracting a single number from the report. Where historical results exist, ask whether they are comparable in method and context. Where no trend exists, record that limitation. A favorable observation today should not be presented as a guarantee of remaining engine life or freedom from future expense.
For example, Lycoming SI 1191A: cylinder compression describes a differential measurement against an orifice of specified size. The buyer's useful follow-up is to ask whether the equipment, test conditions and interpretation match the applicable instructions. Two handwritten readings are not automatically comparable simply because both use an eighty-point denominator. Keep the test record and the professional's explanation together. The cited instruction concerns Lycoming engines; do not transfer it to another manufacturer's product or use this explanation as directions for conducting the test.
Discuss the financial implications of identified work separately from the technical findings. Obtain a defined estimate where possible, including exclusions and availability assumptions. Keep an overhaul reserve distinct from a quoted current repair and from an unpriced concern. A buyer can plan conservatively without pretending that an hour reading alone predicts the exact timing or cost of the next major engine event.
9. Propeller, spinner and related systems
Ask the provider to reconcile the installed propeller identity with records of maintenance, overhaul, replacement and relevant instructions. Include any event history that may affect the assessment. Do not assume all propellers share the same calendar or operating-time recommendations. Request the basis applicable to the actual installation and intended operation, and ask which documentation or specialist work is needed before the buyer makes an acceptance decision.
Have the professional report observations and limitations involving the propeller, spinner and applicable control or governing systems within the authorized scope. An advertised recent overhaul should lead to a document request, not an automatic conclusion about present condition. If additional work requires removal, transport or outside services, identify those costs and scheduling effects explicitly. A vague propeller allowance can otherwise leave the buyer planning with an incomplete acquisition total.
For a reported strike or stoppage involving a Lycoming engine, Lycoming SB 533D: strike and sudden-stoppage guidance illustrates the need to check current documents: the manufacturer published revision D in February 2026 and identified changes to its event discussion and checklists. Ask the reviewer which instructions and directives apply to the installed engine and event. A repaired propeller alone does not answer every engine-history question. This example does not establish the legal status of a service bulletin for every operation or prescribe work on another engine make.
10. Fuel, oil, cooling, exhaust and induction
Discuss the provider's scope for the aircraft's fuel and engine-support systems, including relevant records, visible condition and functional questions. Ask what cannot be assessed without additional access or testing. The buyer's role is to obtain a professional evaluation and understand the limitations, not to perform improvised pressure tests or interpret stains as a complete diagnosis. Record the recommended next step and the instructions supporting any proposed work.
Treat reports of leaks, overheating, rough running or exhaust concerns as specific questions requiring professional attention. Capture when the observation occurred and who reported it. Do not accept a universal statement that all seepage is normal or that one cockpit reading clears the entire system. If the seller supplies an explanation, keep it with the reviewer's independent assessment. Where a specialist estimate remains outstanding, mark the cost unknown instead of placing a reassuring number in the budget.
11. Controls, landing gear, brakes and tires
Ask the provider which control-system, landing-gear and braking checks are appropriate and included. For retractable gear or other specialized systems, confirm relevant experience, equipment and authorized access. Request documentation of observations and any further work needed. This checklist does not provide rigging instructions, jacking procedures, tire replacement ages or generic tread-depth thresholds. Those details require the actual installation's instructions and professional evaluation.
Use a location and evidence column for each finding so that a description such as gear issue is replaced by a specific question. Ask whether an estimate includes diagnosis, access, corrective work and post-work requirements. If the shop cannot define the repair until further investigation, preserve that uncertainty in negotiations. A seller's credit should be compared with the defined scope and exclusions, not simply matched to a phrase in the report.
12. Avionics, electrical systems and the intended operation
Build an installed-equipment inventory and compare it with the advertisement and intended mission. Ask a suitable provider about installation records, functional assessment, software or database status, subscriptions, limitations and support. Distinguish equipment that is physically installed from equipment whose operation has actually been assessed. An attractive cockpit photograph does not establish configuration, legal suitability or the continuing cost of keeping every feature usable.
For applicable operations, 14 CFR 91.411: altimeter and altitude-reporting tests and 14 CFR 91.413: transponder tests address distinct test and inspection requirements. ADS-B has separate equipage and performance considerations described in the FAA's FAA: ADS-B questions and compliance resources. A Mode C transponder should not be treated as proof of ADS-B compliance. Ask the qualified provider to identify the requirements for the intended airspace and operation and the evidence available for this aircraft. Record outstanding equipment questions before assuming an avionics upgrade is merely optional.
13. Plan any ground or flight assessment professionally
If an operational assessment is proposed, agree who conducts it, the purpose, seller authorization, insurance and the conditions that must be satisfied first. Use an appropriately qualified pilot and the relevant aircraft information. This is not a flight-test card or an instruction to operate an aircraft with an unresolved discrepancy. A buyer should understand the agreed observations and limitations without directing improvised maneuvers or technical procedures from an online checklist.
When maintenance has occurred, 14 CFR 91.407: operation after maintenance or alteration addresses conditions relevant to subsequent operation, including specified circumstances requiring an operational check. Have the responsible professionals determine applicability. If flight or access is unavailable, record that fact and decide what additional evidence or contractual response is needed. Do not mark an unperformed assessment complete merely because the transaction is approaching its planned closing date.
14. Turn findings into an acquisition cash plan
Use four cost groups: agreed diligence, defined corrective work, transaction expenses and a buyer-selected ownership reserve. Keep proposed upgrades separate so that a preference for new equipment does not hide a material repair. Ask the lender what can be financed and what must be paid from buyer cash. AOPA's AOPA: what an airplane really costs discusses the distinction between ownership cost categories; the actual purchase plan should use current quotes and explicit assumptions.
For each material finding, record the evidence, proposed response, cost status, decision owner and deadline. The response may be further investigation, seller work, a negotiated credit, informed acceptance or a contractual exit. The technical professional explains condition and required work; counsel addresses remedies; the buyer decides whether the remaining commercial exposure fits the plan. A checklist supports those decisions but should never replace them with an unexplained overall score.
15. Reconcile the final delivery package
Before closing, compare the reviewed records and equipment list with the actual delivery package and any intervening changes. Obtain final reports, agreed corrective-work evidence and the relevant entries. 14 CFR 43.9: maintenance entry content addresses maintenance-record content within its scope; commercial findings and invoices remain distinct documents. Confirm that the closing team has the acceptance decisions it needs and that the lender and insurer have resolved their aircraft-specific conditions.
Arrange a handover discussion with the maintenance provider and an appropriate instructor for the ownership transition. The owner's or operator's primary maintenance responsibility is addressed in 14 CFR 91.403: owner and operator airworthiness responsibilities. Save the review's limitations and unresolved follow-up tasks, not just its favorable findings. Keep the blank review worksheet as an organizational aid alongside the actual professional reports.
Read the pre-buy cost comparison, logbook guide, damage-history guide and corrosion review guide for more detail. When ready for a financing conversation, provide the aircraft identity, purchase terms and current diligence status. That creates a concrete starting point while the appointed professionals complete the evidence and approvals needed for the actual transaction.