Aircraft Appraisal: Process, Cost, and Report Checklist

Appraisal, valuation, price, and inspection are different

An appraiser is not automatically the inspecting mechanic, title lawyer, tax adviser, or records auditor. Coordinate those specialties, but preserve their separate responsibilities.

Start with intended use and value premise

The same aircraft can support different conclusions when the question changes. Acquisition, financing, insurance, financial reporting, tax, litigation, portfolio monitoring, orderly sale, and liquidation assignments may apply different definitions, assumptions, and evidence standards.

The engagement letter should state:

• Client and authorized users of the report.
• Intended use and any use restrictions.
• Exact asset identity, including engines and other material components.
• Effective date and report date.
• Applicable definition or premise of value.
• Desktop or inspected scope.
• Jurisdiction, currency, location, and delivery assumptions.
• Required professional standard or client policy.
• Extraordinary assumptions, hypothetical conditions, and exclusions.
• Deliverables, timing, fee, and conflict disclosures.

Do not order “an appraisal for closing” and leave the appraiser to infer what the lender, insurer, or auditor will accept.

Match the appraiser to the assignment

Credentials are one part of qualification. Relevant asset experience, independence, methodology, market access, and report acceptance also matter.

Ask a prospective appraiser:

1. Which aircraft categories and markets do you regularly value?
2. What professional standards and ethics rules govern the assignment?
3. Have you valued this model, engine type, and mission segment?
4. Will any broker, seller, buyer, lender, or maintenance relationship create a conflict?
5. Who will inspect, research, analyze, and sign the report?
6. Which data sources and transaction evidence can be used?
7. Will the intended user accept the appraiser and report format?

The ISTAT Appraisers Program establishes qualifications and ethical requirements for its certified transport-aircraft appraisers. In the United States, the Uniform Standards of Professional Appraisal Practice cover personal-property appraisal among other disciplines; whether USPAP or another standard governs a particular aircraft assignment depends on the engagement, intended use, client requirements, and applicable law or policy. Other aircraft categories and intended uses may call for a different recognized qualification. The person relying on the report should confirm acceptance before work starts.

Build the appraisal evidence package

The conclusion can only be as specific as the evidence. Provide a controlled package rather than a marketing specification.

Do not silently fill a gap with the most favorable assumption. Mark the fact as unverified, request support, and ask the appraiser how the uncertainty will be treated. Radar’s aircraft pre-buy records review explains how to build that source package.

Understand the main appraisal approaches

Sales comparison

The appraiser selects relevant transactions and market observations, then adjusts for differences between each comparable and the subject. Model, vintage, hours, engine status, programs, inspection exposure, configuration, condition, records, location, and timing can all matter.

Listings show supply and seller expectations; they are not automatically completed-sale evidence. A credible report explains why a comparable belongs in the set and which adjustments are supported.

Cost approach

Cost may be informative for a new or specialized asset when replacement economics can be established. Depreciation, obsolescence, availability, certification, and lead time complicate the bridge from replacement cost to market value.

Income approach

An income approach may be relevant when the asset is valued through attributable cash flow, lease economics, or another income-producing premise. It is sensitive to utilization, rate, cost, residual, discount-rate, and marketability assumptions. It should not be added mechanically when the data does not support it.

The report should reconcile the approaches rather than averaging incompatible answers.

Treat maintenance status as evidence, not shorthand

“Fresh engines,” “on program,” and “current on maintenance” are starting claims. The appraisal file should support:

• Exact hours, cycles, and calendar exposure.
• Remaining life for controlled parts.
• Last and next material inspections.
• Known shop findings and open discrepancies.
• Contract coverage, exclusions, payment standing, and transfer terms.
• Expected downtime and location of future work.
• Airworthiness Directive, repair, alteration, and configuration status.

A market may not price future maintenance dollar for dollar. The appraiser should explain whether an adjustment comes from observed transactions, estimated economic exposure, market convention, or professional judgment.

Decide whether physical inspection is necessary

A physical inspection can test identity, installed configuration, apparent condition, records-to-aircraft consistency, paint and interior condition, and visible evidence of damage or repair. Its depth depends on the agreed scope.

An appraisal inspection generally does not establish airworthiness, hidden condition, or complete conformity. If the purchase decision depends on those questions, separately engage appropriately certificated maintenance and technical specialists. Align the appraisal effective date with the inspection and records cut-off so later utilization or maintenance does not slip between them.

What a decision-grade appraisal report contains

Use this anatomy to review the deliverable:

• Assignment, client, intended use, intended users, and restrictions.
• Asset identity and property interests appraised.
• Effective date, inspection date, and report date.
• Definition and premise of value.
• Scope of work and standards followed.
• Appraiser qualifications, independence, and disclosures.
• Aircraft, engine, APU, configuration, maintenance, and condition facts.
• Information sources and verification performed.
• Market context and comparable evidence.
• Adjustment logic and valuation approaches.
• Reconciliation and concluded value or range.
• Assumptions, limiting conditions, and unresolved exceptions.
• Signed certification or attestation where required by the governing standard or engagement.

The report should be transparent enough for an intended user or qualified reviewer to follow the evidence path, even if that reviewer would exercise different judgment.

Appraisal review checklist

Before relying on the report, confirm:

• [ ] Serial numbers and property interests match the transaction.
• [ ] The effective date and value premise match the decision.
• [ ] Intended users are allowed to rely on the report.
• [ ] Inspection scope is explicit.
• [ ] Engine, APU, program, and maintenance facts match source records.
• [ ] Listings are distinguished from verified transactions.
• [ ] Comparable selection and adjustments are explained.
• [ ] Material unknowns appear as limitations or sensitivity, not hidden assumptions.
• [ ] Currency, location, taxes, delivery condition, and timing are stated.
• [ ] The appraiser’s qualification and independence are documented.
• [ ] The lender, insurer, auditor, court, or tax adviser has accepted the form required.

For an acquisition, reconcile the appraisal with the aircraft valuation guide, records findings, inspection report, title work, and purchase agreement. A value conclusion should never erase a technical exception.

Common appraisal failure modes

Reject or clarify a report when the wrong serial number was used, the market date is stale, maintenance status came from an advertisement, program coverage was assumed, comparables are materially different without adjustment, damage was omitted, or a single point value implies unsupported precision.

Also challenge circular evidence: three listings copied from the same source are not three independent transactions. Preserve the original data date and source so later reviewers can see what the appraiser knew.

Sources and further reading

• ISTAT Appraisers Program and governing handbook
• The Appraisal Foundation, Uniform Standards of Professional Appraisal Practice
• The Appraisal Foundation, Uniform Standards of Professional Appraisal Practice
• 14 CFR 91.417, Maintenance records
• NBAA Aircraft Transactions Guide