Fewer jets, bigger stakes: every pre-purchase inspection is a certificate problem

A pre-purchase inspection is not only physical. For a buyer, it is also a documentary audit of the aircraft's airworthiness records. Global Jet Capital's Q2 2026 Market Brief describes a market where the value riding on that audit keeps climbing. This article leaves the market analysis to others. It looks at what the data means for the people who open the logbooks: buyers, counsel, lenders, and the maintenance organizations running due diligence.

What the Q2 2026 data means for due diligence

The numbers, all from the Global Jet Capital Q2 2026 Market Brief published on August 18, 2026:

• Fewer deals, more money per deal. Year-to-date pre-owned transaction unit volume was down 7.5 percent, but dollar volume was up 7 percent year over year. Global Jet Capital attributes the divergence to stable aircraft values and strong demand for heavy jets.
• The decline is partly statistical. Q1 2025 pre-owned unit volume rose 37.4 percent as buyers accelerated deals ahead of anticipated U.S. tariffs, so Q1 2026 fell 18 percent against that inflated base. On the normalized Q2 comparison, transactions rose 3.7 percent. Global Jet Capital also notes that a significant proportion of the decline may reflect reporting delays, and expects final 2026 data to move toward historical trends.
• New aircraft are not relieving the pressure — but read the delivery data carefully. OEM backlogs reached $66.8 billion, up 20.4 percent year over year. The brief reports two different delivery measures. In transaction data, new-delivery unit volume fell 19.8 percent in the first half — a provisional figure Global Jet Capital expects to be revised as reporting catches up. Yet deliveries reported by the five main OEMs rose 4.5 percent over the same period, with aggregate Q2 deliveries nearly even with Q2 2025. What keeps buyers in the pre-owned market is less a delivery decline than the wait: lead times of 18 to 26 months on average at the major manufacturers, longer for some models.
• Demand signals are up. Business jet departures rose 3.4 percent in the first half, and average bluebook values increased 2.9 percent year over year in Q2, per the brief as republished by NAFA. GlobalAir's analysis adds that availability tightened to 6.6 percent of the fleet, with listings of aircraft aged 12 years and younger shrinking.

The calendar may add pressure, but one quarter does not establish a seasonal cause. Q4 2025 transaction dollar volume rose 19.3 percent year over year. If 2026 repeats that activity, due-diligence teams will face a concentrated workload on high-value aircraft; the brief does not attribute the 2025 rise to tax or budget timing.

Why every pre-purchase is a certificate problem

The regulatory structure makes the sale itself a documentary handover. Under 14 CFR 91.417, the owner must keep records of total time in service, life-limited-part status, time since overhaul, inspection status, and every applicable airworthiness directive. And under 91.417(b)(2), those records "shall be retained and transferred with the aircraft at the time the aircraft is sold." The buyer does not just buy metal. The buyer inherits a documentary position, defects included.

What the audit actually verifies, line by line:

• Logbooks. Every entry approving the aircraft for return to service must carry a description of the work, a completion date, and a signature with a certificate number (91.417(a)(1)). As the Radisson case showed, a certificate number on paper proves existence, not living validity.
• Airworthiness directives. For each AD: the number, revision date, method of compliance, and the next due date for recurring actions (91.417(a)(2)(v)). An undocumented AD means compliance is not demonstrated — unproven, not automatically unairworthy — and resolving it becomes a condition of pricing the aircraft.
• Life-limited parts. The current status of every life-limited part (91.417(a)(2)(ii)). Note the precision: the FAA does not require back-to-birth records for every life-limited part. In its 2009 Chief Counsel interpretation, the agency states that an audit trail to the part's origin is required only when other records cannot establish the part's status with sufficient certainty — "the exception rather than the norm". In a high-value sale, expect the buyer's side to demand that trace anyway: what is legally sufficient and what closes a deal are two different bars.
• Alterations. FAA Form 337 for each major alteration (91.417(a)(2)(vi)), plus the STC data packages behind them. An interior or avionics upgrade without its data is an airworthiness and financing problem, not a selling point.
• Release certificates. FAA Form 8130-3 or EASA Form 1 for installed parts — the document the AOG Technics scandal proved can be forged at industrial scale, and which must be verified with its issuer, not just read.

This is where the Q2 data bites. Heavy jets are the segment the brief credits with strong demand behind the resilient dollar volume. A heavy-jet file can combine engines and an APU with serialized life-limited parts, accumulated airworthiness directives, and bespoke interiors supported by STCs. That does not prove a fixed relationship between price and page count; it explains why a high-value transaction can carry a broad verification surface. Lenders may also run their own records review, making documentary gaps a financing risk as well as a maintenance risk.

A checklist for the records side of due diligence

You are the buyer's maintenance lead, counsel, or lender. These checks are pass-or-quarantine.

1. Inventory the records before the physical inspection. Missing logbooks are not a defect to negotiate around; they reprice or kill the deal. The records transfer with the aircraft at sale — if they do not exist at closing, re-creating them is slow, costly, and sometimes impossible.
2. Rebuild the AD status independently. Do not accept the seller's summary. For each applicable AD, confirm the number, revision, method of compliance, and next due date against the published directive.
3. Establish the life status of every life-limited part. The regulatory bar is a record that shows the part's current status with sufficient certainty. Where the records leave doubt, the audit trail back to the part's origin becomes the only way to demonstrate status — and in a sale, expect the buyer's side to ask for it even when the FAA would not. A part whose status cannot be substantiated gets priced as a risk, up to re-certification or replacement.
4. Verify release certificates with their issuers. An 8130-3 or EASA Form 1 you have only read is an unverified claim. Contact the issuing organization — the AOG Technics files showed how convincing a forged one can look.
5. Re-run the validity chain behind every signature. Certificate number lookups in the FAA Airmen Registry confirm existence; currency and identity need the checks we detailed in the dead-mechanic case.
6. Match every alteration to its data. Form 337 copies and STC data packages, cross-checked against the physical configuration. An upgrade you cannot document is a liability you are buying.
7. Anchor what you verified. A hash-anchored record of the audit's findings keeps the proof intact through closing, financing, and the next sale.

The limits of what this proves

Three limits keep this analysis honest.

• The market data is preliminary. Global Jet Capital itself flags reporting delays and expects 2026 figures to be revised upward. The workload argument does not depend on the exact percentage — but the percentages you quote will age, and this article dates them.
• A records audit is not a physical inspection. Clean documents do not prove a healthy aircraft, and this article says nothing about borescopes, corrosion, or systems checks. The two audits run in parallel, and both can kill a deal.
• Anchoring fixes alteration, not history. A hash anchored today proves non-alteration from today. It cannot retroactively prove that a 2019 logbook entry was true when written — that judgment still belongs to the auditor.

AeroCert's take

AeroCert's take: business aviation is learning what parts trading learned from AOG Technics — the certificate is the asset's shadow, and the shadow sets the price. In a market of fewer, richer, heavier deals, the records audit is where value is confirmed or destroyed. Repeated issuer-confirmation calls can add delay to a closing. Anchoring a certificate's SHA-256 hash at issuance lets a buyer's team compare a presented document with the issued record without repeating that call, even years later. The proof is only as strong as the identity behind it. The anchor is tied to an authenticated issuer: verification confirms that a registered, identified organization issued that exact document. An anonymous upload anchors nothing worth trusting. It does not replace the audit; it makes one verification step repeatable and durable. See how AeroCert works, or integrate verification into your own systems with the developer platform.

Sources

Primary sources:

• Global Jet Capital, Q2 2026 Market Brief, published August 18, 2026: pre-owned YTD unit volume down 7.5 percent and dollar volume up 7 percent year over year; the Q1 2025 tariff-driven base effect (+37.4 percent, then Q1 2026 down 18 percent) and the +3.7 percent Q2 2026 comparison; the two delivery measures — provisional transaction data showing new-delivery unit volume down 19.8 percent (dollar volume down 14.5 percent) versus deliveries reported by the five main OEMs up 4.5 percent in H1 with aggregate Q2 deliveries nearly even with Q2 2025; lead times of 18 to 26 months on average at the major manufacturers; Q4 2025 dollar volume up 19.3 percent; reporting-delay caveat.
• 14 CFR 91.417: maintenance records requirements — content of records, AD and life-limited-part status, Form 337 copies, and the duty to retain and transfer records with the aircraft at sale (paragraph (b)(2)).
• FAA Office of the Chief Counsel, legal interpretation to Phoenix Heliparts, "Determining Life Status of Life-Limited Parts", July 18, 2009: the regulations do not require back-to-birth records to determine the life status of life-limited parts; quoting the 1992 Heflin interpretation, an audit trail to the part's origin is required only when records are so incomplete that an accurate determination cannot be made — "the exception rather than the norm".
• FAA Airmen Registry online inquiry: the official channel to confirm a certificate number exists.

Secondary sources (republication and analysis, not primary evidence):

• NAFA republication of the Global Jet Capital release, August 19, 2026 — a verbatim republication of the release, not an independent source; used here to confirm the release's figures: business jet departures up 3.4 percent in H1 2026; OEM backlogs up 20.4 percent year over year to $66.8 billion; bluebook values up 2.9 percent; GDP growth of 2.3 percent in Q2.
• GlobalAir.com, August 19, 2026: availability down to 6.6 percent of the fleet in Q2 from 7.3 percent a year earlier, listings up 3.3 percent driven by older aircraft, and tightening inventory in the 12-years-and-younger segment.