Repair and alteration record review for managed aircraft heading into a transaction

When this review is needed

• The owner has decided to sell and a pre-buy inspection with full records review is part of every credible offer.
• The repair map or dent-and-buckle chart has not been reconciled to the repair files since before the current management engagement.
• Known damage events during the ownership period were handled by different shops and the substantiation quality varies.
• A refinancing or insurance renewal is asking pointed questions about structural repair history.

The problem

Repairs are the one record set a buyer can check against physical reality, because the inspector on the pre-buy walks the airframe with the repair map in hand. Managed aircraft accumulate repairs under multiple shops, owners, and managers, and the paperwork standard varies with each custodian. A doubler that every mechanic can see becomes a crisis when the file behind it holds a work order but no approved data, or a Form 337 that describes a different location than the metal shows.

What gets reviewed

• The repair map or dent-and-buckle chart reconciled against every repair and alteration file in the records
• Each repair matched to its approved data: SRM chapter and figure, DER-approved data under FAA Form 8110-3, STC, or authority-approved equivalent
• Major versus minor classification reviewed, with FAA Form 337 filings located for majors on an FAA-registered history
• Damage reports and disposition records paired with the repairs they led to
• Return-to-service entries verified for each repair event
• Alterations cross-checked against the modification status so nothing embodied is missing from either record

What gets validated

• Every entry on the repair map corresponds to a repair file containing damage description, disposition, data reference, and sign-off
• Approved data cited in each file actually covers the repair as described, including location, extent, and material
• Majors on the FAA side have a Form 337 whose description matches the repair file and the map location
• Repairs performed outside SRM limits carry engineering approval rather than a bare SRM citation
• No repair file exists without a corresponding map entry, since an unmapped documented repair signals the map is incomplete

Evidence normally required

• The current repair map or dent-and-buckle chart
• Repair and alteration files, including damage reports and dispositions
• Form 337 filings and DER or authority approval documents
• Airframe logbooks covering the repair events
• The modification status list for cross-checking alterations

Common discrepancies

• A visible, mapped repair whose file contains workmanship records but no approved data reference
• A repair described as within SRM limits where the recorded dimensions sit outside the cited SRM figure
• Form 337 absent for a repair that the file itself classifies as major
• Repairs documented in shop paperwork that never made it onto the repair map at all

What is at stake

An unsubstantiated repair discovered at pre-buy reads as concealment even when it is merely poor filing, and buyers respond with price reductions sized for worst-case rectification. Negotiations stall while the manager scrambles for decades-old engineering data, and the owner learns mid-deal that the aircraft's history is weaker than the management reports suggested. Some deals do not survive that discovery.

How the work runs

What the buyer receives

• A repair-by-repair substantiation register grading each chain from complete to undocumented
• A reconciled repair map annotated with the file reference behind every entry
• A cure plan identifying which shop, engineer, or archive can supply each missing element before the pre-buy

Who uses the output

• The management team preparing the aircraft and its records for market
• The owner representative calibrating price expectations and disclosure strategy
• Brokers and counsel handling repair-related representations in the purchase agreement

How the work fits into the transaction or program

Because the pre-buy inspection physically verifies this record set, repair substantiation belongs at the front of sale preparation, before photography, marketing, and data-room assembly. Findings feed the cure effort and the disclosure schedule, and the reconciled map gives the buyer's inspector a document that matches the airframe, which sets the tone for the rest of the review.

Jurisdiction-specific considerations

Substantiation customs differ by regime: an FAA history leans on Form 337 filings and DER-approved data, while an EASA history documents repairs through approved data under Part-21 and release under Part-145. Aircraft that changed registries mid-life often hold repairs approved under a regime the current registry's reviewers read less fluently, so the review states each repair's approval basis in both vocabularies.

Regulatory limits

This review evaluates documentation against the records standards a transaction applies. It does not approve repairs, classify damage, generate engineering data, or determine that any repair is airworthy; those judgments rest with approved organizations and the responsible authority.

What this review does not cover

• Physical inspection, mapping, or nondestructive testing of the airframe
• Commissioning new engineering approvals for repairs that lack them
• Negotiating repair-related price adjustments with the buyer

Specific to this review

• Repair records are uniquely exposed at transactions because they are checked against metal, while most other record sets are only checked against other records.
• A documented repair missing from the map damages credibility more than a mapped repair with a thin file, because it suggests the map cannot be relied on as an index.
• Approved-data recovery is slow in proportion to the age of the repair: shops close, DER files retire with the engineer, and a decades-old approval may be genuinely unrecoverable.
• Buyers of managed business aircraft often assume professional management implies clean repair files, and the disappointment premium when it does not is priced accordingly.

Sources

Frequently asked questions

Relevant glossary terms

Related pages

Where this fits