Shop-visit evidence gap
Missing shop-visit evidence for engines and components
Missing shop-visit evidence means an engine, APU, or landing-gear overhaul is recorded as accomplished while the package that documents the work, the build, and the release is absent from the records. It affects lessors, airlines, and MROs before a sale, a return, or an engine lease. The check reconciles each shop event against its workscope, teardown and build records, life-limited part disposition, and release. You receive a list of events with thin or missing evidence and the path to recover each package.
When this review is needed
- An engine is being sold or leased and the last shop visit is logged but the workscope and build package cannot be found.
- A return condition references the most recent overhaul and the records show only a one-line entry for it.
- A landing-gear or APU overhaul is recorded with a date but without the disposition and release behind it.
- A shop visit changed life-limited parts and the dispositions that justify the new status list are absent.
The problem
A shop visit is the most expensive event in an asset's life, yet it can appear in the records as a single logbook line naming a date and a facility. The workscope, the teardown findings, the parts replaced, the life-limited part dispositions, and the release that ties the rebuilt unit to the aircraft are often held by the shop rather than passed to the owner. Without that package, the build the status list claims cannot be confirmed, and the value the visit added cannot be proven.
What gets reviewed
- Each engine, APU, and landing-gear shop visit recorded in the asset's history
- The workscope that defined the visit and what it was meant to accomplish
- Teardown findings, build records, and the parts replaced at the event
- Life-limited part dispositions made at the visit and their effect on the status list
- The release certificate tying the rebuilt unit back to the aircraft
- Trend or test-cell data where the visit was performance-driven
Scope this review
Tell us the asset, the event, and the evidence in scope, and we will outline a focused first engagement.
Send a representative, redacted record set and we will scope the review.
What gets validated
- Each recorded shop visit has a workscope and build package present in the records
- Teardown and build records account for the parts the status list shows as changed
- Life-limited part dispositions at the visit reconcile with the post-visit status list
- The release certificate for the rebuilt unit names the correct serial number and configuration
- Test-cell or trend data is present where the visit was a performance restoration
- The logbook entry for the visit reconciles with the package behind it
Evidence normally required
- Engine, APU, and landing-gear logbooks or their digital equivalents
- Shop-visit reports, workscopes, and build records where available
- Life-limited part status lists before and after each visit
- Release certificates for the rebuilt units
- Test-cell, trend, or borescope data tied to the visit
Common discrepancies
- A shop visit recorded as a single logbook line with no package behind it
- A build record that does not account for parts the status list shows as replaced
- Life-limited part dispositions absent for an event that reset the status list
- A release certificate for the rebuilt unit that names a different serial number
- An overhaul whose package the facility no longer holds or cannot locate
What is at stake
An overhaul with no supporting package may be treated as not having happened for valuation, which strips the asset of the life the visit was supposed to add. A buyer or lessor cannot price a build it cannot see, and reconstructing a shop package after the fact depends on the facility still holding the records, which is far from certain on an older event.
Move from findings to resolution
Sequence the fixes and the documentation that closes each finding.
How the work runs
Inventory the visits
List every engine, APU, and landing-gear shop visit in the asset history with the date, facility, and recorded scope.
Match package to event
Locate the workscope, build records, dispositions, and release for each visit and confirm they reconcile.
Rank the gaps
Register events with thin or missing evidence and rank them by the build value the records cannot support.
Map recovery
Recommend a recovery path per event, from the facility, a prior owner, or a duplicate release, before the asset moves.
What the buyer receives
- A register of shop visits with thin or missing evidence, ranked by value at risk
- The recovery path for each event, whether a package from the facility or a duplicate release
- A reconciled view of which build claims the records currently support
Who uses the output
- Asset and acquisition teams pricing the build into an engine or aircraft
- Records teams recovering packages from facilities before a transaction closes
- Continuing-airworthiness staff confirming the post-visit status against source evidence
How the work fits into the transaction or program
The review targets the shop-visit packages specifically, separating events that lack only paperwork from those whose build cannot be confirmed at all. It feeds the engine status and the discrepancy register, and it underpins the life-limited part trace, since a missing disposition breaks both the build and the chain.
Aircraft-specific considerations
What a shop visit must evidence differs by engine and component type. The module structure, the typical workscope, and the life-limited part set change which records are decisive, so the review is scoped to the specific engine or component rather than applied to every visit identically.
Regulatory limits
The review confirms whether shop-visit evidence is present and consistent with the recorded build. It does not re-certify a rebuilt unit, perform inspection or test, make an airworthiness determination, or guarantee a facility can produce a missing package.
What this review does not cover
- Physical inspection, borescope, or test of the engine or component
- Re-certification or re-build of any unit
- Any airworthiness determination or regulatory approval
Specific to this review
- A shop visit is often the single most valuable event in an asset's history yet appears in the records as one logbook line.
- Recovery depends on the facility still holding the package, which becomes unlikely as an event ages, so older visits are the hardest to support.
- A missing disposition sheet breaks the build record and the life-limited part chain at the same time, so the two reviews are run together.
- An unsupported overhaul is treated as not adding life for valuation, which is why the gap is ranked by value at risk rather than by count.
Sources
U.S. Government (eCFR). Records an owner or operator must keep, including total time in service, current status of life-limited parts, and AD compliance.
Federal Aviation Administration. Completion and use of FAA Form 8130-3, Authorized Release Certificate, for new and used parts.
European Union Aviation Safety Agency. EASA authorised release certificate for components, equivalent in function to FAA Form 8130-3.
U.S. Government (eCFR). Maintenance recordkeeping content and approval-for-return-to-service requirements, including 43.9, 43.11, and Appendix B.
European Union / EASA. Continuing airworthiness, maintenance records, CAMO responsibilities, and the airworthiness review process in the EASA system.
Frequently asked questions
Can a missing shop-visit package be recovered?
Often, if the facility still holds it. Shops retain workscopes and build records for a period, so a recent visit is usually recoverable. Older events depend on the shop's retention and whether the prior owner kept a copy.
What if only the release is missing but the build records are present?
That is a narrower gap. The build can be confirmed from the package while the release is recovered separately. The review separates the two so each is chased on the right path.
Relevant glossary terms
Related pages
Where this fits
Talk to an engineer who has done this work
We will walk through your current state, the records or evidence involved, and a scoped first engagement.
Walk through your situation with an engineer who has done this work.