Defect closure
Non-routine closure records in an owner-managed aircraft file
A non-routine closure review reconstructs the register of defect cards raised during a managed aircraft's maintenance events and tests each one for the evidence that closed it: a recorded disposition, a documented corrective action, and the parts and data the fix relied on. Deferred items are followed to their final clearance. The owner representative orders the review before the aircraft or its management changes hands, and receives a register with a closure exception for every defect signed off on thin paper.
When this review is needed
- Heavy inspections generated large volumes of non-routine cards and only the routine set was archived to the owner's file.
- A pre-buy is approaching and the findings from earlier events will be walked physically against the paper.
- Deferred defects from an event years ago cannot be shown as ever having been cleared.
- Corrosion findings appear in shop reports but the closure records behind them are nowhere in the file.
The problem
Non-routine cards are where inspections find the aircraft's real problems, and their paperwork is the least standardized part of any work package. On a managed aircraft the owner learns of big-ticket findings through invoice approvals rather than documents, and the register of what was raised, deferred, and closed was never delivered as a set. Reconstructing it starts from fragments held by three different parties.
What gets reviewed
- Non-routine register reconstructed per event from work packages, shop reports, and billing detail
- Closure evidence checked card by card: disposition, corrective action, and sign-off
- Repairs arising from non-routine findings cross-referenced to their approval data
- Parts consumed against non-routine cards matched to release documents
- Deferral chains followed across events to a terminal closure
- Recurring findings such as corrosion trended across successive inspections
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
- Every non-routine card opened within a package has a closure record or a documented transfer
- Closure text states the corrective action taken rather than a bare closed status
- Findings that produced repairs connect to the repair map and the data that approved them
- Deferred items name the authorization used and show their eventual clearance
- Corrosion-related cards align with whatever corrosion-control requirements apply to the aircraft
Evidence normally required
- Work packages including their non-routine sections
- Inspection and shop-visit reports with findings summaries
- Invoices itemizing over-and-above work per event
- Deferral logs and MEL records where the operation used them
- The repair map, if the repair-approval review has already run
Common discrepancies
- More non-routine items billed on the invoice than cards present in the package
- A closure signed with the corrective-action block left blank
- A deferral chain that dead-ends when an item transfers between providers and the numbering restarts
- A corrosion finding treated once and never re-inspected despite a documented recurrence risk
What is at stake
A defect that cannot be shown as properly closed is a live question about the aircraft's condition, which is the most expensive category of doubt in any transaction. Buyers respond with physical reinspection demands, corrosion histories get disputed line by line, and items deferred long ago resurface as open airworthiness questions at the worst possible moment.
Move from findings to resolution
Move from findings to a documented resolution path.
How the work runs
Reconstruct the population
Pull non-routine cards, findings summaries, and billing detail together to establish what was actually raised at each event.
Match closures to evidence
Check disposition, corrective action, parts, and data card by card, and mark what fails.
Walk the deferral chains
Follow every carried item across events until it terminates in a clearance or an open end.
Report the register
Deliver the consolidated register, closure exceptions, and the open condition questions they imply.
What the buyer receives
- A consolidated non-routine register spanning the ownership's maintenance events
- A closure exception list stating exactly which evidence fails for each card
- A deferral-chain report showing the terminal status of every carried item
Who uses the output
- The owner representative anticipating what a pre-buy will find
- The incoming provider judging condition history before it quotes for the aircraft
- Buyer technical teams reconciling paper findings against the physical survey
How the work fits into the transaction or program
This check pairs naturally with the task-card review because both open the same work packages, and repairs raised by non-routine findings flow onward into the repair-approval review. Running it before the physical pre-buy keeps paper questions from masquerading as condition questions on the inspection floor.
Jurisdiction-specific considerations
FAA guidance treats discrepancy records as maintenance records that must describe the work, the date, and who signed it, and AC 43-9C spells out that expectation. EASA-managed aircraft carry worksheets and defect rectification records under continuing-airworthiness rules with defined retention. In neither regime does an invoice line satisfy the description-of-work standard, so billing detail supports reconstruction without ever substituting for it.
Regulatory limits
The review makes no determination that a defect was correctly rectified, approves no deferral, and clears no repair data. It reports whether the closure evidence exists and hangs together. Judgments about the adequacy of the rectification stay with certifying personnel and the responsible authority.
What this review does not cover
- Physical inspection of previously repaired or dispositioned areas
- Adjudicating warranty responsibility for past findings
- Reopening closed maintenance events with the providers that performed them
Specific to this review
- Invoice line counts are a fast integrity test: over-and-above billing implies non-routine cards, and a mismatch against the package is the earliest reliable warning that records were thinned.
- Deferral chains break most often at event boundaries, where an item leaves one provider's system and enters the next one's intake under a new number.
- Corrosion history is the part of the non-routine record that buyers of older business aircraft read line by line.
- Closure quality tracks the shop's air-carrier exposure; providers serving mostly private clients tend to write thinner dispositions.
- A register rebuilt from three independent sources, packages, reports, and billing, is defensible; one rebuilt from invoices alone is only a hypothesis.
Sources
U.S. Government (eCFR). Maintenance recordkeeping content and approval-for-return-to-service requirements, including 43.9, 43.11, and Appendix B.
Federal Aviation Administration. FAA guidance on making and keeping maintenance records and acceptable recordkeeping practices.
European Union / EASA. Continuing airworthiness, maintenance records, CAMO responsibilities, and the airworthiness review process in the EASA system.
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.
Frequently asked questions
The shop treats its non-routine detail as internal working paper. What then?
Retention and delivery turn on the work-order terms, but most shops will extract or certify closure evidence for a live transaction when asked precisely. The review names which cards need that request and exactly what to ask for, which is usually the difference between a quick extract and a refusal.
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.
Talk through the aircraft, records, evidence, deadline, and next useful step.