Dash 8 non-routines
De Havilland Dash 8 non-routine closure records review
This review follows the non-routine cards raised on a De Havilland Dash 8 during checks and confirms each finding was dispositioned, corrected, and closed with evidence. It reads the defect cards, the engineering dispositions, the corrective-action entries, and the final sign-offs together, checking that nothing was raised and left open. A records specialist runs it before a transaction or a check exit where open findings would carry into service. You receive a supported exception list, a source map from each defect to its closure, and a closure plan for the non-routines that were never resolved.
When this review is needed
- A Dash 8 is leaving a heavy check and the non-routine register has to show every finding closed.
- A buyer wants confirmation that check findings did not carry into service open.
- A defect was dispositioned by engineering and the corrective action has to be tied to it.
- Non-routines were raised at a line station and their closure discipline needs confirming.
The problem
Non-routines are where a check finds what the routine cards did not, and they are the easiest records to leave loose. On a Dash 8 that has been through corrosion-driven inspections, defect cards get raised in volume, each needs an engineering disposition, a corrective action, and a final sign-off, and the register that should tie them together often does not. A defect raised and dispositioned but never closed, or a corrective action with no sign-off, is a finding that quietly carried into service.
What gets reviewed
- Each non-routine card matched from finding through disposition to closure
- Engineering dispositions tied to the defect they resolve
- Corrective-action entries reconciled to their disposition
- Final sign-offs confirming each non-routine was closed
- The non-routine register reconciled to the cards actually raised
- Findings that generated a repair or alteration linked to that record
Scope this review
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What gets validated
- Every non-routine raised traces to a disposition and a recorded closure
- Each engineering disposition corresponds to a defect actually raised
- Corrective actions reconcile with the dispositions that called for them
- Each closed non-routine carries the final sign-off that resolves it
- The register accounts for every card raised during the check
Evidence normally required
- The non-routine register for the check or work package
- The defect cards raised during the check
- Engineering dispositions issued against the findings
- Corrective-action entries and their final sign-offs
- Any repair or alteration records generated by a non-routine
Common discrepancies
- A defect card dispositioned but with no recorded closure
- An engineering disposition with no matching corrective action
- A non-routine on the register with no card behind it
- A finding that generated a repair with no link back to the record
What is at stake
An open non-routine that was never closed means a known defect went back into service without recorded resolution, which a buyer and an auditor both treat as a serious finding. A disposition without a matching corrective action leaves the airframe's condition unclear, and reconstructing what happened to a loose non-routine after the check is often impossible.
Move from findings to resolution
Move from findings to a documented resolution path.
How the work runs
Reconcile the register
Match the non-routine register against the defect cards actually raised in the check.
Follow each finding
Trace every defect from its disposition through its corrective action.
Confirm the closures
Verify each non-routine carries the final sign-off that resolves it.
Flag the open items
Record findings left open or unresolved and the evidence needed to close them.
What the buyer receives
- A supported exception list of open and unresolved non-routines
- A source map from each defect through disposition to closure
- A closure plan for resolving or documenting the loose findings
Who uses the output
- Continuing-airworthiness teams confirming no finding carried into service open
- Records teams reconciling the register to the cards raised
- Buyers verifying that check findings were closed with evidence
How the work fits into the transaction or program
Non-routine verification pairs with the task-card review, since routines record planned work and non-routines record what the check found. Its exception list drives closure of loose findings before the check exit is relied on, and any finding that generated a repair feeds the repair-approval evidence.
Aircraft-specific considerations
Dash 8 corrosion inspections on coastal routes generate a high volume of non-routines, so the register is longer than on a lower-exposure asset and reconciling it is where the effort concentrates. Structural findings on this family often produce a repair, so the non-routine record and the repair-approval record have to link cleanly for the finding to read as closed.
Jurisdiction-specific considerations
FAA and EASA differ on how a finding's disposition and closure are recorded, so a Dash 8 non-routine set has to satisfy whichever system the receiving operator uses. The review notes where closure discipline will need to be demonstrated against the receiving authority.
Regulatory limits
The review confirms non-routine findings were dispositioned and closed with evidence. It does not disposition any finding, perform the corrective action, or make an airworthiness determination on the resolution.
What this review does not cover
- Dispositioning any finding or performing its corrective action
- Signing off or closing any non-routine card
- Any airworthiness determination on the resolved findings
Specific to this review
- Non-routines are the loosest records in a check, because each one is raised on the spot and relies on a register that is easy to leave incomplete.
- A disposition without a closure means a known defect went into service unresolved on the record, which is a more serious finding than a routine gap.
- On a corrosion-prone Dash 8 the non-routine volume is high, so a card raised but never registered is a common and easily missed gap.
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
How is this different from reviewing the routine task cards?
Routine cards record the planned work; non-routines record what the check discovered along the way. They are raised on the spot and closed individually, so they are far easier to leave loose. This review reconciles the register to the cards raised and confirms each finding was dispositioned, corrected, and signed off, which is where open items most often hide.
Relevant glossary terms
Related pages
Where this fits
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