777 family non-routines
Boeing 777 family non-routine closure records review
This review checks that the non-routine findings raised on a Boeing 777 family aircraft were dispositioned, corrected, and closed with traceable evidence. It is run for a lessor, airline, or asset manager evaluating, transferring, or holding a specific tail. The work reads the non-routine register against defect cards, engineering dispositions, corrective-action entries, and final sign-offs, confirming each finding reached a documented close. You receive a supported exception list, a source map linking each non-routine to its disposition, and a closure plan for the serial number under review.
When this review is needed
- A 777 heavy check generated a large non-routine list and each finding has to reach a documented close.
- A structural defect was dispositioned by engineering and the approved basis has to trace to the correction.
- A redelivery cannot proceed with open non-routines and the register has to be cleared.
- A buyer wants every finding reconciled from defect to corrective sign-off before accepting the check.
The problem
Non-routines are where a check exposes the unexpected, and each finding has to travel from a defect card, through an engineering disposition, to a corrective action and a sign-off. On a widebody check the register runs long, and a finding dispositioned but never closed, or one corrected without the disposition filed behind it, leaves an open loop in the work package. Those loops are the ones diligence and auditors probe first, because they are where real damage lives.
What gets reviewed
- The non-routine register reconciled to the defect cards that generated it
- Each finding traced from defect through engineering disposition to correction
- Corrective-action entries confirmed against the disposition they implement
- Final sign-offs present for each closed non-routine
- Structural non-routines checked for an approved-data basis behind the correction
- Deferred non-routines tracked to a recorded disposition and interval
Scope this review
Tell us the asset, the event, and the evidence in scope, and we will outline a focused first engagement.
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What gets validated
- Each non-routine on the register traces to the defect card that raised it
- Every finding carries an engineering disposition where the defect required one
- Corrective-action entries match the disposition and carry a final sign-off
- Structural corrections reference the approved data they were accomplished under
- Deferred non-routines show a recorded disposition and a tracked interval
Evidence normally required
- The non-routine register for the check or event
- The defect cards and the findings they recorded
- Engineering dispositions and their approved-data references
- Corrective-action entries and final sign-offs
- Deferral records for any non-routine carried forward
Common discrepancies
- A non-routine dispositioned by engineering but never closed with a corrective sign-off
- A structural correction with no approved-data reference behind it
- A finding on the register with no defect card supporting it
- A deferred non-routine with no recorded interval or disposition
What is at stake
An open non-routine can block acceptance of a check and stall a redelivery until it is closed or formally deferred. A structural finding closed without its engineering disposition on file may have to be reopened and re-dispositioned, and a finding whose correction cannot be traced casts doubt on the condition of the aircraft the buyer is paying for.
Move from findings to resolution
Move from findings to a documented resolution path.
How the work runs
Reconcile the register
Match every non-routine to the defect card that raised it for the check or event.
Trace the disposition
Confirm each finding carries an engineering disposition where the defect required one.
Confirm the closure
Check the corrective action matches the disposition and carries a final sign-off.
List the exceptions
Flag non-routines without a documented close and sequence the closures.
What the buyer receives
- A supported exception list of non-routines that did not reach a documented close
- A source map linking each finding to its disposition and correction
- A closure plan sequencing which non-routines to close before the next milestone
Who uses the output
- Records teams clearing the non-routine register before a check is accepted
- Engineering confirming structural dispositions trace to their approved basis
- Buyers confirming no open findings remain before they accept the aircraft
How the work fits into the transaction or program
Non-routine closure is the part of a check most likely to hide open exposure, so this review runs at check exit or before a redelivery relies on the register. The exception list drives closure while the engineering and the shop that raised the findings are still reachable, and the reconciled register becomes the evidence a buyer accepts the check on.
Aircraft-specific considerations
A 777 heavy check tends to surface structural non-routines around the doors, the belly, and the wing-to-body area where a long-haul airframe accumulates fatigue and service damage, and those findings carry the heaviest engineering dispositions. The register length on a widebody means open loops hide in volume, so the reconciliation is scoped to this check's actual findings rather than a family expectation, with the structural entries traced first.
Jurisdiction-specific considerations
Engineering disposition and approved-data expectations differ between FAA and EASA practice, so a 777 whose non-routines were dispositioned under one system needs its structural corrections checked against what the receiving register will accept.
Regulatory limits
The review reconciles each non-routine to its disposition and closure evidence. It does not disposition a finding, approve a correction, or determine that the repaired aircraft is airworthy.
What this review does not cover
- Dispositioning or correcting any non-routine finding
- Approving repair or corrective data
- Any airworthiness or check-acceptance decision on the aircraft
Specific to this review
- The structural non-routines on a 777 concentrate where the long-haul airframe fatigues, so those findings carry the heaviest dispositions and the highest closure risk.
- A finding dispositioned but never closed is the most common open loop, because attention moves on once engineering has answered the defect.
- On a large non-routine register the gaps hide in volume, so reconciling the register to the defect cards surfaces more than reading cards individually.
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
What is the risk of an open non-routine at redelivery?
An open finding means the aircraft carries an unresolved defect or an undocumented correction, which can block acceptance of the check and delay the redelivery. Each non-routine is reconciled to a documented close or a recorded deferral so no open loop reaches the buyer.
Relevant glossary terms
Related pages
Where this fits
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