737NG findings closure
Boeing 737NG non-routine card records review
A 737NG non-routine records review confirms that the defects raised during a check were each dispositioned, corrected against approved data, and signed to a close. It is for teams checking that a Boeing 737NG check did not leave findings hanging before they rely on the package. The review works the non-routine register card by card, following each finding from the routine task that raised it through the engineering disposition and the final sign-off. You receive an exception list of unclosed or unsupported non-routines, a source map to the data used to correct them, and a plan to close what remains.
When this review is needed
- A 737NG heavy check produced a large non-routine register and someone must prove each item closed.
- A finding was corrected by a repair and the approval data behind it needs to be in the file.
- A check was accepted with open non-routines that now block a sale or re-lease.
- A structural finding was deferred to a later check and the deferral basis has to be traced.
The problem
Non-routines are where a 737NG check gets interesting, because each defect is a small investigation with its own disposition and its own data. A finding can be closed on paper while the approved data that justified the repair never made it into the pack, or the disposition text references a drawing or SRM figure that is missing. Under check exit pressure, some non-routines get deferred and the deferral quietly loses its expiry, and others are signed closed without the corrective step actually recorded.
What gets reviewed
- Each non-routine traced back to the routine task or inspection that raised it
- The engineering disposition recorded for every finding, including repair, replace, or defer
- Approved data supporting each corrective action, whether SRM, drawing, or repair approval
- Final corrective-action entries and sign-offs closing each non-routine
- Deferred findings carried to a later check with their basis and expiry
- Structural and repeat findings flagged for their inspection or life consequences
Scope this review
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What gets validated
- Every non-routine in the register traces to the card or inspection that originated it
- Each finding carries a recorded disposition rather than a bare closed status
- The approved data cited by each repair disposition is present and applicable to the finding
- The corrective action and final sign-off are recorded for each closed non-routine
- Every deferred non-routine states its basis and an expiry that has not silently lapsed
Evidence normally required
- The complete non-routine register from the check with all card numbers
- Engineering dispositions and repair schemes issued during the check
- The approved data cited by each corrective action, including SRM and repair approvals
- The routine card set that raised the findings, for cross-reference
- The deferral register showing items carried to a later check
Common discrepancies
- A non-routine marked closed with no approved data behind the repair it describes
- A disposition that cites an SRM figure or drawing absent from the delivered pack
- A deferred structural finding whose expiry lapsed without a recorded extension
- A closed status with no corrective-action entry showing what was actually done
What is at stake
A non-routine that closed without its supporting data is an unproven repair, and a structural one carries an ongoing inspection or life implication the new owner inherits blind. Deferred findings that lost their basis become open liabilities that a buyer discounts hard or refuses. Left in place, an unclosed structural non-routine can force the next shop to re-open and re-disposition work that was thought settled.
Move from findings to resolution
Move from findings to a documented resolution path.
How the work runs
Rebuild the register
Assemble every non-routine card and link each back to the routine task or inspection that raised it.
Check dispositions and data
Confirm each finding has a recorded disposition and that any repair cites approved data present in the pack.
Test the closures
Verify corrective actions, final sign-offs, and the basis and expiry of every deferred item.
Report open liabilities
Deliver the exception list, flag structural and repeat findings, and name owners for the missing evidence.
What the buyer receives
- An exception list of unclosed and unsupported non-routines with the reason for each
- A source map linking each finding to its disposition and the data used to correct it
- A closure plan naming who can supply the missing data or disposition for each open item
Who uses the output
- Records teams proving a check left no findings hanging before it anchors a transaction
- Buyers' engineers assessing the repair and deferral liabilities on a specific serial number
- Structures engineers tracking findings that carry an ongoing inspection consequence
How the work fits into the transaction or program
Non-routines are the other half of a check: the routine cards call the work, and the findings they raise flow into this register. This review pairs with the task-card review and feeds the structural-repair review, since a non-routine that resulted in a repair becomes a repair record that has to be mapped for the life of the airframe.
Aircraft-specific considerations
High-cycle 737NG airframes generate structural non-routines around the usual fatigue-sensitive areas, and those findings tend to produce repairs that must be carried into the repair map rather than closed and forgotten. Findings on cabin and avionics modifications reference the modification or STC data rather than the base type design, so the approved data trail runs to a different source. Repeat findings across successive checks are the ones that most often reveal a disposition that treated a symptom without recording the recurring cause.
Jurisdiction-specific considerations
A 737NG dispositioned under an FAA operator and later reviewed for an EASA acceptance needs each repair's approved data read against the receiving authority's acceptance basis. The review records the authority under which each disposition was issued so the receiving side can judge whether the corrective data carries across.
Regulatory limits
The review reports whether non-routines are closed and supported as records. It does not approve a repair, issue a disposition, make an airworthiness determination, or replace the receiving operator's assessment of any repair it inherits.
What this review does not cover
- Engineering a new repair scheme for a finding that lacks one
- Physical inspection of the corrective work described on a card
- Structural repair mapping, which the structural-repair review covers in full
Specific to this review
- On a 737NG check, a non-routine closed without its approved data is treated as an unproven repair, because the disposition text and the substantiating figure are usually filed separately.
- Deferred structural findings are the highest-risk items in the register, since a lapsed deferral converts a tracked item into an undocumented open condition.
- Repeat findings across checks are read together, because a recurring defect closed each time without addressing the cause is a pattern a single card hides.
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 are deferred non-routines handled in the review?
Each deferral is checked for a stated basis and an expiry that has not lapsed, and structural deferrals are flagged separately because they carry an ongoing consequence. A deferral that lost its expiry is listed as an open condition rather than a tracked item.
Relevant glossary terms
Related pages
Where this fits
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