Deferred maintenance
Bombardier CRJ family deferred-maintenance records review
This review confirms that every open item on a CRJ's deferred-maintenance log is deferred against a real limit and either cleared on time or still within it. It fits a team evaluating, transferring, or maintaining one tail, and it works from that aircraft's deferment log rather than a fleet norm. The work checks each deferral against its MEL or CDL basis, confirms the deferral interval is tracked, and follows cleared items to the corrective entry that closed them. You receive an exception list of expired or unsupported deferrals, a source map to each basis, and a closure plan for that airframe.
When this review is needed
- A CRJ is being transferred and the buyer needs open deferrals cleared or disclosed with their limits.
- The deferment log runs long and it is unclear which items remain within their interval.
- A deferral references an MEL category and its tracking against that category has never been checked.
- A non-routine review found items pushed to deferral that have to be reconciled to the log.
The problem
Deferred maintenance on a CRJ is a live list, and on a busy regional operation it grows faster than it clears. A defect can be deferred against an MEL category without the associated maintenance or operational procedure being tracked, an interval can lapse while the item still shows open, and at an operator change the deferment log can arrive without the clearing entries that would show which items are actually closed. The log reads as control while some of its items have quietly gone past their limit.
What gets reviewed
- Each open deferral checked against its MEL or CDL basis and category
- Deferral intervals tracked so items still within limit are distinguished from expired ones
- Associated maintenance and operational procedures confirmed where the category requires them
- Cleared items followed to the corrective entry that closed them
- Items pushed from non-routine findings reconciled into the deferment log
- Repeat deferrals of the same defect flagged where a fix keeps being postponed
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 open deferral cites an MEL or CDL basis that supports deferring it
- The deferral interval is tracked and the item is shown within or past its limit
- Categories requiring an associated procedure show that procedure applied
- A cleared item has a corrective entry that actually closed the defect
- Non-routine items marked deferred appear in the log with a basis and interval
Evidence normally required
- The deferred-maintenance log for the aircraft
- The MEL and CDL applicable to the operation
- Deferral entries with their basis, category, and interval
- Corrective entries clearing previously deferred items
- The non-routine register for items pushed to deferral
Common discrepancies
- A deferral carried past the interval its MEL category allows
- An item deferred against an MEL category with no associated procedure recorded
- A cleared deferral with no corrective entry behind the closure
- The same defect deferred repeatedly with the permanent fix never scheduled
What is at stake
A deferral carried past its MEL or CDL interval is an item the aircraft should not have dispatched on, which is a compliance finding as well as a value one. At a transfer, open deferrals the buyer did not expect become last-minute corrective work or a repriced deal, and a clearing entry that cannot be produced leaves an item that reads closed but has no evidence behind it.
Move from findings to resolution
Move from findings to a documented resolution path.
How the work runs
Read the open log
List every open deferral with its MEL or CDL basis, category, and interval.
Test the limits
Confirm each item is within its interval and any required procedure is recorded.
Follow the clearances
Trace cleared items to the corrective entry that actually closed them.
Rank the exceptions
Flag expired and unsupported deferrals and order them by dispatch and transfer impact.
What the buyer receives
- An exception list of expired, unsupported, or improperly cleared deferrals
- A source map from each deferral to its MEL or CDL basis and interval
- A closure plan ordered by which items block dispatch, transfer, or compliance
Who uses the output
- Records teams clearing the deferment log before redelivery or a transfer
- CAMO leads confirming open deferrals are within their limits and bases
- Asset managers weighing open deferred work into the value of the tail
How the work fits into the transaction or program
The deferred-maintenance review catches the items the non-routine review pushed to deferral and confirms each is tracked to a real limit. Its exception list drives the corrective work a redelivery has to clear and the disclosures a data room carries, and expired deferrals feed straight into remediation.
Aircraft-specific considerations
CRJ regional operations run tight dispatch schedules, so deferrals accumulate between checks and the log is worked hardest at heavy-check exit, which is where expired items surface. Because operator changes are common on this type, the deferment log frequently arrives without the clearing history from the prior operator, leaving items that read open but may in fact have been closed elsewhere.
Jurisdiction-specific considerations
FAA and EASA differ on MEL construction and on the categories and intervals a deferral may use, so a CRJ deferment log built under one system is checked against the MEL the relying operation will hold, and deferrals whose basis would not carry to the receiving MEL are flagged.
Regulatory limits
The review confirms deferrals are supported and tracked and lists those that are expired or unsupported. It does not clear a deferral, perform the corrective maintenance, or determine that the aircraft is airworthy or dispatchable.
What this review does not cover
- Clearing a deferral or performing the corrective maintenance
- Authoring or revising the MEL or CDL
- Any airworthiness or dispatch determination on the aircraft
Specific to this review
- A deferral is only valid while it is inside its MEL or CDL interval; an item past that limit is a compliance finding, not a tracked open item.
- Some MEL categories require an associated maintenance or operational procedure, and that procedure is what most often goes unrecorded even when the deferral itself is logged.
- The same defect deferred check after check is a signal the permanent fix keeps getting postponed, which reads very differently to a buyer than a single open item.
Sources
U.S. Government (eCFR). Maintenance recordkeeping content and approval-for-return-to-service requirements, including 43.9, 43.11, and Appendix B.
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.
European Union / EASA. Continuing airworthiness, maintenance records, CAMO responsibilities, and the airworthiness review process in the EASA system.
International Civil Aviation Organization. International standards for aircraft operation, including maintenance program and recordkeeping expectations.
Frequently asked questions
An item shows as cleared on the log. Why check further?
A log entry marking an item cleared has to be backed by a corrective entry that actually closed the defect. Without that entry the item reads closed but has no evidence behind it, so the review follows each clearance to its corrective record rather than accepting the log status.
Relevant glossary terms
Related pages
Where this fits
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