Deferred maintenance
Bombardier Global 7500 deferred-maintenance records review
This review checks that every open and cleared deferral on a Bombardier Global 7500 rests on a valid basis and can be traced to a clearing entry. It is run by or for the party evaluating, transferring, or operating the aircraft, usually ahead of a transaction or a program handover. It examines the deferred-maintenance log, the MEL and CDL references cited for each item, the category interval that governs how long a defect may remain open, and the corrective action that eventually closed it. You receive an exception list of unsupported or overdue deferrals, a source map to the underlying records, and a closure plan for the specific tail.
When this review is needed
- A buyer is pricing the aircraft and needs to know which open deferrals will convert into work after closing.
- The tail is moving between management providers and the outgoing deferral log has to be reconciled before handover.
- A deferral has sat open longer than its category allows and no one has confirmed the extension basis.
- A cleared item shows a corrective action but the clearing entry cannot be located in the records.
The problem
Deferrals accumulate quietly on a Global 7500 because the MEL lets a defect ride for a defined interval, and on a busy owner-flown tail the log is often the only place that history lives. When a deferral is written against the wrong MEL item, or an interval lapses without a documented extension, the log still reads as controlled while the underlying position is not. The party inheriting that log then owns whatever it fails to say.
What gets reviewed
- Every open deferral matched to a specific MEL or CDL item and its allowable category
- Category intervals checked against the date each deferral was raised
- Extensions and re-deferrals confirmed against an approved basis rather than a schedule slip
- Cleared deferrals traced from the corrective action to the return-to-service entry
- Repetitive deferrals reviewed for an underlying defect the log is masking
- The deferred-maintenance log reconciled against the technical log and work packages
Scope this review
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What gets validated
- Each open deferral cites a valid MEL or CDL item that actually applies to the installed configuration
- No open deferral has passed its category interval without a documented, approved extension
- Every cleared deferral has a matching corrective-action entry and return-to-service signature
- Repetitive deferrals are examined for a root defect rather than accepted as routine
- The deferral count in the log reconciles with the technical log and the current status summary
Evidence normally required
- The current deferred-maintenance log with open and cleared items
- The MEL and CDL applicable to this Global 7500 configuration
- Technical log pages covering the deferral and clearing dates
- Work packages or task cards recording the corrective actions
- The current status summary the operator maintains for the tail
Common discrepancies
- A deferral written against an MEL item that does not match the installed cabin or avionics fit
- An open item carried past its category interval with no extension on file
- A cleared deferral whose corrective action is recorded but whose closure signature is missing
- The same defect re-deferred repeatedly, pointing to a fault the log never resolved
What is at stake
An open item carried past its category interval without an extension basis is a live compliance exposure, not a paperwork detail. If a clearing entry is missing, the corrective action cannot be relied on, and the defect may have to be treated as still open. Both outcomes convert into unplanned work and lost availability at the point where the aircraft was expected to be clean.
Move from findings to resolution
Move from findings to a documented resolution path.
How the work runs
Pull every deferral
Assemble open and cleared items from the log, the technical log, and the work packages for the tail.
Test the basis
Match each deferral to a valid MEL or CDL item and confirm the category interval against the raise date.
Trace the closures
Follow each cleared item from corrective action to return-to-service signature.
Sequence the open work
Rank the unsupported and overdue items and set a closure order for the operator or buyer.
What the buyer receives
- An exception list ranking each unsupported, overdue, or unclosed deferral by exposure
- A source map tying every log line to the MEL basis and the clearing evidence
- A closure plan sequencing the open items the operator or buyer must clear
Who uses the output
- Asset managers pricing the work that open deferrals will convert into after closing
- Records teams reconciling the log before it transfers to a new management provider
- Continuing-airworthiness staff confirming no deferral is riding past its allowable interval
How the work fits into the transaction or program
The deferral review sits alongside the AD and inspection status work because an open item often traces back to a task the aircraft has not yet cleared. Its closure plan feeds the redelivery binder or the post-acquisition baseline, so the receiving party inherits a log whose every line is either supported or explicitly flagged.
Aircraft-specific considerations
The Global 7500 is a new-generation ultra-long-range business jet with an integrated cabin management system and fly-by-wire flight controls, so a deferral against a cabin or avionics function has to be checked against the exact software and equipment standard on the tail rather than a generic MEL line. Many of these aircraft pass through management-provider transitions early in life, and the deferral log is one of the records most likely to lose continuity at that handover.
Jurisdiction-specific considerations
An FAA-operated Global 7500 and an EASA-managed one apply MEL relief under different operational frameworks, so a deferral that was valid on one register does not automatically carry to the other. The review notes where an open item would need re-basing if the aircraft changes operating authority.
Regulatory limits
The review reports whether each deferral is supported by its stated basis and closure evidence. It does not grant MEL relief, approve an extension, return the aircraft to service, or make any airworthiness determination on the open items.
What this review does not cover
- Performing or signing off the corrective maintenance behind any deferral
- Granting or extending MEL relief on an open item
- Physical inspection of the systems the deferrals relate to
Specific to this review
- A deferral is only as valid as the MEL item it cites, and on a highly configured cabin the wrong item number is a common quiet error.
- Category intervals are the enforceable clock on a deferral, so an item that looks controlled in the log can be out of compliance the moment its interval lapses without an extension.
- Repetitive re-deferrals of the same defect are a signal that the log is managing a symptom rather than recording a fix.
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
Does an open deferral in the log mean the aircraft is not airworthy?
Not on its own. A deferral raised against a valid MEL item and still inside its category interval is a controlled condition. The exposure appears when the interval has lapsed without an approved extension, or when the item was written against an MEL line that does not apply to the installed configuration.
Relevant glossary terms
Related pages
Where this fits
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