Deferred maintenance
Embraer E-Jet deferred-maintenance records review
This review examines the deferred-maintenance log for an Embraer E-Jet and confirms each deferral was raised against a valid MEL or CDL reference, tracked within its category interval, and either cleared with a corrective entry or is still open within limits. It is run before a transaction or when the open-item picture has to be trusted. It checks that each deferral cites the provision it relies on, that the repair interval was observed, and that cleared items carry a corrective action. You receive an exception list of expired, mis-categorized, or unsupported deferrals, a source map to the MEL and CDL and the clearing entries, and a closure plan.
When this review is needed
- An E-Jet is changing hands and the buyer needs the open-deferral picture confirmed before accepting the aircraft.
- A deferral has been carried a long time and its category interval has to be checked against the MEL.
- A deferred item was cleared and the corrective entry that closes it has to be produced.
- The deferral log was inherited and no one has reconciled the open items against the MEL and CDL.
The problem
Deferred items are the records that are alive right now, so the log has to be right the day it is read, not eventually. A deferral gets raised against the wrong MEL category and carried past the interval that category allows; an item is cleared on the aircraft but the corrective entry never closes it on the log; a CDL item is deferred without the operational limitation it requires. On an E-Jet turning fast on a regional schedule, the deferral log churns constantly, and an expired or mis-categorized item hides in the churn until someone reconciles it.
What gets reviewed
- Each open deferral checked against a valid MEL or CDL reference
- Category intervals confirmed against the provision each deferral relies on
- Operational limitations for deferred items confirmed where the provision requires them
- Cleared deferrals matched to the corrective entry that closes each one
- The open-item picture reconciled between the log and the aircraft technical records
- Repeatedly deferred items identified where a recurring deferral masks an unresolved defect
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
- Each deferral cites a valid MEL or CDL provision applicable to the item
- No open deferral has been carried past the repair interval its category allows
- Deferred items requiring an operational limitation carry it in the records
- Every cleared deferral has a corrective entry that closes it on the log
- The open deferrals on the log reconcile with the aircraft technical records
Evidence normally required
- The deferred-maintenance log with open and cleared entries
- The MEL and CDL applicable to the aircraft
- Corrective-action entries that clear deferred items
- The aircraft technical records that should reflect the open items
- Any deferral tracking export from the operator's system
Common discrepancies
- A deferral carried past the repair interval its MEL category allows
- A deferral raised against a category that does not fit the item
- A cleared item still showing open on the log with no corrective entry
- A recurring deferral of the same item masking an unresolved underlying defect
What is at stake
A deferral carried past its category interval is a compliance exposure that sits on the aircraft until it is found, and if it is found by the buyer it reprices or stalls the deal. A cleared item still open on the log overstates the open-item burden and can trigger unnecessary work; a mis-categorized deferral applies the wrong repair interval and can put the aircraft outside the limitation it was dispatched under. Deferrals cleared without a corrective entry break the audit trail the next operator inherits.
Move from findings to resolution
Move from findings to a documented resolution path.
How the work runs
Pull the open items
List the open deferrals on the log and the MEL or CDL provision each relies on.
Check category and interval
Confirm each deferral fits its category and sits within the repair interval that category allows.
Verify the clearings
Match cleared items to corrective entries and reconcile the log to the technical records.
Flag the exceptions
Identify expired, mis-categorized, or recurring deferrals and map each to its source.
What the buyer receives
- An exception list of expired, mis-categorized, or unsupported deferrals
- A source map tying each deferral to its MEL or CDL provision and its clearing entry
- A closure plan for the deferrals that need clearing, recategorizing, or a corrective entry
Who uses the output
- Asset managers reading the true open-item burden into the price of the aircraft
- Continuing-airworthiness teams confirming the fleet is dispatching within MEL limits
- Records teams reconciling the deferral log before the aircraft is accepted
How the work fits into the transaction or program
The deferral review reads the live open-item state that the status list and the technical records should agree on. It runs before a transaction or as a standing check, and its exceptions feed the clearing, recategorizing, and record-correction that have to close before the open-item picture can be trusted at handover.
Aircraft-specific considerations
E-Jets on high-frequency regional operations generate and clear deferrals faster than a low-utilization aircraft, because short turnarounds push more items to deferral rather than immediate rectification, so the log is busier and an expired item is easier to lose. Recurring avionics and cabin deferrals are common on these aircraft, and the review watches for the same item deferred repeatedly, which usually signals an underlying defect that clearing entries keep resetting rather than resolving.
Jurisdiction-specific considerations
The MEL is approved for the operator under its own authority, so an item acceptable to defer under one operator's FAA-approved MEL may sit differently under an EASA-approved MEL after a transfer. The review notes where a carried deferral will need re-evaluation against the receiving operator's approved MEL rather than the one it was raised under.
Regulatory limits
The review confirms deferrals are valid, tracked, and cleared with evidence. It does not raise or clear a deferral, approve an MEL provision, or determine that the aircraft is airworthy to dispatch with an item deferred.
What this review does not cover
- Raising, clearing, or dispositioning any deferred item
- Approving or amending the MEL or CDL
- Any airworthiness or dispatch determination on a deferred item
Specific to this review
- A deferral log has to be correct the day it is read, because the open items are constraints on how the aircraft can be dispatched right now.
- The category is the load-bearing field: a mis-categorized deferral applies the wrong repair interval, so it can be outside limits while reading as compliant.
- A repeatedly deferred item is a signal, not a routine entry, because it usually means the underlying defect is being reset rather than resolved.
- A cleared item still open on the log overstates the open-item burden and can trigger work the aircraft does not actually need.
- The MEL is approved for a specific operator, so a deferral valid under the outgoing operator may need re-evaluation against the receiving operator's approved MEL after a transfer.
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
How do you tell a routine deferral from one that signals a real problem?
The review looks at deferral history, going beyond the current open list. The same item deferred and cleared repeatedly usually means the corrective action keeps resetting the fault rather than fixing it. Those recurring items are flagged separately from ordinary deferrals so the underlying defect can be addressed.
Relevant glossary terms
Related pages
Where this fits
Talk to an engineer who has done this work
We will walk through your current state, the records or evidence involved, and a scoped first engagement.
Talk through the aircraft, records, evidence, deadline, and next useful step.