What Is Deferred Defect in Aircraft Maintenance?
Deferred Defect defined for aviation professionals, with its operational or commercial use, document context and related terminology.
Definition and Operating Context
A deferred defect is a known aircraft discrepancy whose rectification has been postponed under an approved basis such as the MEL, CDL or another authorized maintenance procedure.
Aviation Glossary
Term: Deferred Defect
Category: Airworthiness & Maintenance
Where It Sits in Continuing Airworthiness
Deferred Defect forms part of the technical framework used to establish, maintain or document aircraft airworthiness. Applicability depends on aircraft type, authority, approved maintenance data and the operator's maintenance programme.
How It Is Used
Deferral requires correct categorization, placarding or operating procedures where applicable and rectification within the permitted period.
Records and Transaction Impact
Technical status must be supported by current records. Buyers, lessors, lenders and MRO organizations normally verify the applicable document, revision, compliance status and remaining maintenance exposure rather than relying on a description alone.
Related Aviation Topics
Related ACMI World coverage includes aircraft maintenance reserves, aircraft redelivery conditions, pre-purchase inspection findings, aircraft records and resale value and business jet MRO providers.
Deferral requires correct categorization, placarding or operating procedures where applicable and rectification within the permitted period.
Deferred Defect FAQ
What does Deferred Defect mean in aviation?
A deferred defect is a known aircraft discrepancy whose rectification has been postponed under an approved basis such as the MEL, CDL or another authorized maintenance procedure.
Why does Deferred Defect matter?
Deferral requires correct categorization, placarding or operating procedures where applicable and rectification within the permitted period.
Where would an aviation professional encounter Deferred Defect?
It is commonly encountered in airworthiness & maintenance documents, procedures, calculations or operating discussions where the underlying technical or commercial issue is relevant.
Can technical status be accepted without supporting records?
Normally no. Airworthiness and asset-value conclusions depend on records showing applicability, compliance, release status, accumulated life and maintenance history.