When deferring a maintenance discrepancy, which documentation must be provided?

• A. Approved deferral documentation, logbook entry, and compliance with AD/SB when applicable.
• B. Only the date.
• C. A notarized letter.
• D. A supervisor's signature.

Answer: (A)

Deferring a maintenance discrepancy requires formal authorization and traceability in the aircraft’s records. The approved deferral documentation must spell out what is being deferred, the justification for deferral, any operational limitations or conditions, and the time frame or replacement action required. Along with this, you must update the maintenance logbook with an entry that documents the discrepancy, the deferral decision, the date, and any actions taken or planned. This creates an auditable record that the deferral was properly reviewed and approved and that regulatory obligations continue to be observed. If there are applicable Airworthiness Directives or Service Bulletins, you must verify and note compliance, since those directives can impose mandatory actions or ongoing requirements even when a deferral is granted. Without these elements—formal deferral documentation, a logbook entry, and AD/SB compliance when relevant—the deferral wouldn’t meet proper regulatory and safety recording standards. A date alone lacks authorization and traceability; a notarized letter isn’t a standard requirement; and a supervisor’s signature alone does not provide the complete regulatory-record justification and tracking needed.