Definition
A formal change or update issued to an aeronautical publication, chart, procedure, or NOTAM. The amendment number identifies which revision of the document is currently in effect.
Plain English
An official update to a chart or procedure. AMDT tells you which version you're looking at and confirms it has been changed since it was first published.
Context Anchor
Pilots may see AMDT in FAA abbreviations, notices, chart updates, and other published aviation information.
Derivation
From Latin 'emendare', meaning 'to correct or free from fault'. An amendment in aviation is exactly that — a correction or update to keep published information current.
Why Pilots Care
Pilots must check amendments to keep procedures and plans current, avoiding use of outdated information that could affect safety or compliance.
Intuition Check
Do not think of amendment only as a change to a law or constitution. In aviation, an AMDT is any official correction or update to previously issued aviation information.
Example Sentence 1
Before briefing the approach, the pilot checked that the chart matched the current AMDT number listed in the NOTAMs.
Example Sentence 2
Review the latest AMDT on the flight plan to confirm the route remains valid.