Non-Towered Airport Flight Operations
Non-towered airport flight operations — recommended traffic-pattern procedures and radio practice where there’s no control tower.
About this document
AC 90-66, Non-Towered Airport Flight Operations, provides the FAA's recommended practices for operating at airports without an operating control tower — where pilots self-announce and see-and-avoid governs. It covers standard traffic-pattern entry and flow, the common traffic advisory frequency (CTAF) and recommended radio phraseology, right-of-way, and how to integrate with other traffic safely.
It is high-value reading for student and private pilots, since most training happens at or around non-towered fields.
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Take a free practice test →AC-90-66 is an official FAA publication in the public domain. We host a copy so you can read it in-browser; always confirm you are reading the current edition on faa.gov. The description above is an original summary and is a study aid, not a substitute for the document or the regulations.