The FAA’s Advisory Circular (AC) 90-23G, “Aircraft Wake Turbulence,” is the latest edition of the agency’s guidance on this topic, having been revised in February 2014. The new AC, at paragraph 9, “VORTEX ENCOUNTER GUIDANCE,” states in part:
Flight Paths
The FAAs Advisory Circular (AC) 90-23G, Aircraft Wake Turbulence, is the latest edition of the agencys guidance on this topic, having been revised in February 2014. The new AC, at paragraph 9, VORTEX ENCOUNTER GUIDANCE, states in part:
Key Takeaways:
- The FAA's AC 90-23G states that wake turbulence encounters are not necessarily hazardous, with severity varying based on factors like encounter angle, aircraft size, and distance.
- The guidance highlights increased induced roll probability when aircraft headings are aligned or parallel, advising pilots to avoid the area below and behind generating aircraft, especially at low altitudes.
- The current AC primarily focuses on hazards when an aircraft is aligned or positioned below/behind a generating aircraft, but it does not specifically address scenarios involving crossing behind at the same altitude.
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