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PA.IV.H.S4FAA-S-ACS-6C · Nov 2023Skills

Scan the landing area for traffic and obstructions.

ACS element text (the applicant demonstrates understanding of)

Scan the landing area for traffic and obstructions.

Bottom line

Ground topography and large buildings can break up the flow of the wind and create wind gusts that change rapidly in direction and speed. Pilots, in all phases of flight, must remain vigilant of possible wake effects created by other aircraft.

FAA references

  1. PHAK ch. 12 (p. 12-8) — FAA-H-8083-25C (2023)
  2. AIM 7-4-4 (Vortex Behavior) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
  3. AFH ch. 9 (p. 9-21) — FAA-H-8083-3C
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