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CA.II.F.R3FAA-S-ACS-7B · Nov 2023Risk management

Wake turbulence.

ACS element text (the applicant demonstrates understanding of)

Wake turbulence.

Bottom line

The vortices of an aircraft can impose rolling moments exceeding the roll-control authority of an encountering aircraft. The greatest vortex strength occurs when the generating aircraft is heavy, slow, and clean. A pilot must envision the location of the vortex wake and adjust the flight path accordingly.

FAA references

  1. PHAK ch. 14 (pp. 14-26–14-27) — FAA-H-8083-25C (2023)
  2. PHAK ch. 5 (p. 5-9) — FAA-H-8083-25C (2023)
  3. AFH ch. 9 (pp. 9-10–9-11) — FAA-H-8083-3C
  4. AFH ch. 6 (p. 6-1) — FAA-H-8083-3C
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