PA.IX.A.K3FAA-S-ACS-6C · Nov 2023Knowledge

Airspeed, including airspeed limitations.

ACS element text (the applicant demonstrates understanding of)

Airspeed, including airspeed limitations.

Bottom line

The pilot should not allow the airplane’s airspeed to pass the never-exceed speed (VNE), the maximum landing gear extended speed (VLE), or the maximum flap extended speed (VFE), as applicable. If the descent is conducted in turbulent conditions, the pilot also needs to comply with the design maneuvering speed (VA) limitations.

Key numbers

Key numbers for Airspeed, including airspeed limitations.
NumberWhat it means
VNE, VLE, or VFE, as applicable, in an emergency descentDo not exceed
VA limitations, if the descent is conducted in turbulent conditionsTurbulence limit
smooth air only, and then only with cautionYellow arc

FAA references

  1. AFH ch. 18 (p. 18-9) — FAA-H-8083-3C
  2. PHAK ch. 9 (p. 9-2) — FAA-H-8083-25C (2023)
  3. AFH ch. 9 (p. 9-13) — FAA-H-8083-3C
  4. PHAK ch. 9 (p. 9-4) — FAA-H-8083-25C (2023)
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