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AI.X.A.R4FAA-S-ACS-25 · Nov 2023Risk management

Effect of environmental elements on airplane performance (e.g., turbulence, microbursts...

ACS element text (the applicant demonstrates understanding of)

Effect of environmental elements on airplane performance (e.g., turbulence, microbursts, and highdensity altitude).

Bottom line

High density altitude is a “V” hazard that affects takeoffs, climbs, and landings. Maintain awareness of conditions that can lead to various types of turbulence, such as clear air turbulence, mountain waves, wind shear, and thunderstorms or microbursts. While wind shear may be reported, it often remains undetected and is a silent danger to aviation.

FAA references

  1. RMH ch. 3 (p. 3-7) — FAA-H-8083-2A
  2. AFH ch. 5, Environmental Factors (p. 5-2) — FAA-H-8083-3C
  3. PHAK ch. 12 (pp. 12-10–12-11) — FAA-H-8083-25C (2023)
  4. AFH ch. 5, Slow Flight (p. 5-9) — FAA-H-8083-3C
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