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PA.VI.A.K7FAA-S-ACS-6C · Nov 2023Knowledge

Planned calculations versus actual results and required corrections.

ACS element text (the applicant demonstrates understanding of)

Planned calculations versus actual results and required corrections.

Bottom line

If there is a deviation from the desired altitude/distance target, the energy state needs to be adjusted.

Key numbers

Key numbers for Planned calculations versus actual results and required corrections.
NumberWhat it means
1 mile per 10 knots of wind at cruise altitudeTOD wind fix
10-knot changeSpeed correction
1,000 feet per minuteImmediate descent
about 21 percentTailwind landing
20 percentSpeed landing

FAA references

  1. AFH ch. 16 (pp. 16-18–16-19) — FAA-H-8083-3C
  2. PHAK ch. 11 (pp. 11-17–11-18) — FAA-H-8083-25C (2023)
  3. PHAK ch. 16 (pp. 16-34–16-35) — FAA-H-8083-25C (2023)
  4. Chart Users' Guide LANDING MINIMUMS — effective 22 January 2026
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