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AA.VII.C.K3FAA-S-ACS-11A · Nov 2023Knowledge

Effects of atmospheric conditions on emergency approach and landing.

ACS element text (the applicant demonstrates understanding of)

Effects of atmospheric conditions on emergency approach and landing.

Bottom line

Various surface features and atmospheric conditions encountered in landing can create illusions of being on the wrong approach path. In extreme cold or high pressure, height above ground and obstacles may be less than indicated.

Key numbers

Key numbers for Effects of atmospheric conditions on emergency approach and landing.
NumberWhat it means
10 percent lead (100 feet if descent rate is 1,000 feet per minute) to slow the descent before landingGlide lead

FAA references

  1. PHAK ch. 17 (pp. 17-11–17-12) — FAA-H-8083-25C (2023)
  2. RMH ch. 3 (p. 3-7) — FAA-H-8083-2A
  3. PHAK ch. 17 (p. 17-10) — FAA-H-8083-25C (2023)
  4. AFH ch. 9 (p. 9-20) — FAA-H-8083-3C
  5. AFH ch. 9 (p. 9-28) — FAA-H-8083-3C
  6. AFH ch. 3 (pp. 3-23–3-24) — FAA-H-8083-3C
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