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AI.VII.A.R2cFAA-S-ACS-25 · Nov 2023Risk management

c. Tailwind

ACS element text (the applicant demonstrates understanding of)

Effects of: c. Tailwind

Bottom line

A tailwind requires the aircraft to achieve a greater groundspeed to attain lift-off speed. Upslope or tailwinds on takeoff performance require greater acceleration than normal and, under some circumstances, prevent takeoff entirely.

FAA references

  1. AIM 7-6-8 (Use of Runway Half-way Signs at Unimproved Airports) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
  2. SEA ch. 4 (p. 4-15) — FAA-H-8083-23
  3. PHAK ch. 5 (p. 5-12) — FAA-H-8083-25C (2023)
  4. AIM 7-4-4 (Vortex Behavior) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
  5. PHAK ch. 11 (p. 11-15) — FAA-H-8083-25C (2023)
  6. AFH ch. 9 (p. 9-27) — FAA-H-8083-3C
  7. AIM 4-3-17 (VFR Helicopter Operations at Controlled Airports) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
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