AI.VII.A.R2eFAA-S-ACS-25 · Nov 2023Risk management
e. Takeoff surface/condition
Effects of: e. Takeoff surface/condition
Bottom line
Any runway surface that is not hard and smooth increases the ground roll during takeoff. Obstructions such as mud, snow, or standing water reduce the airplane's acceleration down the runway. If acceleration does not allow the airspeed to reach 70 percent of lift-off airspeed by the midpoint, the takeoff should be aborted, as it may not be possible to liftoff in the remaining runway.
FAA references
- PHAK ch. 11 (p. 11-12) — FAA-H-8083-25C (2023)
- 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)
- RMH App. C (p. C-1) — FAA-H-8083-2A
- RMH ch. 3 (p. 3-7) — FAA-H-8083-2A
- AFH ch. 2 (p. 2-22) — FAA-H-8083-3C
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