AA.VII.G.K3FAA-S-ACS-11A · Nov 2023Knowledge
How to determine required landing distance and a suitable runway for landing.
How to determine required landing distance and a suitable runway for landing.
Bottom line
Landing distance available is the length of the runway declared available and suitable for landing an aircraft. Unfactored certificated AFM landing distance is the landing distance required without any factors applied. A time of arrival landing assessment considers temperature, airplane weight and configuration, approach speed at threshold, adjustment to landing distance such as autoland, and planned use of airplane ground deceleration devices.
Key numbers
| Number | What it means |
|---|---|
| 10 knots tailwind increases landing distance by about 21 percent | Tailwind |
| 10 percent landing speed increase increases landing distance by 20 percent | Excess speed |
| at least 15 percent for time of arrival assessment based on manual wheel braking | Safety margin |
| 1,500 feet or 7 seconds from threshold to touchdown | Air distance |
FAA references
- SAFO 19001 — SAFO 19001
- PHAK ch. 11 (pp. 11-17–11-18) — FAA-H-8083-25C (2023)
- RMH ch. 3 (p. 3-7) — FAA-H-8083-2A
- PHAK ch. 11 (p. 11-14) — FAA-H-8083-25C (2023)
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