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Atlas / NTSB / WPR11CA365

NTSB CAROL · Event

Event WPR11CA365

2011-08-01 Rawlings, Wyoming, United States Airport · KRWL None 1 aircraft Status: Completed

Aircraft involved

Probable cause & findings

The pilot's decision to attempt a takeoff at a density altitude that was outside the performance envelope of the airplane. Also causal was the flight's likely encounter with a sudden tailwind gust.

Factual narrative

The pilot reported that prior to takeoff, he noted an approaching storm but estimated that the wind was light and variable for the takeoff roll. The airplane was slow to accelerate and reached the 50 knot rotation speed halfway down the runway. The pilot stated that the airplane lifted off and maintained an altitude a few feet above the runway, but lost altitude at the end. The airplane struck the ground and subsequently nosed over, coming to rest inverted. A few minutes after the accident, the pilot reported that it began to rain. The airport density altitude at the time of the accident was calculated to be approximately 9,000 feet, which is 1,000 feet above the manufacturers recommended maximum takeoff altitude as outlined in the Pilot's Operating Handbook. The weather observation facility located on the field reported that 3 minutes before the accident the wind was a left quartering tailwind at 5 knots, while shortly after the accident the wind was a left quartering tailwind at 22 knots, gusting to 32 knots with respect to the airplane's takeoff runway direction. The pilot reported that there were no preimpact mechanical malfunctions or failures with the airframe or engine that would have precluded normal flight. The pilot reported that prior to takeoff, he noted an approaching storm but estimated that the wind was light and variable for the takeoff roll. The airplane was slow to accelerate and reached the 50 knot rotation speed halfway down the runway. The pilot stated that the airplane lifted off and maintained an altitude a few feet above the runway, but lost altitude at the end. The airplane struck the ground and subsequently nosed over, coming to rest inverted. A few minutes after the accident, the pilot reported that it began to rain. The airport density altitude at the time of the accident was calculated to be approximately 9,000 feet, which is 1,000 feet above the manufacturer's recommended maximum takeoff altitude as outlined in the Pilot's Operating Handbook. The weather observation facility located on the field reported that 3 minutes before the accident the wind was a left quartering tailwind at 5 knots, while shortly after the accident the wind was a left quartering tailwind at 22 knots, gusting to 32 knots with respect to the airplane's takeoff runway direction. The pilot reported that there were no preimpact mechanical malfunctions or failures with the airframe or engine that would have precluded normal flight. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).

  • C Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C
  • Environmental issues-Conditions/weather/phenomena-Wind-Tailwind-Effect on operation
  • Environmental issues-Conditions/weather/phenomena-Temp/humidity/pressure-High density altitude-Effect on operation
  • C Personnel issues-Action/decision-Info processing/decision-Decision making/judgment-Pilot - C
  • C Aircraft-Aircraft oper/perf/capability-Aircraft capability-(general)-Capability exceeded - C
  • C Aircraft-Aircraft oper/perf/capability-Performance/control parameters-(general)-Not attained/maintained - C
  • C Personnel issues-Task performance-Use of equip/info-Use of manual-Pilot - C

Verbatim from NTSB's published report. Source file NTSB_2011_WPR11CA365.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.