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Atlas / NTSB / DEN99LA169

NTSB CAROL · Event

Event DEN99LA169

1999-09-23 ANIMAS, New Mexico, United States Airport · NONE Minor 1 aircraft Status: Completed

Aircraft involved

Probable cause & findings

A inadvertent stall during initial climb following takeoff. Factor were: high gross weight, high density altitude, inadequate preflight planning and preparation, and soft terrain.

Factual narrative

On September 23, 1999, at 1335 mountain daylight time, a Schweizer G-164A, N8731H, impacted terrain following takeoff from Cotton City Airport, a private facility, near Animas, New Mexico. The aircraft sustained substantial damage and the commercial pilot received minor injuries. The flight was an aerial application flight operating under Title 14 CFR Part 137. Visual meteorological conditions prevailed and no flight plan was filed. According to information supplied by witnesses and the pilot, both of whom provided verbal statements to the New Mexico State Police, the aircraft appeared to stall/mush during initial climb following takeoff from the 2640-foot dirt airstrip. In his written statement, the pilot provided information that the aircraft did not have a mechanical failure or malfunction but began to "shudder and settle" immediately following lift off and he attempted to conduct a forced landing to a field. During landing roll, the aircraft nosed over in soft terrain. Based on a reported full fuel load and full chemical load, the computed aircraft weight at the time of the accident was 4,500 pounds, which is the maximum certificated gross weight. No performance data was available. Weather conditions at the time of the accident were visual conditions with variable wind at 6 knots and a computed density altitude of 7,400 feet above mean sea level (msl). On an aerial application flight, during initial climb following takeoff at maximum gross weight and a density altitude of 7,400 feet, the aircraft entered a stall/mush condition. The pilot attempted a forced landing in a field, which was soft, and the aircraft nosed over during landing roll. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1999_DEN99LA169.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

Related research

What the literature says.

Academic papers and agency reports matching this event's aircraft type or causal vocabulary (stall). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.

Browse the full corpus — academia portal ↗