NTSB CAROL · Event
Event DFW06LA087
Aircraft involved
Probable cause & findings
A loss of aircraft control for undetermined reasons.
Factual narrative
On March 21, 2006, at 1040 central standard time, a single-engine Weatherly 201B agricultural airplane, N1257W, was destroyed upon impact with terrain following a loss of control while maneuvering near the Hondo Municipal Airport, near Hondo, Texas. The commercial pilot, sole occupant of the airplane, was fatally injured. The airplane was registered to Rusty's Flying Service, of Hondo, Texas, and operated by Ag Flyers Incorporated, of Hondo, Texas. No flight plan was filed and visual meteorological conditions prevailed for the local calibration flight conducted under 14 Code of Federal Regulations Part 91. According to a witness, who was also the operator's Chief Pilot, the purpose of the flight was to observe the calibration of the hopper. The pilot planned to make two passes over a field and then land. Approximately 100-gallons of water were loaded into the hopper. The pilot performed a pre-flight inspection, then started the airplane, taxied to the runway, and departed on Runway 35R. The Chief Pilot stated that after the airplane took off, it turned 180 degrees and flew along the west side of Runway 17R. The airplane then turned another 180 degrees and started the spray-run. The witness added that, "after completion of his spray pass [the pilot] pulled-up and started to turn left. I saw water being dumped from the aircraft; the aircraft pitched-up, rolled to the right and impacted the ground nose-first." The airplane came to rest in a field northwest of Runway 35L. A Federal Aviation Administration (FAA) safety inspector, who examined the airplane, reported that due to impact damage, he could not determine if there was a mechanical problem with the dump valve. However, he reported that the dump valve was found in the full open position and the stop for the handle was in a position that would keep it from being returned to the closed position. The pilot held a commercial certificate for airplane single-engine land. His most recent FAA second class medical was issued on December 14, 2005. At the time of his last physical examination, he reported a total of 325 flight hours. According to the operator, the pilot had accrued 9 hours in the accident airplane, of which 8 hours were accumulated in the 30 days preceding the accident. Weather at the airport at 0951, was reported as wind from 030 degrees at 7 knots, visibility 10 miles, temperature 60 degrees Fahrenheit, dewpoint 25 degrees Fahrenheit, and a barometric pressure setting of 30.15 inches of Mercury. The 325-hour pilot was testing the calibration of the spray function on a single-engine agricultural airplane by making low passes over a field adjacent to a runway. Upon completion of the first spray pass, the pilot increased his pitch angle, and entered a left turn. During this time, a witness observed water being dumped from the airplane. The airplane continued to pitch up, then it rolled to the right, and impacted the ground nose first. Due to impact damage, it could not be determined if there was a mechanical problem with the dump valve. However, the dump valve was found in the full open position and the stop for the handle was in a position that would have kept it from being returned to the closed position. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_2006_DFW06LA087.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Related research
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Academic papers and agency reports matching this event's aircraft type or causal vocabulary (loss of control). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- Embry-Riddle Scholarly Commons 2025 · Journal article (JAAER)
A Scoping Review of Aviation Loss of Control Inflight Research
Loss of control – inflight (LOC-I) contributes to aircraft accidents at unacceptably high rates. Significant industry efforts and research have aimed to improve LOC-I prevention, detection, and recove…
- SKYbrary (Eurocontrol) 2024 · SKYbrary article
Loss of Control In-Flight (LOC-I) — SKYbrary Knowledge Base
SKYbrary comprehensive knowledge-base entry on Loss of Control In-Flight — definitions, contributing factors, accident case studies (Air France 447, Colgan 3407), and prevention strategies.
- NTSB Aircraft Accident Reports 2022 · Accident report
Loss of Control on Takeoff in Icing Conditions — Citation 560XL
Cessna Citation 560XL fatal takeoff icing accident, March 2018. Investigation of a Citation 560XL loss-of-control takeoff accident in icing conditions.
- Semantic Scholar 2021 · Article (Aviation)
ANALYSIS OF GENERAL AVIATION FIXED-WING AIRCRAFT ACCIDENTS INVOLVING INFLIGHT LOSS OF CONTROL USING A STATE-BASED APPROACH
Inflight loss of control (LOC-I) is a significant cause of General Aviation (GA) fixed-wing aircraft accidents. The United States National Transportation Safety Board’s database provides a rich source…
- NASA NTRS 2021 · Presentation
Use of Design of Experiments in Determining Neural Network Architectures for Loss of Control Detection
Abstract—We describe empirical methods for selecting a neural network architecture to implement belief state inference on generic commercial transport aircraft.
- NASA NTRS 2021 · Conference Paper
Use of Design of Experiments in Determining Neural Network Architectures for Loss of Control Detection
We describe empirical methods for selecting a neural network architecture to implement belief state inference on generic commercial transport aircraft.
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