CHI98LA186
1998-06-02 · GREENFIELD, Iowa, United States · Minor · 1 aircraft · Status: Completed
Airport GFZ
Aircraft involved
Probable cause & findings
the initial climb airspeed not obtained/maintained after liftoff by the pilot in command. A factor was the improper compensation for wind conditions by the pilot in command.
Factual narrative
On June 2, 1998, at 1830 central daylight time, a Sheets Kitfox II, N487JS, piloted by a private pilot, was destroyed when it impacted the terrain, following a loss of control during takeoff from runway 32 (2500' x 45', dry, asphalt) at the Greenfield Municipal Airport, near Greenfield, Iowa. Visual meteorological conditions prevailed at the time of the accident. The 14 CFR Part 91 personal flight was not operating on a flight plan. The pilot sustained minor injuries. The one passenger reported no injures. The local flight was originating at the time of the accident. According to the pilot's written statement, the pilot was attempting a normal takeoff at the time of the accident. The pilot stated that he was using 20-degrees of flaps for takeoff, which is not the normal takeoff configuration, because he was testing a new takeoff technique he had seen in an aviation publication. The piloted stated that the aircraft became airborne, sooner than expected, and drifted to the right of the runway centerline. While the aircraft was drifting across the runway it impacted the ground approximately 30' from the runway centerline. In a telephone conversation with the pilot, he stated that the accident could of been avoided if he had built up additional airspeed before liftoff and after liftoff kept the aircraft low in ground effect. The pilot stated that he was using 20-degrees of flaps for takeoff, which is not the normal takeoff configuration, because he was testing a new takeoff technique he had seen in an aviation publication. The piloted stated that the aircraft became airborne, sooner than expected, and drifted to the right of the runway centerline. While the aircraft was drifting across the runway it impacted the ground approximately 30' from the runway centerline. In a telephone conversation with the pilot, he stated that the accident could of been avoided if he had built up additional airspeed before liftoff and after liftoff kept the aircraft low in ground effect. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1998_CHI98LA186.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Related research
Matched on aircraft type or causal vocabulary (loss of control). All research papers
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- SKYbrary (Eurocontrol) 2024 · SKYbrary article Loss of Control In-Flight (LOC-I) — SKYbrary Knowledge Base
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- Semantic Scholar 2024 · Article (International Conference on Networking and Services) Risk Assessment of Loss of Control In-Flight Trajectories for Urban Air Mobility Safety
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- NTSB Aircraft Accident Reports 2022 · Accident report Loss of Control on Takeoff in Icing Conditions — Citation 560XL
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- 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.