NTSB CAROL · Event
Event FTW98LA262
Registry · N511M
FAA Aircraft Registry record.
Make / Model
ROLLADEN-SCHNEIDER LS-6
Seats / Engines
1 seats · 1 engine
ADS-B equipped
Yes — Mode-S A66639
Registrant of record
LEONARD STEVEN E
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The pilot's failure to maintain airspeed. Factor's were the unforecasted weather (tail wind) and the inadvertent stall/spin.
Factual narrative
On June 11, 1998, at 1215 mountain daylight time, a Rolladen-Schneider LS-6 glider, N511M, was substantially damaged after impacting terrain during landing at Green River Municipal Airport, Green River, Utah. The private pilot, the sole occupant onboard, was seriously injured. The glider was being operated by the owner under Title 14 CFR Part 91. Visual meteorological conditions prevailed for the local personal flight which had originated approximately 3 minutes before the accident. No flight plan was filed. According to the co-owner of the glider, the pilot was given an auto-tow launch from runway 13 (5,600 feet X 60 feet, elevation 4225 feet) and he believed that the pilot released at approximately 700 feet agl. The co-owner observed the glider circling southwest of the runway, losing altitude. The pilot stated that he encountered "heavy sink almost immediately after tow release." The co-owner further observed the glider fly over runway 13, but "was too high to land straight ahead." The pilot further reported that "he turned left to return to the runway and the glider began to rotate left." The pilot told the Investigator-In-Charge (IIC) that he "got the right rudder in and the rotation stopped within 90 degrees." The co-owner stated that "an apparent wind gust from above or behind caused the glider to nose down." The pilot stated that "just as the rotation stopped, the left wing tip impacted the ground." The glider came to rest facing approximately 220 degrees. The left wing and the tail section were substantially damaged. The canopy, flight deck, and instrument panel were destroyed. According to the co-owner of the glider, the pilot was given an auto-tow launch from the runway and he believed that the pilot released at approximately 700 feet agl. The co-owner observed the glider circling southwest of the runway, but was losing altitude. The pilot stated that he encountered 'heavy sink almost immediately after tow release.' The co-owner further observed the glider fly over the runway, but 'was too high too land straight ahead.' The pilot further reported that 'he turned left to return to the runway and the glider began to rotate left.' The pilot said that he 'got the right rudder in and the rotation stopped within 90 degrees.' The co-owner stated that 'an apparent wind gust from above or behind caused the glider to nose down.' The pilot stated that 'just as the rotation stopped, the left wing tip impacted the ground.' Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1998_FTW98LA262.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
Beyond the agency record
Search this event elsewhere.
Pre-filled searches into the sources where news + community discussion of aviation events lives. External sources are reported, not agency. Treat them as signal that something happened, not as fact about what happened.
Entity-clustered aviation events in the press — last 24 hr + 30-day archive.
Official agency record + docket.
Investigative docket: factual reports, photos, transcripts.
Long-running aviation incident database (Flight Safety Foundation).
Community NTSB synthesis blog — often has photos and witness reports.
Gold-standard aviation incident blog.
Aviation industry news search.
GA pilot forum — informed but rumor-prone.
GA pilot subreddit search.
Tail-number page — flight history (free tier limited).
AOPA Air Safety Institute search.
Mainstream press coverage. Recent events only.
Privacy-preserving news search.
External links open in a new tab. We don't ingest their content; we deep-link search queries.
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.
- NASA NTRS 2026 · Conference Paper
Computational Analysis of Steady State Aerodynamics of Transonic Truss-Braced Wing Configuration in Deep Stall
This study presents a computational investigation of steady state aerodynamics of the Subsonic Ultra-Green Aircraft Research (SUGAR) Transonic Truss-Braced Wing (TTBW) configuration over a wide range …
- arXiv 2023 · arXiv preprint
Automating Bird Diverter Installation through Multi-Aerial Robots and Signal Temporal Logic Specifications
This paper tackles the task assignment and trajectory generation problem for bird diverter installation using a fleet of multi-rotors.
- arXiv 2023 · arXiv preprint
Variation of Critical Crystallization Pressure for the Formation of Square Ice in Graphene Nanocapillaries
Two-dimensional square ice in graphene nanocapillaries at room temperature is a fascinating phenomenon and has been confirmed experimentally.
- arXiv 2023 · arXiv preprint
Polycrystallinity enhances stress build-up around ice
Damage caused by freezing wet, porous materials is a widespread problem, but is hard to predict or control. Here, we show that polycrystallinity makes a great difference to the stress build-up process…
- arXiv 2022 · arXiv preprint
Enhanced Prediction of Three-dimensional Finite Iced Wing Separated Flow Near Stall
Icing on three-dimensional wings causes severe flow separation near stall. Standard improved delayed detached eddy simulation (IDDES) is unable to correctly predict the separating reattaching flow due…
- Embry-Riddle Scholarly Commons 2021 · Journal article (JAAER)
Analysis on the Negative Emotional, Physiological, and Cognitive Responses Elicited from of the Activation of a Stall Alarm
Failing to identify an aerodynamic stall can lead to the inability of an aircraft to sustain flight. To warn pilots of an impending or fully-developed stall, many aircraft have safety devices installe…
Browse the full corpus — academia portal ↗