NTSB CAROL · Event
Event ERA21LA276
Registry · N2517H
FAA Aircraft Registry record.
Make / Model
SCHWEIZER SGS 1-26E
Year of manufacture
1976 · 45 years old at event
Seats / Engines
1 seats · 1 engine
Last airworthiness date
19760329
ADS-B equipped
Yes — Mode-S A25E8A
Registrant of record
CONNECTICUT SOARING ASSOCIATION INC
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The failure of the student to achieve the proper touchdown point resulting in landing undershoot.
Factual narrative
The student pilot was towed aloft and released at 3,000 ft above ground level (agl) two miles south of the airport. After practicing air-work south of the airport with no thermal activity, the flight encountered 2 episodes of significant sink (-1,000 ft/min). With a wind from the northwest at 8 knots, he proceeded for a straight-in approach to runway 36 (nearest runway). When the glider was on a 1-mile final for the runway, a 3rd episode of severe sink was encountered. Realizing he would be unable to reach the runway, the pilot executed a low-energy touchdown on the shoulder of a road about 800 ft from the runway threshold. Postaccident examination of the glider and the submitted NTSB Pilot/Operator Aircraft Accident/Incident report confirmed substantial damage to the left wing. The pilot recommended performing airwork upwind of the airport. 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).
- — Personnel issues-Action/decision-Info processing/decision-Decision making/judgment-Pilot
- — Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot
- — Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Descent/approach/glide path-Not attained/maintained
- — Environmental issues-Conditions/weather/phenomena-(general)-(general)-Effect on operation
Verbatim from NTSB's published report. Source file
NTSB_2021_ERA21LA276.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Related research
What the literature says.
Academic papers and agency reports matching this event's aircraft type or causal vocabulary (icing). 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 · Contractor Report (CR)
Icing Physics Studies Using the 3D SIDRM Test Article: 2023 Icing Tests Analysis
In-flight icing is an important safety issue and is a factor that affects aircraft design and performance. Newer regulations are driving a need for improvements in airframe and engine icing simulation…
- arXiv 2025 · arXiv preprint
Multi-Agent Deep Reinforcement Learning for UAV-Assisted 5G Network Slicing: A Comparative Study of MAPPO, MADDPG, and MADQN
The growing demand for robust, scalable wireless networks in the 5G-and-beyond era has led to the deployment of Unmanned Aerial Vehicles (UAVs) as mobile base stations to enhance coverage in dense urb…
- Embry-Riddle Scholarly Commons 2025 · Journal article (JAAER)
A Mathematical Model on the Temporal Dynamics of Aviation Competitive Pricing
This study investigates the competitive dynamics of airport pricing using U.S. airport data to validate the findings. It employs linear and nonlinear ordinary differential equation models to analyze t…
- NASA NTRS 2025 · Presentation
NASA Icing Update – March 2025
This NASA Icing Update was prepared for presentation to the SAE International AC-9C Inflight Icing Technology Committee. This update includes the following topics: planned Rotational Icing Scaling tes…
- arXiv 2024 · arXiv preprint
An energy-stable phase-field model for droplet icing simulations
A phase-field model for three-phase flows is established by combining the Navier-Stokes (NS) and the energy equations, with the Allen-Cahn (AC) and Cahn-Hilliard (CH) equations and is demonstrated ana…
- NASA NTRS 2024 · Presentation
NASA Icing Update – Oct 2024
This presentation provides a status update on select NASA icing research activities for the SAE AC-9C Icing Technical Committee Meeting on Oct 21, 2024.
Browse the full corpus — academia portal ↗