NTSB CAROL · Event
Event ERA21LA327
Registry · N373BA
FAA Aircraft Registry record.
Make / Model
LET L-23 SUPER BLANIK
Year of manufacture
2000 · 21 years old at event
Engine
NONE NONE
Seats / Engines
2 seats · 1 engine
Last airworthiness date
20000630
ADS-B equipped
Yes — Mode-S A43F0A
Registrant of record
GREATER BOSTON SORING CLUB
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The flight instructor’s lack of remedial action, which resulted in an aerodynamic stall in the landing flare and a hard landing.
Factual narrative
The flight instructor reported that student pilot was flying the glider as it approached to land with the air brakes in the fully extended position. As the student pilot attempted to flare, the glider pitched up and stalled several feet above the runway, resulting in a hard landing. During the hard landing, the glider sustained minor damage and the student pilot was not injured; however, the flight instructor was seriously injured. The flight instructor added that there were no preimpact mechanical malfunctions with the glider and he should have had his hands in close proximity to the controls to be ready to prevent any abrupt inputs and take control if required. 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-Action-Lack of action-Instructor/check pilot
- — Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Pitch control-Not attained/maintained
- — Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Angle of attack-Capability exceeded
Verbatim from NTSB's published report. Source file
NTSB_2021_ERA21LA327.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 (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 ↗