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Atlas / NTSB / CEN25LA311

NTSB CAROL · Event

Event CEN25LA311

2025-08-06 Monee, Illinois, United States Airport · C56 None 1 aircraft Status: Completed

Registry · N65818

FAA Aircraft Registry record.

Make / Model

SCHWEIZER SGS 2-33A

Year of manufacture

1973 · 52 years old at event

Engine

NONE NONE

Seats / Engines

2 seats · 1 engine

Last airworthiness date

19731010

ADS-B equipped

Yes — Mode-S A8AD0E

Registrant of record

HELGERSEN WILLIAM A SR

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The student pilot’s failure to maintain airspeed and altitude resulting in a collision with the ground during the base to final turn.

Factual narrative

The solo student pilot reported she was on downwind to land and noted she was a bit lower than usual so she turned base early to compensate. While on the base leg her recollection of events wasn’t clear. She remembered feeling task saturated and that she may not have maintained her altitude and airspeed resulting in the glider impacting the ground during the base to final turn. The glider came to rest upright on a flat grass field and the pilot was able to egress without further incident. The fuselage and right wing were substantially damaged. The pilot reported there were no preimpact mechanical malfunctions of failures with the glider that would have precluded normal operation. The pilot further reported that the accident could have been prevented by paying closer attention to the glider’s altitude and airspeed while in the traffic pattern. 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-Task performance-Use of equip/info-Aircraft control-Pilot

Verbatim from NTSB's published report. Source file NTSB_2025_CEN25LA311.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.