No fatalities

SCHLEICHER ASK21 NO SERIES accident at Hinckley, IL, 29 Sept 2020

Hinckley, IL, United States

On September 29, 2020, a SCHLEICHER ASK21 NO SERIES operated by Windy City Soaring Association was involved in an aviation accident near Hinckley, IL. No fatalities were reported. Investigators recorded the probable cause as: The pilot’s improper control input during a bounced landing that resulted in the glider impacting terrain. This summary draws on records from NTSB; 1 related events involving the same aircraft type or operator are linked below.

SourcesNTSBPrimary reportUpdated 2026-08-03Data APIEditorial standards

Probable cause

The pilot’s improper control input during a bounced landing that resulted in the glider impacting terrain.

— NTSB Determination

Contributing factors

Incorrect use/operationPilot