ASN Wikibase Occurrence # 261320
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| Date: | Sunday 16 May 2021 |
| Time: | 13:00 LT |
| Type: | ICA Brasov IS-28B2 |
| Owner/operator: | Sky Soaring Inc |
| Registration: | N41CR |
| MSN: | 71 |
| Year of manufacture: | 1977 |
| Total airframe hrs: | 1553 hours |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Hampshire, Kane County, IL -
 United States of America
|
| Phase: | Landing |
| Nature: | Training |
| Departure airport: | Hampshire, IL (55LL) |
| Hampshire, IL | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The flight instructor of the instructional glider flight reported that during a winch launch with the student pilot, the glider accelerated to 70 kts exceeding the winch launch speed. As the flight instructor attempted to decrease the airspeed to the normal winch launch speed, the weak/safety link broke and the glider separated from the towing cable. The flight instructor attempted to maneuver the glider for a landing back to the runway; however, during the turn to enter the final approach, the glider's critical angle of attack was exceeded, and the glider entered an aerodynamic stall/spin. The glider impacted trees and terrain coming to rest on a grass field. The glider sustained substantial damage to the fuselage and to both wings. The flight instructor reported that there were no preaccident mechanical failures or malfunctions with the glider that would have precluded normal operation. The flight instructor also reported that he should have maintained sufficient airspeed to prevent a 'stall/spin' at a low altitude.
Probable Cause: The flight instructor's failure to maintain aircraft control resulting in the exceedance of the glider's critical angle of attack following the breakage of the weak/safety link during a winch launch, which resulted in an aerodynamic stall and spin, and subsequent impact with trees and terrain.
Accident investigation:
 |
|
Sources:
NTSB CEN21LA226
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 17-May-2021 07:23 | Captain Adam | Added |
| 17-May-2021 14:04 | harro | Updated [Aircraft type, Registration, Cn, Operator, Source] |
| 06-Jul-2022 06:21 | ASN Update Bot | Updated [Time, Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
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