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ASN Wikibase Occurrence # 233432
Last updated: 7 September 2021
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Type:Silhouette image of generic ll23 model; specific model in this crash may look slightly different
LET L-23 Super Blanik
Owner/operator:Huntsville Soaring Club
Registration: N296BA
MSN: 948117
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Substantial
Location:Moontown Airport (3M5), AL -   United States of America
Phase: Landing
Departure airport:Huntsville, AL (3M5)
Destination airport:Huntsville, AL (3M5)
Investigating agency: NTSB
According to the glider pilot, the purpose of the flight was to release from the tow about 300 ft above ground level, return to the airport, and land on the departure runway in the opposite direction, which would simulate the response to a "rope-break" emergency during the initial climb. After departure from the runway and release from the tow, the pilot completed a 270 turn on the north side of the runway and had to make another 90, left base-to-final turn to return toward the runway. While still on the base leg, the glider encountered an 11-knot wind from the south, gusting to 18 knots. The pilot believed that the glider must have encountered "wind shear" as he "lost all elevator control," and the glider then impacted terrain. The Federal Aviation Administration inspector who conducted a postaccident examination of the glider reported that he established flight control continuity. The pilot reported that there were no preaccident mechanical malfunctions or failures with the glider that would have precluded normal operation.

Probable Cause: The pilot's failure to maintain glider control and his exceedance of the glider's critical angle of attack while maneuvering in gusting wind conditions, which resulted in an aerodynamic stall.


FAA register:

Accident investigation:
Investigating agency: NTSB
Status: Investigation completed
Duration: 4 months
Download report: Final report


Revision history:

02-Mar-2020 05:21 Captain Adam Added
02-Mar-2020 15:20 RobertMB Updated [Time, Aircraft type, Registration, Cn, Operator, Source, Narrative]
03-Mar-2020 02:40 RobertMB Updated [Source]
03-Mar-2020 12:13 Iceman 29 Updated [Phase, Source, Embed code]
03-Jul-2020 12:38 ASN Update Bot Updated [Time, Operator, Departure airport, Destination airport, Source, Narrative, Accident report, ]

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