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NTSB investigation record

CEN14CA280

Completed

Schempp-hirth Nimbus3/24.5· N245AB

Date
June 6, 2014
Location
Wallis, TX
Conditions
VMC
Record
Published September 25, 2020

Primary finding

Probable cause

The pilot's failure to maintain direction control of the glider during takeoff in gusty wind conditions.

Investigator assessment

Analysis narrative

The glider pilot reported that he was to be towed by a tow plane and make a "no assist launch." The glider's wings were loosely supported by wing stands and the tow rope was attached from the tow plane to the glider. When the slack was out of the tow rope, the glider pilot made a radio call "Go, go, go" to the tow pilot. The glider began to lift off from the grass runway when pilot noticed that the tow plane moved left laterally from what he assumed was a gust of wind. The tow pilot corrected back to the right and the glider pilot readied to do the same. When the glider entered the area of suspected wind gust, it suddenly ascended about 8 feet and the left wing lifted. The pilot applied full left aileron and left rudder and forward pressure on the control stick in order to descend and regain the correct flight path. The left wing continued to lift so the glider pilot released the tow rope as the glider made a 30 degree right turn. The glider exited the area of suspected wind gust and the glider pilot was unable to maintain directional control and the glider impacted the runway. The glider sustained substantial damage to the rear fuselage and empennage. He also reported that there were no mechanical malfunctions or failures with the glider that would have precluded normal operation.

Source record

Factual narrative

The glider pilot reported that he was to be towed by a tow plane and make a "no assist launch." The glider's wings were loosely supported by wing stands and the tow rope was attached from the tow plane to the glider. When the slack was out of the tow rope, the glider pilot made a radio call "Go, go, go" to the tow pilot. The glider began to lift off from the grass runway when pilot noticed that the tow plane moved left laterally from what he assumed was a gust of wind. The tow pilot corrected back to the right and the glider pilot readied to do the same. When the glider entered the area of suspected wind gust, it suddenly ascended about 8 feet and the left wing lifted. The pilot applied full left aileron and left rudder and forward pressure on the control stick in order to descend and regain the correct flight path. The left wing continued to lift so the glider pilot released the tow rope as the glider made a 30 degree right turn. The glider exited the area of suspected wind gust and the glider pilot was unable to maintain directional control and the glider impacted the runway. The glider sustained substantial damage to the rear fuselage and empennage. He also reported that there were no mechanical malfunctions or failures with the glider that would have precluded normal operation.

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