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ASN Wikibase Occurrence # 139228
Last updated: 5 January 2021
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Type:Glaser-Dirks DG-1000S
Owner/operator:Northwest Eagle Soaring Llc
Registration: N7760A
C/n / msn: 10-34S33
Fatalities:Fatalities: 1 / Occupants: 1
Aircraft damage: Substantial
Location:Cle Elum Municipal Airport - S93, WA -   United States of America
Phase: Initial climb
Departure airport:Cle Elum, WA (S93)
Destination airport:Cle Elum, WA (S93)
Investigating agency: NTSB
Witnesses reported that the glider became airborne within the first one-third of the runway during an automobile ground launch. The glider then pitched to a steep nose-high attitude and ascended through about 100 to 125 feet when the rope broke. The glider continued to ascend and momentarily leveled off near the end of the runway. The glider then entered a steep right bank angle turn and descended, turning about 300 degrees from its initial departure heading before it impacted terrain.

Postaccident examination of the glider revealed no evidence of a malfunction or failure that would have precluded normal operation. The gliderís right turn and associated steep bank angle likely resulted in a significant loss of airspeed and subsequent aerodynamic stall at a low altitude, with insufficient altitude for the pilot to recover. It is also likely that the tow rope reached its maximum tensile load and broke as a result of the rapid pitch-up maneuver after takeoff. The reason for the rapid pitch up maneuver could not be determined.
Probable Cause: The pilotís failure to maintain airspeed and control after takeoff, which resulted in an aerodynamic stall.




Taken at the crash site, Cle Elum airport Oct 13, 2011

Revision history:

14-Oct-2011 05:04 RobertMB Added
14-Oct-2011 06:33 RobertMB Updated [Narrative]
14-Oct-2011 12:46 Alpine Flight Updated [Departure airport, Destination airport, Damage]
14-Oct-2011 14:41 RobertMB Updated [Time, Departure airport, Destination airport, Source, Damage]
17-Jun-2012 01:11 Anon. Updated [Source, Narrative]
26-Jun-2013 11:09 Alpine Flight Updated [Time, Aircraft type, Departure airport, Destination airport, Narrative]
21-Dec-2016 19:26 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
27-Nov-2017 17:21 ASN Update Bot Updated [Operator, Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative]

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