ASN Wikibase Occurrence # 139228
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information.
If you feel this information is incomplete or incorrect, you can submit corrected information.
| Date: | Thursday 13 October 2011 |
| Time: | 15:58 |
| Type: | Glaser-Dirks DG-1000S |
| Owner/operator: | Northwest Eagle Soaring Llc |
| Registration: | N7760A |
| MSN: | 10-34S33 |
| Total airframe hrs: | 764 hours |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Cle Elum Municipal Airport - S93, WA -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Unknown |
| Departure airport: | Cle Elum, WA (S93) |
| Cle Elum, WA (S93) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
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 glider’s 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 pilot’s failure to maintain airspeed and control after takeoff, which resulted in an aerodynamic stall.
Accident investigation:
 |
|
Sources:
NTSB
Location
Images:
Taken at the crash site, Cle Elum airport Oct 13, 2011
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 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] |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation