Accident Glasair Sportsman 2+2 N209TP,
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ASN Wikibase Occurrence # 59603
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Date:Friday 17 April 2009
Type:Silhouette image of generic GLST model; specific model in this crash may look slightly different    
Glasair Sportsman 2+2
Registration: N209TP
MSN: 7297
Engine model:Lycoming IO-390
Fatalities:Fatalities: 1 / Occupants: 1
Aircraft damage: Destroyed
Location:El Dorado Hills, California -   United States of America
Phase: En route
Departure airport:Rancho Marieta, CA (RIU)
Destination airport:
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
Witnesses monitoring the accident flight's departure airport common traffic advisory frequency reported that they heard a mayday radio transmission stating that "I've lost elevator control" and "I'm going down in some trees." Witnesses adjacent to the accident site reported hearing a loud whining noise followed by the sound of something impacting trees. One witness stated that the airplane was at a low altitude in an upright attitude when it struck trees. The airplane subsequently impacted terrain and came to rest near a residential structure where a post-crash fire consumed most of the fuselage. Post-accident examination of the wreckage revealed that the elevator torque tube was disconnected from the forward rod end bearing. The forward rod end bearing remained attached to the elevator bell crank assembly. No damage was observed on the forward torque tube rod end threads or forward rod end bearing threads. The forward torque tube rod end jam nut was observed threaded about one-half inch from the threaded rod end. The aft torque tube jam nut and torque tube rod end was observed against the aft rod end bearing. The aft torque tube rod end was slightly bent and did not allow movement. No evidence of "torque seal" was observed on the forward or aft jam nuts, rod end bearings, or torque tube assembly. No additional mechanical anomalies were noted with the recovered airframe.
Probable Cause: The in-flight separation of the elevator control torque tube rod end bearing from the elevator torque tube as a result of incorrectly tightened rod end bearing lock nuts.

Accident investigation:
Investigating agency: NTSB
Report number: WPR09LA202
Status: Investigation completed
Duration: 1 year
Download report: Final report




Revision history:

17-Apr-2009 23:16 slowkid Added
01-Jan-2010 07:33 harro Updated [Departure airport, Source]
14-Sep-2016 12:03 Anon. Updated [Narrative]
14-Sep-2016 12:03 harro Updated [Narrative]
21-Dec-2016 19:25 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
01-Dec-2017 18:55 ASN Update Bot Updated [Operator, Other fatalities, Departure airport, Source, Narrative]

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