ALLEN STEEN SKYBOLT near Carrollton, GA — 2014-07-13
- Date
- 2014-07-13
- Location
- Carrollton, GA, USA
- Aircraft
- ALLEN STEEN SKYBOLT
- Registration
- N849CA
- Category
- Airplane
- Highest injury
- Fatal
- Fatalities
- 2
- Phase of flight
- Maneuvering
Probable cause
An in-flight loss of airplane control for reasons that could not be determined during postaccident examinations or based on the available evidence.
NTSB narrative
The pilot, who was the airplane owner, was on a local, pleasure flight. Witnesses observed the airplane flying low followed by a rapid pitch down or loss of airplane control. The airplane struck a tree about 60 ft above the ground and continued another 46 ft until it struck the ground. Most of the wreckage was consumed in a postaccident fire. Primary flight control continuity was confirmed from the control surfaces to the cockpit controls. All of the airplane's primary structural components were accounted for within the wreckage debris field. Several tree branches with smooth, angular cuts, indicative of contact with a propeller under power, were observed within the wreckage debris field. A disassembly and examination of the engine revealed no evidence of a preexisting mechanical malfunction or failure. A cable attachment bracket for the elevator trim tab was found fractured; however, examination of the fracture surface revealed overstress signatures, and no evidence of a preexisting anomaly was found. Thus, the fracture likely occurred during the impact sequence. The pilot, who had owned the airplane for about 15 years, only flew it occasionally, and his last logged flight in the accident airplane was more than 1 year before the accident flight. The pilot's autopsy and toxicology reports revealed no evidence of incapacitation.
Analysis
- Primary failure mode
- Loss of control
- First missed decision gate
- Pilot could have avoided low flight and maintained safer altitude.
NTSB coding
Evidence available
- Photos
- 29 docket documents
Docket documents29
- Release of Aircraft Wreckage NTSB Form 6120.15form
- FAA Inspector Statement – Moen with Witness Interviewsinterview
- FAA Inspector Statement – Van Lengeninterview
- Certification of Party Representativeother
- Excerpts – Aircraft Logbookother
- Excerpts – Engine Logbookother
- Excerpts – Pilot Logbookother
- Memorandum of Record – Carrollton, GA Weatherother
- Photo 1 – Initial Impact Pointphotos
- Photo 10 – Propeller and Spinnerphotos
- Photo 11 – Propeller Attachment Flangephotos
- Photo 12 – Elevator Trim Tab Connectionphotos
- Photo 13 – Engine Controlsphotos
- Photo 14 – Elevator Trim Tabphotos
- Photo 15 – Engine Carburetor, Disassembledphotos
- Photo 16 – Engine Carburetor, Disassembledphotos
- Photo 17 – Engine Spark Plugsphotos
- Photo 18 – Crankcase Disassembledphotos
- Photo 19 – Crankshaft and Connecting Rodsphotos
- Photo 2 – Example of Cut Tree Limbs Found Within Wreckage Debris Fieldphotos
- Photo 3 – Main Wreckagephotos
- Photo 4 – Aft Fuselage and Empennagephotos
- Photo 5 – Enginephotos
- Photo 6 – Enginephotos
- Photo 7 – Engine During Recoveryphotos
- Photo 8 – Cockpit Areaphotos
- Photo 9 – Wing Section Recovered from Treephotos
- Materials Laboratory Factual Reportreport
- Toxicology Reportreport
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