NTSB Identification: CEN10LA046
14 CFR Part 91: General Aviation
Accident occurred Tuesday, November 10, 2009 in Siloam Springs, AR
Probable Cause Approval Date: 12/20/2010
Aircraft: Younkin J R Mullicoupe, registration: N273X
Injuries: 1 Serious.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

The pilot was performing aerobatics in an experimental airplane when the engine quit. The pilot attempted an emergency landing in a field but hit an unseen power line. The airplane lost control, impacted terrain and cartwheeled, causing substantial damage to the engine compartment, wings, aft fuselage and forward portion of upper cabin area. The pilot and the owner both told investigators that the engine quit due to fuel starvation to the engine caused by a vacuum created in the header tank. Investigators were unable to verify the configuration of the fuel system due to postaccident actions performed by the owner and the lack of information provided by the owner.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

A loss of engine power due to fuel starvation for undetermined reasons.

Full narrative available

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