NTSB Identification: CEN10FA394
14 CFR Part 91: General Aviation
Accident occurred Tuesday, July 13, 2010 in St. Ignace, MI
Probable Cause Approval Date: 10/03/2011
Aircraft: BEECH 58, registration: N3081N
Injuries: 4 Fatal,1 Serious.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

Witnesses observed the airplane abort two takeoffs prior to the accident takeoff. During the second and third (accident) takeoff rolls, one engine did not sound like it was developing full power. In between the three takeoff attempts, the pilot did not perform an engine run-up. During the accident takeoff roll, one engine still did not sound like it was developing full power and the airplane rotated shortly before the end of the runway. The airplane briefly became airborne, with the wings rocking back and forth, and then impacted an interstate highway with its left wing, which was consistent with an aerodynamic stall. The airplane impacted a cable median barrier and a fire ensued. The airplane continued into a ditch, nosed over, and came to rest inverted. A postaccident examination of the airframe and engines revealed no anomalies that would have precluded normal operation.

The pilot had some moderate heart disease and sleep apnea that were documented in his medical records. Toxicology findings noted the use of an unreported medication (atenolol) that was taken at an undetermined time prior to the accident. Approximately 10 minutes prior to the accident flight, the pilot amended his instrument flight rules clearance with an air traffic controller via the airplane's radio. No problems with the pilot's conversation or speech were noted during the recorded transmissions, and the investigation could not conclusively determine whether the pilot's medical conditions or medication use were related to the accident.

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

The pilot's failure to maintain aircraft control during takeoff for undetermined reasons.

Full narrative available

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