NTSB Identification: CEN10FA424
Nonscheduled 14 CFR Part 91: General Aviation
Accident occurred Thursday, July 22, 2010 in Kingfisher, OK
Probable Cause Approval Date: 07/18/2013
Aircraft: EUROCOPTER AS 350 B2, registration: N918EM
Injuries: 2 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.

The surviving paramedic reported that while en route to the destination hospital to pick up a patient, a conversation began about flying on a coyote hunt. The pilot abruptly began a low-level maneuver in an attempt to demonstrate a coyote hunt flight. As the pilot maneuvered at low level, the helicopter and main rotor blades impacted trees and then terrain. An examination of the airframe and engine did not reveal any preimpact malfunctions or failures that would have precluded normal operation. Toxicological testing performed on specimens from the pilot detected the presence of numerous medications, including hydrocodone (a prescription narcotic for pain treatment), diazempam (a prescription medication with sedative effects) and chlorpheniramine (an over-the-counter sedating antihistamine). It is likely that these medications would have impaired the pilot’s judgment and ability to maintain control of the helicopter. A review of the pilot’s medical history found medical treatment for several conditions that were not reported to the Federal Aviation Administration, the certificate holder, or the operator.

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

The pilot’s impaired judgment, due to medications, which led to an abrupt low-level maneuver and subsequent impact with trees and terrain.

Full narrative available

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