Incident Details
During cruise flight, the pilot noticed the right engine cylinder head temperature (CHT) rising above 350 degrees and the oil temperature climbing above the top of the green arc. The pilot secured the engine and informed air traffic control that he needed to land at an alternate airport. Controllers repeatedly provided the location and distance to the nearest airport. The pilot reported that he was looking for the airport but was unable to control the airplane. He did not locate the airport and executed a precautionary landing to a muddy field. Neither propeller was found in the feathered position.
Investigation Findings
FAA inspectors examined the flight and engine controls and found no anomalies. Both engines were test run at 1,500 rpm at the accident site and subsequently in a test cell at various power settings for two hours with no anomalies noted. The CHT gauge was examined by the airframe manufacturer and no anomalies were found. Continuity was confirmed for the wiring from the right CHT probe to the CHT gauge.
Toxicology Report
Toxicological testing of the pilot revealed 2.296 ug/ml nefazodone (an antidepressant) detected in serum. The pilot's medical records indicated routine use of nefazodone as well as alprazolam (a tranquilizer) and zolpidem (a medication for insomnia). All three medications have potential effects on performance. FAA medical records showed that the pilot did not report the use of these drugs on his most recent medical application. The FAA considers these drugs disqualifying for issuance of a medical certificate.