Light Airplane Collides with Trees on Mountain Ridge During Foggy Conditions (N61899)

Accident Summary

The flight originated during early morning hours. The airplane was reported missing at 0930 and subsequently located atop a heavily wooded mountain ridge. A ground witness living near the accident site reported heavy fog in the vicinity during the early morning hours. Investigation revealed that the airplane collided with trees, then descended through the trees for approximately 420 feet until it struck the ground and came to rest inverted.

Investigation Findings

Examination of the airplane and engine revealed no evidence of a malfunction that would have contributed to the accident. Toxicology tests of the pilot's blood showed a low level (0.365 mcg/ml) of methamphetamine and 25 mg/dl ethanol. There was evidence that the ethanol was due to post-mortem production. A test of the pilot's urine showed 0.059 mcg/ml tetrahydrocannabinol carboxylic acid (inactive metabolite of marijuana), but none was detected in his blood.

Toxicology Findings

According to an FAA regional flight surgeon, the level of an inactive metabolite in the pilot's urine indicated that he had been under the influence of marijuana sometime in the past. Methamphetamine is a stimulant that is not approved by the FAA for use while operating an aircraft.