Primary finding
Probable cause
The pilot's poor planning/decision making. Related factors are the low ceilings and fog, the dark night, the pilot's inaccurate weather evaluation and diverted attention, and the pilot's failure to maintain clearance from the higher terrain encountered.
Investigator assessment
Analysis narrative
The pilot departed at night in instrument meteorological conditions without a flight plan. About ten minutes after takeoff, the pilot realized weather conditions were 'far poorer' than expected and the fog was hampering his vision. He chose to return to the departure airport, and was in a left hand turn when the airplane impacted trees. The pilot stated due to the poor weather his attention was diverted from navigation. The airplane had wandered several miles off course, into an area of higher terrain. A post-impact ground fire ensued.
Source record
Factual narrative
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