Primary finding
Probable cause
No probable cause available.
Investigator assessment
Analysis narrative
The plt reported that en route, the eng began to run rough. Reportedly, he applied carburetor heat, full rich mixture & full throttle, but was unable to significantly increase the power. He circled for a short time, then made an emergency landing. An exam of the eng revealed sooted spark plugs & oil fouling of the #2 & #4 lower spark plugs. No apparent mechanical failure or malfunction was verified. The temp & dew point were 87 & 67 deg, respectively. Damage had occurred during the landing roll when the acft encountered a gulley.
Source record
Factual narrative
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