Cessna 140A N5351C accident near Newark, California

Probable cause

A loss of engine power due to water contamination in the fuel system as a result of the pilot’s inadequate preflight inspection to identify and remove the water.

NTSB analysis

The pilot reported that he had just purchased the airplane. Prior to the flight, he completed a preflight inspection, which included filling the fuel tanks and then draining the fuel sump points and looking for water. During the initial climb after takeoff, the engine lost power and the pilot made a forced landing. During the landing roll, the airplane nosed over. A postaccident engine examination found water in the carburetor bowl. The estimated quantity of water was about 3/4 ounce. Evidence of water was also found in the gascolator. At the conclusion of the engine examination, no evidence of a preimpact mechanical malfunction or failure was found that would have precluded normal operation.

Text from the NTSB. Open the NTSB docket for WPR11LA150 for the full record.