Accident Narrative
The pilot reported that during preflight inspection, the airplane had approximately 23 gallons of 100LL fuel in the main fuel tanks and no water was detected. An engine run-up performed before takeoff showed no discrepancies. After applying full power for takeoff, the pilot noted that the takeoff roll seemed slow, which he attributed to the warm day and medium height grass. The airplane cleared two tall trees at the departure end of the runway, after which the engine rpm dropped from 2,200 to 2,100. While descending, the airplane collided with trees and then the ground.
Postaccident Examination
Examination of the airplane revealed that the fuel selector was positioned to "main." No evidence of water contamination was found, and a total of 13 gallons of fuel were drained from the left main fuel tank. No fuel was found in the right main fuel tank. The mechanic who performed the postaccident fuel system inspection believed that fuel from the right main fuel tank drained into the left main fuel tank due to the resting position of the airplane. No obstructions were noted in the fuel delivery or vent system. Examination of the engine showed no evidence of preimpact failure or malfunction.
Findings
No determination was made as to the reason for the reported loss of engine power.