Engine Power Loss
Shortly after takeoff, while climbing through 350 feet, the engine rpm dropped to between 1500 and 1600 and remained there. The pilot was unable to maintain altitude while attempting to return to the airport. The aircraft collided with trees and subsequently the ground.
Preflight and Ground Checks
The pilot reported performing a preflight inspection and engine runup prior to departure with no problems noted. However, a passenger stated that the engine rpm was fluctuating during the ground check. Witnesses observed that the engine did not appear to be developing full power at departure.
Post-Crash Examination
Examination of the engine after the accident revealed that the carburetor discharge nozzle was plugged by contaminants. Additionally, the carburetor heat and mixture control cables were disconnected. An engine run showed that the left magneto was improperly timed and all leads of the right magneto were shorted. The last annual inspection had been performed on September 24, 1986.