What happened
The pilot reported that the engine had experienced intermittent failures three times over the preceding two weeks. The purpose of this flight was to verify that the engine was functioning correctly after those previous issues. During the takeoff roll, the aircraft lost power at an altitude of approximately 100 feet above ground level. The pilot attempted to turn and land on the southwest portion of the airport. However, a wing dragged along the ground before the aircraft came to rest.
The investigation
A teardown of the carburetor revealed that there was a foreign object lodged in the main fuel jet. This obstruction prevented proper fuel flow, leading to the loss of power during the critical takeoff phase.
Findings
The pilot stated that the engine had quit three times in the past two weeks. The purpose of the flight was to ensure that the engine was working properly. During takeoff, it lost power at about 100 feet AGL. The pilot tried to turn and land on the southwest part of the airport. However, a wing dragged the ground and the aircraft crashed. A teardown of the carburetor revealed that there was a foreign object in the main fuel jet.
Safety message
Regular inspection of fuel systems is critical to prevent foreign object damage that can lead to engine failure.