Overview
An aircraft experienced a loss of engine power during a practice slow flight maneuver, leading to a forced landing during which the aircraft nosed over. The pilot was returning after picking up the aircraft from an annual inspection.
Sequence of Events
According to the pilot, he was practicing slow flight on the return flight. As the aircraft slowed to 90 mph during the slow flight, the pilot attempted to increase power, but the engine did not respond. The forced landing was initiated from an altitude of approximately 400 feet above ground level (AGL), with the engine operating at idle power.
Pilot Statement
The pilot stated that carburetor heat was not used during the power reduction in preparation for slow flight, nor during S-turn maneuvers performed earlier. The pilot also reported that the temperature was 62 degrees Fahrenheit and the dew point was 60 degrees Fahrenheit.
Investigation
No mechanical failures or malfunctions were discovered that would have resulted in the loss of power. The investigation did not identify a specific cause for the engine not responding to power increase attempts.