Introduction
A private pilot was conducting a night solo training flight in the local area. The flight involved several stop-and-go landings before the pilot began the return to her home airport.
Flight and Engine Failure
While cruising at 6,300 feet MSL, the engine suddenly quit. The pilot attempted to restart the engine but was unsuccessful.
Forced Landing
The pilot executed a forced landing onto a plowed field. Upon touchdown, the nose gear dug into the soft terrain, causing it to collapse. The aircraft subsequently nosed over.
Post-Accident Inspection
A post-accident engine inspection revealed no evidence to explain the reported engine failure. During a post-accident engine run, the engine operated to 2,200 RPM without any problems being noted. After four engine runs, some debris was removed from the carburetor, and the bottom four spark plugs showed some leading.