Overview
An aircraft suffered a loss of power in its right engine during the takeoff roll, leading to an aborted takeoff. The airplane subsequently departed the runway and nosed over, ending up inverted off the end of the departure strip.
Events Prior to Takeoff
The aircraft had not been operated for several weeks prior to the incident. During that period, there were consecutive days of rain and high humidity. Before the attempted departure, the magnetos on the right engine were noted to be rough. However, after an extended run-up, the magneto roughness appeared to clear.
Takeoff Attempt and Abort
The takeoff was initiated, but during the takeoff run, the right engine began backfiring and subsequently lost power. The flight crew decided to abort the takeoff when the aircraft had reached approximately 85 miles per hour.
Accident Sequence
After the decision to abort, the aircraft was unable to stop within the remaining runway length. It ran off the departure end of the runway and nosed over, coming to rest inverted. No further details about the aircraft, occupants, or damage are specified in the available information.