aviation accident: PIPER PA-28R-201T near MONTICELLO (1991-10-20)
Probable cause: INADEQUATE MAINTENANCE/OVERHAUL OF THE ENGINE, AND SUBSEQUENT FAILURE OF THE #5 PISTON (HOLE BURNED IN PISTON), DUE TO PRE-IGNITION AND/OR DETONATION. ROUGH/UNEVEN TERRAIN IN THE EMERGENCY LANDING AREA WAS A RELATED FACTOR.