ALAMOSA, CO, USA
N48DL
PIPER PA-28RT-201T
DURING FLT AT 16,000 FT, THE ENG LOST POWER & BEGAN VIBRATING. THE PLT CONTACTED ARTCC & ANNOUNCED HIS INTENTIONS TO MAKE A FORCED LANDING AT THE ALAMOSA ARPT. HOWEVER, HE WAS UNABLE TO REACH THE ARPT & SELECTED A FIELD ABOUT 1 MI AWAY.DURING THE LANDING, THE ACFT ENCTRD SVRL IRRIGATION DITCHES & THE GEAR COLLAPSED. AN EXAM REVEALED THE ENG CRANKSHAFT HAD FAILED AT THE #2 & #3 JOURNALS. THERE WAS EVIDENCE THAT THE #2 PIN HAD FAILED FROM FATIGUE, THEN THE #3 PIN FAILED FROM OVERLOAD.
FATIGUE FAILURE OF THE ENGINE CRANKSHAFT. A FACTOR RELATED TO THE ACCIDENT WAS: THE TERRAIN CONDITION IN THE EMERGENCY LANDING AREA.
Source: NTSB Aviation Accident Database
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