What was found
TURBO OVERHAULED 12-7-92, PLACED IN SERVICE 5-17-96. AFTER TWENTY HOURS IN SERVICE, REPORTED INCREASED VIBRATION LEVEL, FOLLOWED BY MANIFOLD PRESSURE REDUCTION, THEN BY ENGINE COMPARMTENT FIRE. FOUND TURBOSHAFT SHEARED, COMPRESSOR AND TURBINE WHEELS DAMAGED. ALL ATTACHING HARDWARE HAD SHAKEN LOOSE FROM TURBO, ALL SAFETY PLATES, LOCK WASHERS, ETC., FOUND IN PLACE.