What was found
(AUS) MAIN ROTOR TRANSMISSION PNO 47-620-600-27 MAIN DRIVE FLANGE SHEARBOLTS PNO 047-620-485-009 SHEARED - DAMAGE TO MAIN ROTOR SWASHPLATE AND CONTROL RODS - TAIL ROTOR DRIVE SHAFT FAILED AT FORWARD HANGER BEARING - INSPECTION FOUND THAT THE ROLLER BEARINGS PNO 47-620-532-1 IN THE FREEWHEEL UNIT PNO 47-620-536-7 WERE UNDERSIZE WITH THE CLUTCH DRUM BEING BEING UNEVENLY WORN ANDMATCHING WEAR ON THE BRAKE SHOES - SUSPECT FAILURE CAUSED BY SLIPPING OF THE FREEWHEEL UNIT DURING FLIGHT CAUSING A RAPID `POWER ON/POWER OFF' CONDITION TO BE APPLIED TO THE MAIN ROTOR WHICH WOULD BE FELT BY THE FLANGE DRIVE SHEAR BOLTS CAUSING EVENTUAL FAILURE - SEE MDR 96/0433 FOR SIMILAR OCCURRENCE