What was found
(CAN) DURING CLIMB AT FL90, THE NR 2 ENGINE NP SPEED REACHED 101 PERCENT WITH A PROPELLER ELECTRONIC CONTROL (PEC) FAULT. THE CREW REPORTED THAT ALL ENGINE PARAMETERS DECREASED FOLLOWING A PEC RESET AND THE ENGINE SHUTDOWN BY ITSELF. PILOT ELECTED TO RETURN TO ORIGIN AND PERFORMED A SINGLE ENGINE LANDING DURING WHICH 1 TIRE BURST AND ANOTHER DEFLATED. EXAMINATION OF NR 2 ENGINE FOUND FRACTURED TURBINE BLADES. MFG WILL INVESTIGATE TO ESTABLISH ROOT CAUSE AND SUPPLEMENT THE REPORT ONCE THE INFORMATION IS AVAILABLE. (TC 20100216005)