What was found
(CAN) EIR PT6A 2012-022, DURING CLIMBOUT THERE WAS A LOUD BANG AND THE ENGINE WAS SHUTDOWN. O/H CONFIRMED THAT THE ENGINE HAD SUFFERED A BEARING FAILURE. AFTER REMOVAL OF THE ACCESSORY GEARBOX ASSY IT WAS NOTICED THAT THE NR 1 BEARING WAS BROKEN CAUSING SECONDARY DAMAGE TO OTHER COMPONENTS AND CONTAMINATION OF THE OIL SYS WITH METAL PARTICLES. THE GAS GENERATOR SECTION AND POWER SECTION WERE DISASSEMBLED AS REQUIRED TO COMPLY WITH AN UNUSUAL OIL CONDITION PART B IAW THE OHM LIGHT O/H SECTION AND TO CLEAN AND REPAIR ALL THE REMAINING COMPONENTS.