What was found
WHILE ON DEPARTURE & CLIMBING THROUGH FL190 THE FLIGHT CREW NOTED A LOUD BANG & VIBRATION, FOLLOWED BY A RED RT ENG EXCEEDANCE CAS MSG & THEN AN AMBER RT ENG VIBRATION MSG. THE PIC RETARDED THE RT ENG THROTTLE LEVER & THE VIBRATION DECREASED, BUT WHEN SLIGHTLY ADVANCED THE VIBRATION RETURNED, ALL OTHER ENG INDICATIONS APPEARED NORMAL. AS A PRECAUTION AN EMER WAS DECLARED & THE ACFT RETURNED FOR AN UNEVENTFUL LANDING. A CONTRACTED VENDOR R & R THE AFFECTED ENG, PN 3030001-4, WITH A RENTAL UNIT & UPON COMPLETION OF ADDITIONAL MX THE ACFT WILL BE RETURNED TO SERVICE. DURING ENG TEARDOWN IT WAS DISCOVERED THAT AN LPT 2 BLADE HAD SEPARATED AT THE BLADE DOVE TAIL, CONSEQUENTLY CAUSING THE LOUD BANG & VIBRATION THAT OCCURRED IN FLIGHT. AN ONGOING INVESTIGATION CONTINUES ON ENG SN P-118133 TO DETERMINE THE CAUSE.