SMT ENG FAILS AND IS SHUT DOWN.

Narrative

CRUISING AT 7000 FT MSL; JUST PRIOR TO BEING HANDED OFF FROM PVD APCH TO BOS APCH; MY CAPT AND I FELT A SURGE IN THE R ENG. SECONDS LATER; THERE WERE FLAMES COMING OUT OF THE EXHAUST STACKS OF THE R ENG. WE BOTH NOTICED A GLOW OUT THE R WINDOW; WHEN THE CAPT ASKED ME TO CONFIRM THE STATUS OF THE R ENG; I TOLD HIM THERE WERE FLAMES COMING OUT OF THE EXHAUST STACKS. THERE WERE NO INDICATIONS OF A FIRE BY THE ACFT'S FIRE DETECTION SYS INSIDE THE COCKPIT AT THIS TIME OR FOR THE REMAINDER OF THE FLT. NO EXTINGUISHER BOTTLES WERE DISCHARGED. THE CAPT NOTICED A DROP IN THE TORQUE AND N1 GAUGES AS THE ENG SHUT DOWN. WE PROCEEDED WITH THE 'IMMEDIATE ACTION' ITEMS OF AN ENG FIRE/FAILURE INFLT EMER. AFTER COMPLETING THESE ITEMS; THE ENG WAS SECURED AND THE FLAMES CEASED TO FLOW FROM THE EXHAUST STACKS. WE PROCEEDED WITH THE 'CLEAN-UP' CHKLIST WHICH WAS THEN ACTIONED. PVD APCH ASKED THE NATURE OF THE PROB. WE STATED THAT THE R ENG HAD FAILED AND IS SHUT DOWN. THEY REQUESTED THE NUMBER OF PERSONS ON BOARD AND FUEL REMAINING. WE WERE VECTORED IN FOR THE VISUAL APCH TO RWY 34 AND PROCEEDED WITH THE SINGLE ENG LNDG. FIRE TRUCKS; WHICH WERE NOT REQUESTED BY US; AWAITED OUR ARR. THE PAX WERE TOLD PRIOR TO LNDG OF THE SIT AND WE WERE MAKING A LNDG IN PVD; RI. RESULTS ON THE GND BY A MECH INDICATED THE PWR TURBINE SECTION OF THE ACFT ENG HAD SHATTERED AND SEIZED INFLT. NO OTHER FINDINGS WERE DETERMINED AT THAT TIME. WE WERE GIVEN TIMELY; PROFESSIONAL ASSISTANCE BY THE CTLRS AND PRIORITY LNDG INTO PVD.