A CANADAIR CL65 IN CLB AT 3500 FT DECLARED AN EMER AND DIVERTED DUE TO THE R ENG UNCONTAINED LOW PRESSURE TURBINE FAILURE.

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ON 02/WED/02 AT XA45; FLT XXX DEPARTED THE GATE AT ZZZ BOUND FOR ZZZ1. I WAS THE FO AND PERFORMED THE DUTIES OF PNF ON THIS FLT. WE TOOK OFF ON RWY 29 AT APPROX XA55 ON AN ASSIGNED HDG OF 130 DEGS AND ALT OF 3000 FT. MOMENTS AFTER REACHING OUR ASSIGNED ALT AND HDG; WE WERE GIVEN CLRNC TO CLB TO 13000 FT. THE CAPT BEGAN TO ADVANCE THE THRUST LEVERS AND INITIATED THE CLB. SHORTLY AFTER BEGINNING THE CLBOUT; AT APPROX 3500 FT; A VIBRATION WAS HEARD COMING FROM OUR R (#2) ENG. IMMEDIATELY FOLLOWING THE VIBRATION; A LOUD EXPLOSION TYPE NOISE CAME FROM THE SAME ENG AND WE IMMEDIATELY LOST THE THRUST FROM THE R ENG. I NOTED THAT THE ENG INDICATIONS IMMEDIATELY WENT OUTSIDE OF NORMAL LIMITATIONS AND THE ACFT YAWED. THE CAPT WAS ABLE TO MAINTAIN CTL OF THE ACFT WITHOUT INCIDENT/PROB AND CALLED FOR OUR MEMORY ITEMS TO BE PERFORMED FOR THE EMER CHKLIST FOR ENG FIRE/SEVERE ENG DAMAGE INFLT. I COMPLETED THE CHKLIST AND THE CAPT THEN HAD THE FLT ATTENDANT NOTIFIED OF OUR ENG LOSS AND THAT WE WOULD RETURN THE ACFT TO THE DEP ARPT. I THEN COMPLETED THE APPROPRIATE EMER CHKLIST WHILE THE CAPT FLEW THE ACFT; DECLARED AN EMER WITH ATC; AND COORD OUR RETURN TO THE DEP ARPT. UPON MY COMPLETION OF THE REQUIRED EMER CHKLIST; WE LANDED AT ZZZ WITHOUT FURTHER INCIDENT. UPON LNDG; THE CFR VEHICLES INSPECTED OUR ACFT FOR FIRE/DANGEROUS CONDITIONS ON THE RWY (RWY 29). ONCE THE CFR PERSONNEL COMPLETED THEIR INSPECTION; WE REQUESTED AND WERE APPROVED TO RETURN TO OUR GATE; SINCE THERE WAS NO APPARENT DANGER TO THE ACFT OR PEOPLE/CREW ON BOARD. DURING TAXI BACK TO THE GATE; I CALLED THE STATION PERSONNEL TO INFORM/COORD OUR RETURN AND HAVE THEM NOTIFY DISPATCH/OPS OF OUR SIT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED AFTER PUSHING THE THRUST LEVERS FORWARD A VIBRATION WAS NOTED THEN THE EXPLOSION NOISE. THE AIRPLANE YAWED AND THE ENG INDICATIONS DROPPED TO ZERO. THE RPTR SAID THE AIRPLANE WAS FLOWN BY THE CAPT AND WAS MANAGEABLE. THE RPTR STATED WHEN INSPECTED ON THE GND THE REAR OF THE ENG WAS FOUND EXTENSIVELY DAMAGED AND THE HORIZ STABILIZER HAD A HOLE IN THE LEADING EDGE. CALLBACK CONVERSATION WITH RPTR ACN 539644 REVEALED THE FOLLOWING INFO: THE RPTR STATED THE ENG FAILURE WAS CAUSED BY FAILURE OF THE LOW PRESSURE TURBINE AND WAS UNCONTAINED. THE RPTR SAID THE HORIZ STABILIZER HAD A HOLE IN THE LEADING EDGE ABOUT THE SIZE OF A GOLF BALL.