CL65 IN CLB AT FL210 DECLARED AN EMER AND DIVERTED DUE TO LOSS OF #2 ENG OIL PRESSURE CAUSED BY A FAILED OIL PUMP.

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CLBING OUT OF CVG WE RECEIVED A R ENG OIL PRESSURE WARNING. RAN THE QRH PROC. AT LOW PWR SETTINGS THE WARNING CLRED. TALKED TO DISPATCH AND MAINT CTL. WE ELECTED TO TURN BACK TO CVG. PAX AND FLT ATTENDANT WERE NOTIFIED THAT WE HAD AN ENG INDICATION OUT OF NORMAL PARAMETERS AND WERE RETURNING TO CVG. WE DECLARED AN EMER. CVG APCH CLRED US FOR A VISUAL. AT IDLE PWR THE R ENG OIL PRESSURE WARNING RETURNED. RAN THE QRH PROC AGAIN; THE OIL PRESSURE WARNING REMAINED. SO AS PER THE QRH SINGLE ENG PROC; THE #2 ENG WAS SHUT DOWN. NOTIFIED ATC OF SINGLE ENG APCH. ON BASE TO FINAL; THE FLT ATTENDANT NOTIFIED US THAT THERE MIGHT BE SMOKE IN THE CABIN. WE REQUESTED HE CHK FOR LOCATION OF SMOKE AND IF THERE WAS ANY ODOR. HE PROMPTLY CALLED BACK TO SAY THERE WAS SMOKE NEAR THE FLOOR; BUT NO ODOR. WE LANDED UNEVENTFULLY; CONFIRMED THE SMOKE WAS AIR CONDITIONING AND TAXIED TO THE GATE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED WHEN ON THE GND WHEN THE COWLING WAS OPENED; THEN ENG WAS COVERED WITH OIL. THE RPTR SAID THE LOSS OF OIL PRESSURE AND QTY WAS CAUSED BY A MAIN OIL PUMP FAILURE OR THE OIL LINE CONNECTION AT THE MAIN OIL PUMP.