What was found
PASSING THROUGH 17,500 WE RECEIVED A L ENG OIL PRESS WARNING. AROUND 18,000 FEET WE RECEIVED N2 AND N1 VIB AND A LOUD EXTERIOR NOISE HEARD FROM COCKPIT. THE ENGINE QUICKLY DETERIORATED AND WE RAN THE L ENG FIRE OR SEVERE DAMAGE IN FLIGHT QRC AND SHUT DOWN THE LEFT ENGINE. WE COULD SMELL A BURNING FUMES SMELL AS WELL ONCE THE ENGINE VIB INDICATIONS WERE PRESENT. WE THEN RAN THE APPLICABLE QRH PROCEDURES AND PROCEEDED TO ATL AND COMPLETED A SINGLE ENGINE APPROACH TO LAND. FLIGHT 3518 FILED CLOSED PLEASE REFERENCE AML 376649 PLEASE REFERENCE AML 376684. RECONNECTED AND SECURED C-SUMP OIL-SCAVENGE HOSE IN REF TO CRJ 200 AMM. DOWNLOADED FDR IN REF TO CRJ 200 AMM. UPLOADED TO SKYWEST SERVER.