Regional Jet 200 ER/LR (CRJ200)
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Critical
Flight Crew Landed As Precaution; Flight Crew Landed in Emergency Condition; Flight Crew Diverted; Flight Crew Inflight Shutdown
Aircraft
At cruise FL330; EICAS displayed message - R REV UNLOCKED. The aircraft sound changed to a rumble and we were unable to maintain altitude. Captain was pilot flying and First Officer was pilot monitoring. We ran the QRC/ Immediate Action items for R REV UNLOCKED and advised ATC requesting a lower altitude. Another EICAS message was received for R ENG OIL PRESS. ITT displayed (red) over temp and the Right engine oil pressure gauge indicated 3 (red). We ran the QRH procedures for R ENG OIL PRESS and In-flight Engine Shutdown procedures as directed. ATC was advised that we would be landing single engine with over 30 souls onboard and 6700 lb of fuel. We also requested emergency service vehicles. Captain advised dispatch; flight attendant; and passengers about the situation. Single engine procedures from the QRH and Normal checklists were completed for descent and landing. Captain flew the single engine approach and landing without incident. Emergency vehicles met and examined aircraft exterior prior to taxi in to the gate.
CRJ-200 First Officer reported R REV UNLOCKED and R ENG OIL PRESS EICAS messages during cruise.  The flight crew shut down the engine and diverted to an alternate airport.