Regional Jet 700 ER/LR (CRJ700)
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Aircraft Equipment Problem Less Severe
Air Traffic Control Provided Assistance; Flight Crew Landed in Emergency Condition; Flight Crew Overcame Equipment Problem; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Returned To Departure Airport; General Flight Cancelled / Delayed
Aircraft
Aircraft never pressurized and we got cab alt red warning. We worked with Approach got a descent back to 5000 feet initially and later to 4000 before accepting vectors to land. We worked through the QRH competed checklist and set up for an ILS. Upon roll out we had an additional red oil press low for the right engine. We complied with the QRH for that and shut it down as well. We taxied to the gate without further incident.We received the red warning message and stopped the climb and worked a descent.Cause for Aircraft not pressurizing is unknown. Maintenance said later that the oil issue was a pressure transducer issue.We acknowledged the red warning message with each other. The Captain transfers control of the aircraft and he basically ran the QRH and informed the Flight Attendants and Passengers.
CRJ First Officer reported that the aircraft never pressurized. Upon roll out an additional engine red oil press low light came on.