Regional Jet 900 (CRJ900)
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Troubleshooting
Aircraft Equipment Problem Less Severe
Flight Crew Overcame Equipment Problem; Flight Crew Returned To Departure Airport
Aircraft
Gear disagreed warning message; landing gear would not retract after takeoff. After departing Runway XXR at ZZZ; gear would not retract. Attempted several times; would not retract. Ran the QRH for gear disagree in the up position. Landing gear stayed down and locked throughout the entire event; hydraulic 3a & b pumps will working with 3;000 PSI in system. With gear handle down; gear disagree warning message. Extinguished; all gear down and locked in green; system normal. Contacted Maintenance; advised of situation; recommended return to ZZZ.
CRJ-900 Captain reported that the landing gear would not retract after takeoff; resulting in a return to the departure airport.