As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ASH FLT 7064 ORD-GRB - CREW REPORTED DURING CLIMB OUT OF ORD, WHEN THE LANDING GEAR WAS SELECTED TO THE UP POSITION, "GEAR DISAGREE" WARNING MESSAGE OCCURRED. CREW DID NOTE THE RT MLG INDICATION ON THE LANDING GEAR SELECT PANEL WAS RED. CREW FOLLOWED THE QRH AND ELECTED TO RETURN TO ORD. CREW DECLARED AN EMERGENCY. AIRCRAFT LANDED SAFELY AND TAXIED TO THE GATE WITHOUT FURTHER INCIDENT. MX R2 NR 3 HYD RESERVOIR.