As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - DURING CLIMBOUT UNABLE TO RETRACT LANDING GEAR. RETURNED TO MIA AND LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE FOR REPAIRS. REPLACED LANDING GEAR CONTROL LEVEL MODULE AND PROXIMITY SENSOR ELECTRONICS UNIT. SYSTEM GROUND CHECKED NORMAL OPERATION.