As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA INFLIGHT T2217/27 - AFTER TAKEOFF GEAR WOULD NOT RETRACT. HANDLE WOULD NOT GO INTO THE UP POSITION FROM NEUTRAL. RETURNED TO MIA AND LANDED WITHOUT INCIDENT. FOUND SENSOR 9GA BOGIE BEAN PROXIMITY DETECTOR SYSTEM 1 AT FAULT. REPLACED SENSOR 9GA AND PROXIMITY BOX. SYSTEM GROUND CHECKED NORMAL OPERATION.