As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - FLT 518 - AFTER TAKEOFF MIA, UNABLE TO RAISE LANDING GEAR IN EITHER HYDRAULIC SYSTEM 1 OR 2. RETURNED MIA AND LANDED WITHOUT INCIDENT. REPLACED INBOARD HARNESS RIGHT MAIN LANDING GEAR. INSTALLED NEW PROXIMITY DETECTORS ON RIGHT MAIN LANDING EAR. PERFORMED GEAR SWING OPERATION CHECKS NORMAL ON HYDRAULIC SYSTEM 1 AND 2 PER MM. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)