As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SJU - FLT 1600 - AFTER TAKEOFF SJU WHEN LANDING GEAR RETRACTED, LEFT MAIN LANDING GEAR WOULD NOT RETRACT. AIRCRAFT RETURNED TO SJU AND LANDED WITHOUT INCIDENT. REPLACED LEFT MAIN LANDING GEAR LEVELING CYLINDER (PITCH DAMPER) FOUND DAMAGED. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)