As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SJU INFLIGHT T1635/07MAY - UPON GEAR EXTENSION CREW REPORTED AN INTERMITTENT UNSAFE INDICATION ON CENTER PANEL FOR NUMBER ONE SYSTEM FOR LEFT MAIN LANDING GEAR. LANDED SJU WITHOUT INCIDENT. REPLACED THE LEFT MAIN GEAR DOWN LOCK SENSOR AND RELAY FOR LEFT MAIN LANDING GEAR DOWN LOCK SYSTEM ONE. SYSTEM GROUND CHECKED NORMAL OPERATION.