As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - LEFT MAIN LANDING GEAR 'GREEN' POSITION LIGHT REPORTED INTERMITTENT WHEN GEAR SELECTED DOWN. MAINTENANCE FOUND GEAR INDICATION LIGHT SOCKET IN POSITION INDICATOR ASSEMBLY LOOSE. TIGHTENED SOCKET. NO OTHER DEFECTS NOTED WITH GEAR POSITION INDICATION SYSTEM. AIRCRAFT RETURNED TO SERVICE. (W)