As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT GEAR DOOR LIGHT ON AT BOTH PANELS. VISUALLY CONFIRMED DOOR OPEN. RETURNED TO SFO. *S/D* LEFT MAIN LANDING GEAR DOOR ACTUATOR EYEBOLT ASSEMBLY WAS FOUND SEPARATED FROM THE ACTUATOR PISTON ASSEMBLY. THE DOOR ACTUATOR WAS REPLACED. OPERATIONAL CHECK WAS PERFORMED SATISFACTORILY.