As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GOUNDED: ECAM - LANDING GEAR DOOR NOT CLOSED. MAINTENANCE FOUND LEFT HAND MAIN LANDING GEAR DOOR UPLOCK SENSOR 27GA TARGET MISSING ATTACH SCREW AND INSTALLED IT PER AMM 32-31-00. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.