As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURNED & ACFT WAS GNDED. SHORTLY AFTER TAKEOFF, FLIGHT CREW REPORTED A LGCIU NR 1 ECAM MSG & RETURNED WHERE THE ACFT LANDED SAFELY. REPLACED THE RT MLG DOOR UPLOCK PROXIMITY SENSOR 26GA. ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK IAW AMM 32-31-73-400-001-A & 32-69-00-740-001-A.