As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, LEFT MAIN GEAR DOOR DID NOT INDICATE CLOSED WHEN GEAR HANDLE WAS SELECTED UP (CLASS 1 ECAM, LEVEL 2). CYCLED GEAR PER ECAM AND DOOR CLOSED. FOUND LGCIU NR 1 ON ECAM. SWAPPED LGCIU NR 1 S/N 209 WITH LGCIU NR 2 S/N 230. CFDS BITE CHECKS GOOD ON BOTH LGCIUS. REMOVED AND REPLACED PROX SENSOR 9GA AND 11GA ON LT GEAR UPLOCK ACTUATOR.