As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AT CRUISE 390 NOSE GEAR UNLOCK LIGHT ON GEAR PANEL ECAM WHEELS PAGE INDICATES NOSE GEAR DISAGREE AMBER LG- CTL- WENT AWAY AT 40001. REPLACED NOSE LANDING GEAR UP LOCK PROXIMITY SENSOR 12GA AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 32-31-73.