As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON DEPARTURE AN UPLOCK DISAGREE ECAM WAS GENERATED DURING GEAR RETRACTION. ECAM ACTIONS CARRIED OUT SUCCESSFULLY AND FAULT CLEARED. FOLLOWING CONSULTATION WITH MOC CREW WAS ADVISED TO RETURN TO DEPARTURE. LT MLG GEAR UPLOCK REPLACED IAW AMM 32-31-44-400-001-A.