As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW INITIATED A GO AROUND AT A SPEED OF 200 KTS. GEAR DID NOT RETRACT. CYCLED GEAR DOWN & HAD THREE GREEN INDICATION ON LG PAGE & LOWER ECAM. ECAM SHOWED LG NOT UPLOCKED. AFTER LANDING, AN ADDITIONAL ECAM LG SYS DISAGREE APPEARED. REPLACED NLG PROX SENSOR 24 GA. REPLACED FLIGHT GND SENSING MECHANISM CASING & TARGET SUPPORT ASSEMBLY IAW MM 32-21-45. GEAR EXTENSION & RETRACTION OPERATIONS CHECKED GOOD IAW MM 32-31-00-720-002.