What was found
AFTER DEPARTURE DURING CLIMB, RECEIVED AN ECAM FOR HOT BRAKE NR 6. LEVELED AT FL250, SLOWED BELOW GEAR SPEED. TEMPERATURE WENT FROM 300 DEGREES. 305 , 310, AND 315, 320 DEGREES BY THE TIME ACFT WAS SLOW ENOUGH TO PULL GEAR DOWN TO COOL. DIVERTED. THE NR 6 INDICATIED ZERO DEGRESS BY APPROACH. ON ROLL OUT WITH NO BRAKE USED, THE NR 6 TEMP EVENTUALLY REACHED 395 DEGREES. FOUND THE NR 6 BRAKE UNIT SEIZED. COULD NOT GET IT TO RELEASE. REMOVED AND REPLACED THE NR 6 BRAKE UNIT IAW MM 32-42-2704. OK FOR SERVICE.