As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT CRUISE FLIGHT GOT A "BRAKE OVERHEAT" ALEART FOLLOWED BY "BRAKE TEMP DIFF". #1 BRAKE TEMP FLUCTUATED BETWEEN 200-700 DEG. EMERGENCY DECLARED WITH ATC. NO FIRE/SMOKE NOTED BY FIRE RESCUE OR REMOVED AND REPLACED #8 MLG BRAKE TEMP SENSOR IAW 32-46-01-2 OPS CHECK GOOD