As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOSS BRAKES DURING TAXI, ONLY PARKING BRAKE WORKS. BRAKES APPEAR TO BE FROZEN. INSPECTED BRAKES FOUND NO DISCREPANCIES, PERFORMED OPS CK OF PARKING BRAKE AND ALL CHECKS GOOD IAW MM 32-40. SUSPECT TEMP FLUID LOCK DUE TO TEMP CONDITIONS.