As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) BRAKE REPORTED TO NOT BE CAPABLE OF HOLDING THE AIRCRAFT. INVESTIGATION FOUND THAT THE AIRCRAFT HAD BEEN STORED OUTSIDE DURING FREEZING TEMPS AND THAT AN AMOUNT OF WATER HAD FROZEN IN THE MASTER CYLINDER THUS DEGRADING BRAKING PERFORMANCE. THE MASTER CYLINDER AND BRAKES WERE BLED AND THE AIRCRAFT RETURNED TO SERVICE.