What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) The flight crew of N398SP were practicing takeoff and landing procedures during a training flight. After landing on runway 18 the crew used reverse and beta to slow the aircraft to taxi speed. When the brakes were applied to enter the taxiway and exit runway 18 the brake on the right hand main landing gear locked up and started to skid as the brakes were applied. The aircraft left the runway on the right side and the propeller struck a snow bank. The damage to the propeller was reported as minor. The mechanic that recovered the airplane and inspected the brakes reported taht there was a skid mark on the runway indicating the brake was locked up. The brake did not appear to have been locked at touch down because the tire skid mark did not begin until the aircraft was on the roll out well down the runway. The inspection of the brakes did not reveal any obvious indications of a malfunction however, the skid mark on the runway indicated that one brake did lock up when the brakes were applied.
As the FAA filed it
(-23) THE FLIGHT CREW OF N398SP WERE PRACTICING TAKEOFF AND LANDING PROCEDURES DURING A TRAINING FLIGHT. AFTER LANDING ON RUNWAY 18 THE CREW USED REVERSE AND BETA TO SLOW THE AIRCRAFT TO TAXI SPEED. WHEN THE BRAKES WERE APPLIED TO ENTER THE TAXIWAY AND EXIT RUNWAY 18 THE BRAKE ON THE RIGHT HAND MAIN LANDING GEAR LOCKED UP AND STARTED TO SKID AS THE BRAKES WERE APPLIED. THE AIRCRAFT LEFT THE RUNWAY ON THE RIGHT SIDE AND THE PROPELLER STRUCK A SNOW BANK. THE DAMAGE TO THE PROPELLER WAS REPORTED AS MINOR. THE MECHANIC THAT RECOVERED THE AIRPLANE AND INSPECTED THE BRAKES REPORTED TAHT THERE WAS A SKID MARK ON THE RUNWAY INDICATING THE BRAKE WAS LOCKED UP. THE BRAKE DID NOT APPEAR TO HAVE BEEN LOCKED AT TOUCH DOWN BECAUSE THE TIRE SKID MARK DID NOT BEGIN UNTIL THE AIRCRAFT WAS ON THE ROLL OUT WELL DOWN THE RUNWAY. THE INSPECTION OF THE BRAKES DID NOT REVEAL ANY OBVIOUS INDICATIONS OF A MALFUNCTION HOWEVER, THE SKID MARK ON THE RUNWAY INDICATED THAT ONE BRAKE DID LOCK UP WHEN THE BRAKES WERE APPLIED.