What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
During taxi to the ramp area at cbf, the pilot attempted a left turn to the normal parking spot on the ramp. The left brake on the aircraft failed which prevented the pilot from completing the turn. The pilot could not prevent the aircraft right wing tip fuel tank from striking a heavy steel post on the front of the terminal building. The tip tank received crush damage to the forward end. Post incident inspection of the aircraft did not reveal any structural damage or any external evidence of brake fluid leakage. The brake master cylinder had an internal leak due to a bad oring which bypassed brake fluid internally.
As the FAA filed it
DURING TAXI TO THE RAMP AREA AT CBF, THE PILOT ATTEMPTED A LEFT TURN TO THE NORMAL PARKING SPOT ON THE RAMP. THE LEFT BRAKE ON THE AIRCRAFT FAILED WHICH PREVENTED THE PILOT FROM COMPLETING THE TURN. THE PILOT COULD NOT PREVENT THE AIRCRAFT RIGHT WING TIP FUEL TANK FROM STRIKING A HEAVY STEEL POST ON THE FRONT OF THE TERMINAL BUILDING. THE TIP TANK RECEIVED CRUSH DAMAGE TO THE FORWARD END. POST INCIDENT INSPECTION OF THE AIRCRAFT DID NOT REVEAL ANY STRUCTURAL DAMAGE OR ANY EXTERNAL EVIDENCE OF BRAKE FLUID LEAKAGE. THE BRAKE MASTER CYLINDER HAD AN INTERNAL LEAK DUE TO A BAD ORING WHICH BYPASSED BRAKE FLUID INTERNALLY.