As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING GND TAXI OPERATIONS PILOT PERFORMED ACFT BRAKE CHECK, PILOT NOTICED RT SIDE BRAKE WAS INOPERATIVE. PILOT DECIDED TO RETURN TO BASE HANGAR & BECAUSE LT SIDE BRAKE WAS OPERABLE PILOT TAXI BACK TO MX HANGAR WITHOUT FURTHER INCIDENT. INSPECTION REVEALED RT MAIN CALIPER LEAKING. REMOVED CALIPER, RE-SEALED & REINSTALLED CALIPER. OPERATIONAL CHECK OF BRAKING SYS WAS NORMAL.