As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) RT BRAKE CITED AS ''SOFT''. AME REMOVED RT SHUTTLE VALVE AND DISSASSEMBLED IT. CUT O-RING REPLACED. FAULT STILL APPEARED. AME REMOVED RT MASTER CYLINDER (P/N90-380001-11(VI-15-1000)) AND DISASSEMBLED.SPRING WASHER FOUND TO BE SPLIT IN HALF.SPRING REPLACED.CHECKED OK.