As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOTS RT BRAKE PEDAL GOES SOFT AFTER 15-20 SEC OF INITIAL BRAKE APPLICATION. (LOSSED APPX 2-3 INCHES OF PEDAL TRAVEL). INSTALLED 1EA NEW PILOTS RH BRAKE MASTER CYLINDER AND BLED SYSTEM. OPERATED ENGINES AND TAXI CHECKED NORM, WORK DONE IAW C560 M/M 32-42-02, 32-42-00 AND P.O.H.