As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COPILOTS RT BRAKE PEDAL GOES TO FLOOR WITHOUT BRAKES. PEDAL PUMPS UP NORMALLY AND THEN BRAKE CATCHES. PERFORMED OPS CHECK OF CO-PILOTS R/H BRAKE PEDAL IAW CESSNA 560MM 32-42-02. FOUND CO-PILOTS R/H BRAKE MASTER CYLINDER LEAKING FROM LOWER JAM NUT REMOVED AND REPLACED CO-PILOTS R/H MASTER CYLINDER AND PILOTS R/H MASTER CYLINDER IAW CESSNA 560 MM 32-42-02 BRAKE SYSTEM BLED IAW CESSNA 560 MM 32-42-00 OPS & LEAK CK GOOD