As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT SEAT BRAKE PEDALS (LT AND RT) TRAVEL HALFWAY BEFORE ENGAGING. PEDAL FEEL SPONGY. LT SIDE NORMAL REMOVED COPILOTS LT MASTER CYLINDER P/N 9912050-17, S/N 0347 AND INSTALLED NEW UNIT P/N SAME, S/N 0872. REMOVED COPILOTS RT MASTER CYLINDER P/N 9912050-18, S/N 0372, AND INSTALLED NEW UNIT P/N SAME, S/N 1292 IAW MM CHAP 32-42-02. OPS AND LEAK CHECK GOOD.