As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BRAKES IN LT SEAT FEEL MUSHY. THERE IS EXCESSIVE TRAVEL IN THE BRAKE PEDAL BEFORE YOU FEEL BRAKE PRESSURE. FOUND SIGNS OF FLUID LEAKING FROM PILOTS LT BRAKE MASTER CYCLINDER. R&R PILOTS LT MASTER CYLINDER WITH O/H UNIT IAW MM CHAP 32-42-02. OPS CHECK GOOD, LEAK CHECK GOOD. PERFORMED BRAKE BLEEDING PROCEDURE AS REQUIRED MULTIPLE TIMES.