As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LANDING, ON TAXI INTO THE FBO THE PIC'S LT TOE BRAKE WENT ALL THE WAY TO THE FLOOR WITH NO PRESS. PRESS SEEMED TO RETURN TO THE BRAKE PEDALS AFTER I PUMPED BOTH PIC'S PEDALS. FOUND BRAKE METERING VLV LEAKING FROM SHAFT. REMOVED VLV & INSTALLED AN OVERHAULED VLV. OPERATIONS & LEAK CHECKED NORMAL. TAXI CHECKED NORMAL, DONE IAW MM CHAPTER 32-42-05.