As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LANDING THE CREW REPORTED THE CAPTAINS LEFT BRAKE PEDAL HAD NO RESISTANCE. A/C TAXIED TO THE GATE WITHOUT FURTHER INCIDENT. MX REMOVED/REPLACED THE CAPTAINS LEFT BRAKE MASTER CYLINDER IAW BEECHCRAFT MM 32-40-06. A/C WAS RELEASED FOR SERVICE.