As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BRAKE PEDALS WENT SOFT AND MUSHY ON CAPT AND CO-PILOTS SIDE ON LANDING. FOUND LEAKING B-NUT LEFT BRAKE. RE-TIGHTENED B-NUT AND BLED BRAKES BOTH SIDES IAW CE560 MM CH 32-42-01. OPS CHECK GOOD ON GROUND. DID FIND AIR IN LEFT AND RIGHT SIDES WHILE BLEEDING.