As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: ON TAXI IN AFTER EXISTING RUNWAY LOST MOST OF BRAKING AUTHORITY. COULD STOP AIRCRAFT TAXING SLOWLY ON POST FLIGHT. DISCOVERED A HOSE HAD COME UNDONE AND HANGING DOWN FROM LEFT MAIN TRUCK. REPLACE BRAKE IAW AMM 32-41-11 AND AMM 32-41-41.