As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PARKED WITH PARKING BREAK SET LOST YELLOW HYDRAULIC SYSTEM AIRCRAFT STARTED TO ROLL AIRCRAFT CONTINUE TO MOVE IN ALL BREAK SETTINGS REMOVED AND REPLACED HYD LINE REF AIPC 32-14-58-02B ITEM 210 AND AMM 32-42-27.RAN MOTOR TO VERIFY NO AIR IN SYSTEM LEAK CHECK GOOD NO DEFECTS NOTED AT THIS TIME.