As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CRUISE EN ROUTE FROM CHS TO PIK, FELT BUFFETING FROM NLG DOOR. DOORS WERE CYCLING OPEN AND CLOSED. PLACED HANDLE IN OFF POSITION AND DIVERTED TO JFK. REPLACED NLG SEQUENCE VALVE MECHANISM AND NLG DOOR ACTUATOR PER MM 32-34-08, 32-34-14. OPS CHK GOOD ON GROUND.