As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING AFTER T/O CHECKLIST GEAR HANDLE PLACED TO OFF, HEARD A THUMP AND GOT A LEFT GEAR GREEN AND RED LIGHT. LEFT GEAR DOWN AND DIVERTED TO BOSTON. JACKED A/C, SWUNG GEAR SEVERAL TIMES AND ALL INDICATIONS NORMAL. FOUND NOSE GEAR LOCKING ARM MAKING LOUD BANG. LUBED GEAR, RETRACTED GEAR SEVERAL TIMES AND ALL INDICATIONS NORMAL. A/C OK FOR SERVICE.