As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN FLT VIBRATION WENT AWAY WHEN GEAR SELECTED DOWN. REMOVED AND REPLACED LT DOOR (NOSE) ACTUATOR IAW EMB 140 AMM 32-33-03. ALSO PERFORMED LANDING GEAR EXTENSION AND RETRACTION IAW EMB 140 AMM 32-32-00. OPS CHECK GOOD, NO DEFECTS NOTED AT THIS TIME. AIRCRAFT RETURNED TO SERVICE