As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN DOOR: MAIN DOOR CANNOT BE CLOSE FROM THE OPEN POSITION. DURING THE DOOR CLOSING A LOUD BOOM COULD BE HEARD. AFTER THAT THE DOOR IS STUCK IM THE OPEN POSITION . CORRECTIVE ACTION: REPLACED BALANCE GEAR BOX ASSEMBLY. OPS CHECK GOOD. IAW EMB505 AMM 52-13-00.