As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THIS AIRCRAFT WAS IN THE PROCESS OF MAINTENANCE FOR A PASSENGER DOOR ISSUE. UPON REMOVAL OF THE ACFT MAIN PASSENGER DOOR AND SUBSEQUENT RE-INSTALLATION AND RIGGING THE DOOR WAS OPERATED THROUGH RANGE OF MOTION ONCE WITH NO ISSUE. UPON THE TECH STEPPING ONTO THE FIRST STEP OF THE DOOR THE MAIN DOOR BALANCE SECTOR GEAR CRACKED AND SPRANG AWAY FROM THE ASSY UNDER LOAD IMPACTING ADJACENT PARTS.