As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT WHEN THE MAIN CABIN ENTRY DOOR WAS OPENED THAT THE DOOR COUNTER BALANCE SPRING INSIDE THE DOOR FAILED. THE DOOR TRIM PANELS WERE REMOVED FOR ACCESS WHERE IT WAS FOUND THAT WHEN THE DOOR SPRING FAILED IT CAUSED DAMAGE TO THE DOOR INNER DOOR SKIN AND STRUCTURE. THE DOOR SKIN WAS REPLACED AND THE DOOR COUNTER BALANCE SPRING WAS REPLACED. THE AIRCRAFT WAS RETURNED TO SERVICE AFTER REPAIRS.