As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3962 THE CREW REPORTED THE MAIN CABIN DOOR WAS VERY HARD TO CLOSE. THE AIRCRAFT WAS REMOVED FROM SERVICE. LUBRICATED DOOR HANDLE IAW EMB-145 AMM 52-18-00-600-801-A. NO PARTS REMOVED OR REPLACED. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.