What was found
ON FLIGHT 4290 THE FLIGHT ATTENDANT REPORTED SHE HAD A DIFFICULT TIME OPENING THE MAIN CABIN DOOR. THE HANDLE OPERATED SMOOTHLY, YET DOOR WAS HUNG UP AND MAIN CABIN DOOR. THE AIRCRAFT WAS REMOVED FROM SERVICE. FOUND SEVERAL SECURITY SEALS ON DOOR FRAME SEAL. REMOVED SECURITY SEALS. DOOR OPERATIONAL CHECK WAS GOOD IAW EMB-145 M/M TASK 52-18-00-820-001-A00. DOOR TEST AT 39 LBS. THE AIRCRAFT WAS RETURNED TO SERVICE.