As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - FLIGHT 2430 - MAIN CABIN DOOR DIFFICULT TO OPERATE IN BOTH DIRECTIONS. OPEN BUTTON DOES NOT RESPOND UNLESS THE DOOR HANDLE IS CYCLED SEVERAL TIMES. MAINTENANCE INSPECTED THE DOOR AND LUBRICATED THE LATCHING AND LOCKING MECHANISM. THE MAIN CABIN DOOR SEAL WAS LUBRICATED ALSO. OPERATIONAL CHECKS WERE GOOD AND THE AIRCRAFT WAS RETURNED TO SERVICE.