As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN DOOR INTERIOR HANDLE IS EXTREMELY HARD TO MOVE. MAINLY TO THE CLOSED POSITION. IF THE MAIN CABIN DOOR IS IN THE OPEN POSITION IT APPEARS TO WORK NORMAL. CORRECTIVE ACTION: LUBRICATED MAIN CABIN DOOR INTERIOR HANDLE AS REQUIRED TO ACHIEVE PROPER OPERATION, OPS CHECKED GOOD. REF. CE-560XL S.P.M. 20-40-10.