As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN DOOR: MAIN CABIN DOOR BINDING WHILE OPENING AND CLOSING. DIFFICULT TO OPEN AND CLOSE FROM INSIDE AND OUTSIDE OF AIRCRAFT. FOUND DOOR SEAL DIRTY AND CAUSING DOOR TO BE DIFFICULT TO OPEN/CLOSE. CLEANED DOOR SEAL AND PERFORMED SEVERAL OPERATIONAL CHECKS. DOOR NOW WORKS SMOOTHLY WITH NO BINDING. WORK PERFORMED I/A/W CE-680A AMM 52-10-00.