As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN DOOR IS EXTREMELY DIFFICULT TO LATCH AND LOCK USING EITHER THE INSIDE OR OUTSIDE LEVERS. SERVICED OPS TESTED MAIN CABIN DOOR LATCH AND LOCK WITH NO DEFECTS NOTED. CONTACTED MCC AND DUE TO A/C NOT HAVING HISTORY OF DISCREPANCY MCC OPTED TO SIGN OFF. ALL WORK IAW AMM 52-72-00 AND 12-20-15.