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 DOES NOT CONSISTENTLY RELEASE OR FALL OPEN AFTER UNLOCKING. AFTER 3.5 HOUR FLIGHT, MAIN CABIN DOOR REQUIRED EXCESSIVE PRESSURE TO OPEN. AN INTERNAL CLUNCK WAS HEARD WHEN PILOT APPLIED SIGNIFICANT POSITIVE PRESSURE TO GET MAIN CABIN DOOR TO OPEN.