As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER FLIGHT, CABIN DOOR WOULD NOT OPEN FROM INSIDE, APPLIED EXCESSIVE FORCE MULTIPLE TIMES OVER 15 MINUTE PERIOD. HAD TO OPEN DOOR FROM OUTSIDE. TOOK A WHILE AND WAS VERY HARD FROM OUTSIDE ALSO. AIR PRESSURE WAS NOT RELEASING. REMOVED AND REPLACED MAIN CABIN DOOR SEAL INFLATION VALVE AND PERFORMED ADJUSTMENT AND TEST IAW MM CHAPT 36-11-02, OPS CHECK GOOD.