As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: FLIGHT DECK DOOR EXTREMELY DIFFICULT TO OPEN. IT TOOK 2-3 MINUTES OF YANKING AND PULLING ON THE DOOR FOR THE FLIGHT ATTENDANTS TO BE ABLE TO OPEN IT. MAINTENANCE ADJUSTED UPPER DOOR LOCK AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 52-51-00.