As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: GATE AGENT HAD A HARD TIME OPENING MAIN CABIN DOOR. HAD TO OPEN FROM INSIDE. FELT LIKE SOME RESIDUAL PRESSURIZATION BUT THERE WERE NO LIGHTS. MAINTENANCE FOUND ADHESIVE APPLIED TO THE DOOR SEAL AND CLEANED THE DOOR SEAL PER AMM 12-31-52. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.