As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE AT FL330, RECEIVED A DOOR PAX FWD OPEN EICAS MESSAGE. RAN THE QRH. DOOR LOCK INDICATIONS WERE GREEN AND PRESSURIZATION WAS GOOD. DOOR OPEN INDICATION WENT AWAY ON DESCENT ABOUT FL220. INSPECTED, OPS TESTED MED IAW CMM 52-11-22. NO VISUAL OR MECHANICAL DEFECTS NOTED WITH LATCH OR SEAL.