As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT (3000') CREW REPORTED PASSENGER DOOR EMERGENCY ANNUNCIATION (EICAS) MASTER WARNING AND AURAL FOLLOWED BY AMBER PAX DOOR OUT HANDLE THEN INTERMITTENT -PASSENGER DOOR-. AIRCRAFT RETURNED TO DCA WITHOUT INCIDENT. INSPECTION OF PAX DOOR, PSEU BOX AND SWITCH COMPLETED, ALL CHECKED GOOD. REMOVED AND REPLACED PROX SENSOR. OPERATIONAL CHECK GOOD. AIRCRAFT WAS RELEASED AND RETURNED TO SERVICE.