As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF PASSENGER DOOR LATCH CAUTION (AT 1,000 FT) APPEARED FOLLOWED BY PASSENGER DOOR LATCH WARNING AFTER 300 FT GAIN IN ALTITUDE. RETURNED TO THE FIELD. CLEANED AND INSPECTED GAPS ON PS5MB & PS6MB. GAPS CHECKED GOOD. CLEANED PAX DOOR WIRING HARNESS CANNON PLUGS. OPS CHECK GOOD.