As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 510 FLL-EWR, A/C DIVERTED TO MCO DUE TO DOOR EMERGENCY RT OPEN MESSAGE. CREW REPORTED NO PRESSURIZATION ISSUES. TECHNICIAN FOUND LATCH ON RT OVERWING DOOR OFF DETENT. INSPECTED DOOR AND LATCHING MECHANISM PER AMM 52-21-00. ALL INDICATION NORMAL AFTER DOOR WAS CLOSED.