As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ISSUE; CREW REPORTED SHORTLY AFTER TAKEOFF GOT IECAS MESSAGE BAGGAGE DOOR OPEN, WE ALSO WENT MFD PAGE T/O IT SHOWS BAGGAGE DOOR OPEN, ASK THE FLIGHT ATTENDANT TO LOOK BACK AND VERIFY IF THERE’S ANY LIGHT COMING THROUGH SHE VERIFIED IT WAS SUNLIGHT COMING THROUGH THE DOOR. DECIDED TO RETURN DAL. CORR ACTION MX ADJUSTED BAGGAGE DOOR MICROSWITCH OPS TEST GOOD.