As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING THROUGH 13,000 FT, RECEIVED A FUSELAGE DOOR WARNING, CHECKING THE MFD DOORS PAGE, SAW THE AFT SERVICE DOOR INDICATED RED. FA-B PERFORMED A VISUAL INSPECTION AND SAW THE LEVER INDICATED THE OPEN POSITION. DIVERTED. LANDING UNEVENTFUL. REMOVED FROM SERVICE. DURING INSPECTION OF THE AFT SERVICE DOOR, FOUND THE DOOR HANDLE NOT FLUSH WITH DOOR SKIN. OPS CHECKED THE AFT SERVICE DOOR. OPS CHECKED GOOD. NO OTHER DEFECTS NOTED IAW AMM 52-41-00-710-801. RETURNED TO SERVICE.