As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:NA**AIR TURN BACK - SDR FILED OPEN** DURING INITIAL CLIMB OUT FROM MAD AT APPROX 7000' MSL THE FWD CARGO DOOR EICAS MSG AND CARGO DOORS OVERHEAD LT ILLUMINATED. FWD CARGO DOOR INDICATION DEFERRED INOP IAW MEL 52-71-1-1 CAT "C". MAINT PROCEDURE ACCOMPLISHED. M700604