As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURN BACK - ON CLIMBOUT PASSING 6000 FT MAIN CARGO DOOR EICAS ON INDICATOR LIGHT INTERMITTENT LIGHT AND EICAS, EXECUTED CHECKLIST RETURN TO RFD PRESSURIZATION NORMAL DOOR CONTROL IND INTERMITTENT AS WELL. DEFERRED MAIN CARGO DOOR INDICATION AS PER MEL 52-71-1-2 C/W DMP 52-71-1-2REPLACED S890 PROX SWITCH AND ADJUSTED IAW AMM 52-71-09-822. DOOR INDICATION CKS GOOD.