As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO DOOR OPEN /CLOSE SWITCH INOP, ONLY WORKS WHEN FWD CARGO DOOR OPERATED. PLACING AFT CARGO DOOR OPEN/CLOSE SWITCH ON MEL 5230AB. OK TO APPLY MEL 5230AB FOR AFT CARGO DOOR ELECTRICAL CONTROL INOP PLACED AFT CARGO DOOR OPEN/CLOSE SWITCH ON MEL 5230AB. COMPLIED WITH MEL5230AB, AFT CARGO DOOR SECURED LOCKED AND LATCHED. REPLACED SELECTOR VALVE AFT IAW AMM 52-36-15/401.