As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS AFT CARGO DOOR SHOWS OPEN INDICATION WHEN CLOSED. VERIFIED DOOR CLOSED BUT INDICATION STILL SHOWS OPEN. VERIFIED DOOR IS CLOSED.: DOOR CONFIRMED SECURED CLOSED REMOVED AND REPLACED AFT CARGO DOOR PROXIMITY WARNING SWITCH IAW AMM 52-71-31. OPS CHECKED GOOD.