As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CARGO DOOR LIGHT ILLMINATED ON PUSHBACK NEVER DISCONNECTED FROM TUG (BTB). MTX ENTERED ACFT AND OPENED MCD DOOR AND CHECKED OPERATION .CLOSED CARGO DOOR AND LOOKED. ADVISORY LIGHT ADVISORY LIGHT WENT OUT. OPS CHECK NORMAL AND IAW AMM 52-32-00, ACFT DEPARTED.