As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR COND DOORS LIGHT CAME ON IN FLT STAYED ON TILL ESTABLISH IN DESCENT TO DIVERT FIELD. A/C RELEASE FOR SERVICE PER MEL/CDL. DEFER ITEM PER MEL 52-4D CONT NR 39124, 3 DOOR CONFIRM LOCKED. REPLACED PACK 1 DOOR LIGHT SW. OPS CK OK PER M/M 52-42-01. SECURED DOORS.