As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2826, DOOR HANDLE LIGHT ILLUMINATED IN FLIGHT. COULD NOT DETERMINE IF BOTTOM PIN WAS ALLIGNED. AIR RETURN TO DTW. MAINTENANCE CLEANED AND ADJUSTED DOOR HANDLE MICRO-SWITCH. PRESSURIZED AC TO 4.8 DIFFERENTIAL. OPS CHECK GOOD AT THIS TIME.