As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MLI-MSP - FLT 3285 - EN ROUTE AT 16,000, THE PASSENGER DOOR WARNING LIGHT ILLUMINATED. THE CREW DEPRESSURIZED THE AC TO 4.7 PSI DIFFERENTIAL AND THE LIGHT EXTINGUISHED. THE FLIGHT CONTINUED TO MSP WITHOUT INCIDENT. MAINTENANCE ADJUSTED THE RIGGING OF THE PASSENGER DOOR BAYONETS AND DOOR WARNING SWITCH. THE SYSTEM OPERATED SATISFACTORILY. (W)