As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT WHEN USING THE RIGHT AIR COND PACK IN THE FULL HOT POSITION THE CABIN HAD A SLIGHT HAZE PRESENT. HAZE DISSIPATED WHEN TEMP SELECTION WAS REDUCED. MAINTENANCE IN DTW PERFORMED FOUND THE RIGHT ACM AND APU BOTH PUTTING OIL INTO THE PNEUMATIC SYSTEM. THE AIRCRAFT WAS REPOSITIONEDTO MSP FOR FURTHER MAINTENANCE.