As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PIT - AFTER TAKEOFF, CREW NOTICED AN ODOR AND HAZE IN THE CABIN AND COCKPIT. AFTER SHUTTING OFF BLEEDS, ODOR SUBSIDED. AIRCRAFT RETURNED TO GATE IN PIT. MAINTENANCE INSPECTED ENVIRONMENTAL SYSTEM AND RAN A.C. WITH BLEEDS ON AND PRESSURIZED. NO DEFECTS NOTED. RETURNED TO SERVICE.