As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 460 - FLIGHT ATTENDANT REPORTED ABNORMALLY HEAVY SMOKE/HAZE IN MAIN CABIN APPROXIMATELY 3 MINUTES AFTER TAKEOFF. WENT TO HIGH PRESSURE BLEED OFF, RETURNED TO ORD AND LANDED WITHOUT INCIDENT. TIGHTEN B NUT CONNECTION ON LEFT THRUST REVERSER CONTROL VALVE AND APU. LEAK CHECK GOOD. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)