As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLOW LIGHT ILLUMINATED AFTER TAKEOFF. LEFT PACK FLOW GAGE WENT TO ZERO. CABIN WAS CLIMBING WITH THE AIRCRAFT. FLIGHT ATTENDANT REPORTED A BURNING METAL SMELL AND LITE HAZE IN AFT CABIN. ACCOMPLISHED WORK CARD 21-92-12 PACK BURN AND WORK CARD NUMBER 21-96-01 CABIN ODOR. CHECKED DUCTS. SYSTEM GROUND CHECKED NORMAL OPERATION.