As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 2090 - EN ROUTE SAN-DFW - SHORTLY AFTER TAKEOFF, DETECTED HAZE IN CABIN. LANDED DFW WITHOUT FURTHER INCIDENT. REPLACED MAGNETIC DRAIN PLUG O-RING AT APU. PERFORMED LEAK CHECK. NO LEAKS NOTED. PERFORMED PACK BURNOUT PER THE MM. SYSTEM GRUOND CHECKED NORMAL OPERATION. (M)