As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DEPARTURE WITH TAKEOFF POWER SELECTED CREW NOTICED SLIGHT ODOR IN COCKPIT SMELLED LIKE OVERHEATED DUCTS NOT ELECTRICAL, BRAKE OR TIRES. AFTER LANDING PASSENGERS TOLD F/A THAT THEY SAW HAZE AND ODOR IN AFT CABIN. AFTER TAKEOFF ODOR DISSIPATED AFTER 1 MINUTE FROM INITIAL OBSERVATION. FOUND LOOSE UNION ON APU OIL PRESSURE SWITCH THAT CONTAMINATED APU INLET WITH OIL-TIGHTENED LINE AND CLEANED APU INLET IN WASH RACK. PERFORMED OPN 5089 DUCT BURNOUT AND CHANGED COALESCER BAGS. LEAK AND OPS CHECKS GOOD.