What was found
ON DEPARTURE, SMELLED AN ODOR FROM AN UNKNOWN ORIGIN. THERE WAS A HAZE IN COCKPIT AND A STRONG ODOR. AFTER LANDING, ODOR SEEMED TO BE PRIMARILY IN COCKPIT, NOT GALLEY AREA. AFTER ACFT RELEASED BY NTSB FOR T/S, RAN ALL 3 PACKS USING APU. ASCP IN MANUAL, TRIM AIR OFF, ECON OFF & ALL ZONE TEMPS FULL HOT. AFTER 10 MIN, WAS ABLE TO DUPLICATE PDIS FOR A SHORT TIME. HAZE FROM ACFT VENTS IN COCKPIT & MAIN DECK. AS PRECAUTION, CHECKED WIRING & EQUIPMENT RACKS IN COCKPIT & FWD E & E COMPARTMENT, NO DEFECTS NOTED. PREFORMED AC PACKS/ODOR & DIST DUCTS CLEAN OUT PROCEDURE. DURING COALESCER BAG R & R NOTED NR 3 PACK DIRTIER THAN NR 1 OR NR 2. NO OTHER DEFECTS NOTED. RAN ALL 3 ENGS & APU ALL 3 PACKS ON. NO HAZE OR ODOR NOTED. ALL PACK OPS NORMAL. REF MM 21-53-00-7. ACFT OK FOR SERV. FINAL CLOSED.