As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN-ROUTE, ON FINAL APPROACH, CREW SMELLED UNUSUAL ODOR IN COCKPIT. FLIGHT ATTENDANTS REPORTING STRONG ODOR THROUGHOUT ENTIRE PLANE. DECLARED AN EMER. AFTER LANDING, CFR INSPECTED ACFT FOR HEAT SIGNATURE. THE FIRE DEPARTMENT FOUND NO PROBLEMS. THE ACFT FINISHED TAXIING TO THE GATE WITHOUT FURTHER INCIDENT. MX INSPECTED THE ACFT. R & R ALL 8 FILTER ELEMENTS. RAN NR 1 & 2 ENGS WITH PACKS. ALSO RAN APU WITH PACKS. NO ODOR DETECTED.