What was found
INSPECTION TYPE:N/A ON FINAL APPROACH AT GEAR DOWN, FLAPS 20 CALL. THERE WAS A FAST OCCURRENCE OF ODOR IN COCKPIT. NO SMOKE & NO ABNORMAL INSTRUMENT INDICATIONS. THE ODOR WAS DISTINCTIVELY BURNING RUBBER. IT DISSIPATED UPON TAXI IN. RAN BOTH PACKS & BOTH ENGINES, NO UNUSUAL ODORS NOTED.