What was found
IN FLIGHT DURING APPROACH, A STRONG ODOR WAS DETECTED IN THE COCKPIT FOR 15 SECONDS AND SELF EXTINGUISHED. AFTER LANDING, FLIGHT ATTENDANT CONFIRMED ABNORMAL ODOR ON LEFT SIDE OF AIRCRAFT IN THE SAME PHASE OF FLIGHT. INSPECTED LEFT AND RIGHT RELAY PANELS, WINDSHIELD HEATING SENSORS. CHECKED THE DISPLAY UNITS, FLASHLIGHTS AND NO SIGNS OF ELECTRICAL BURNING ODOR. GROUND RAN AIRCRAFT WITH APU BLEED AND ENGINE BLEEDS. OPERATED NR 1 PACK. NO DEFECTS NOTED. OK FOR SERVICE.