What was found
624 21-01 2045341 23MAY19 PHL CLOSE ELECTRIC BURNING SMELL IN COCKPIT AT 23K FT. ICING SYSTEM BRIEFLY CAME ON. ODOR DISSIPATED AT 20K FT DESCENDING. 27371 00 JJC FACT 23MAY19 16:01 PHL INSPECTED AND SMELL CHECKED BOTH RELAY PANELS L/R, NOSE AVIONICS BAY AND REAR NOSE AVIONICS BAY, ALL FLASHLIGHTS, UNDER INSTRUMENT PANEL LEFT AND RIGHT SIDE. RAN ALL SYSTEMS AND NO SMELL OR EVIDENCE OF BURNING NOTED . AIRCRAFT OK FOR SERVICE.