What was found
ATB SDR FILED OPEN*EMERG DECL'D*PAN PAN*AC LANDED W/OUT INCIDENT*SMELL IN THE COCKPIT W/ CREW AT SEAT POSITIONS, AT CRUISE ALT 36,000. LT SMOKE IN COCKPIT SMELL WAS LIKE ELECTRIC WIRE BURN. NO SMELL AFT OF COCKPIT. UNABLE TO INDENTIFY LOC OF COCKPIT ODOR.INSP UPPER C/B PANELS, CENTER CONSOLE, WINDOW HEAT&DEFOG CONNECTORS. NO SMELL NOTED. WINDOW HEAT&DEFOG CONNECTORS. NO SMELL NOTED.747-8 ENG RUN UP CHECKLIST FORM 32-12-08 IN REF WITH THE PRACTICES IN AMM 71-00-00 TO RUN ENGINES & LOOK FOR SMOKE/SMELL IN FLIGHT DK. INSP & RAN TEST ON SYSTEMS WITH NO FAULTS NOTE. A/C RETURNED TO SEVICE.