What was found
ONE HOUR OUT OF NRT EXPERIENCED AN ELEC BURNING ODOR IN THE COCKPIT. COCKPIT CREW SAY NO SMOKE. ACCOMPLISHED INSPECTION OF COCKPIT AREA IAW AMM 05-51-56 & FIM 21-00-TASK 810, NO EVIDENCE OF SMOKE & DEFECT FOUND. CHECKED ALL PACS, HUMID CMC BITE TESTED PASSED, UPPER LOWER RECIRC FAN, GASPER, UTILITY LT & RT & TRIM AIR ALL OPERATIONS CHECKED NORMAL & NO FAULT DURING ON GRD. ACCESSED EE COOLING SUPPLY FAN & VERIFIED FAILED WITH RESIDUAL ODOR AROUND FAN.