As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI , PASSENGER AND CREW SMELLED ELECTRICAL ODOR NEAR ROW 6. AIRCRAFT RETURNED TO BLOCKS AND FLIGHT CHANGED TO A/C5643. CHECK SEAT BOXES IN 1ST CLASS AND NOTHING FOUND. RAN NR 1 ENGINE AND PACKS AND THERE WAS A STRONG OIL SMELL IN THE COCKPIT AND CABIN. REPLACED THE EQUIPMENT COOLING FILTER AND BURNED OFF OIL SMELL BY RUNNING BOTH ENGINES, PACKS AND APU.