As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT 3157, 7 MIN AFTER TAKEOFF AN OIL OR NEW TIRE SMELL WAS DETECTED BY FLIGHT ATTENDANTS. IT DISAPATED AS FLIGHT PROGRESSED. WE HAD THE APU ON FOR TAKEOFF. CORRECTIVE ACTION: FOUND BURNING/SEIZING AVIONIC BLOWER FAN. REPLACED AVIONIC BLOWER FAN. (LP 9689343)