As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(LOG 8176324) DURING CRUISE FA'S INFORMED US THAT THERE WAS A DISTINCT BURNING RUBBER ODER /FUMES IN THE VICINITY OF ROWS 16-19 WE RAN THE QRH SMOKE/FIRE/FUMES CHECK LIST THROUGH STEP #13 THE FUMES QUICKLY DISAPATED AND DID NOT RETURN. T/S PER B737 FIM 21-00 TASK 806 STEPS I,J.K FOUND PED OUTLET 17 E F CONTAMINATED.