As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BURNING ELECT/RUBBER SMELL IN CABIN AREA, SUSPECT OVERHEAD READING PNL. REMOVED POWER FROM BOTH UTILITY BUSSES. SMELL WAS MOST PRONOUNCED ON THE LT OF THE CABIN AROUND SEAT ROW 35/36. CHECKED CABIN WITH ALL LEVELS OF LIGHT AND FAN OPERATION UNABLE TO DETECT ANY LOCALIZED HEAT AREAS OR SMELL ANYWHERE THROUGHT THE CABIN.