As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INFLIGHT, F/AS REPORT "BURNING RUBBER SMELL" BETWEEN ROWS 21 AND 6. F/A PULLED GALLEY 2 CIRCUIT BREAKERS. SMELL SUBSIDED TO A POINT WHERE IT WAS NO LONGER NOTICEABLE THROUGHOUT REMAINDER OF FLIGHT. REPLACED RT RECIRCULATION FAN, LT AND RT FILTERS, AND ALL 4 COFFEE MAKERS. COMPLETED PACK BURN-OUT, CHECKS OK.