A B767-300 PLT RPTS DECLARING AN EMER AND DIVERTED TO A NEARBY ARPT BECAUSE OF A BURNING RUBBER SMELL. NO FIRE WAS FOUND.

Narrative

WHILE I WAS ON THE THIRD CREW REST BREAK; A BURNING RUBBER SMELL IN THE VICINITY OF ROW 30 WAS RPTED TO ME. I WALKED BACK TO INVESTIGATE THE SITUATION. I DETECTED THE ODOR BUT SAW NO VISIBLE SMOKE. I DISCUSSED THE SITUATION WITH THE FLT ATTENDANTS AND ASKED THEM TO CONDUCT A SEARCH OF THE AREA; INCLUDING FEELING THE FLOOR AREA FOR HEAT. NO SOURCE OF THE ODOR WAS FOUND. AS I WALKED BACK THROUGH THE AREA OF ROW 30 ENRTE TO THE COCKPIT; THE SMELL HAD INTENSIFIED. I RETURNED TO THE FLT DECK AND RESUMED THE DUTIES OF PLT MONITORING. WE DECLARED AN EMER AND PROCEEDED TO ZZZ; THE CLOSEST SUITABLE ARPT FOR LNDG. WE RAN THE SMOKE AND FUMES ELECTRICAL CHKLIST; SHUT OFF L AND R RECIRCULATION FANS AND L AND R UTILITY BUS SWITCHES. AT THAT POINT; THE FUMES DIMINISHED. IT WAS DETERMINED THAT AN EVAC WOULD NOT BE NECESSARY AND THAT WE WOULD TAXI TO THE RAMP AFTER LNDG. THE DISPATCHER WAS NOTIFIED VIA ACARS. A FLT ATTENDANT WAS SEATED IN ROW 30 FOR LNDG TO MONITOR THE SITUATION. WE MAINTAINED COM WITH THE LEAD FLT ATTENDANT WHO RPTED THAT SITUATION IN THE CABIN WAS NORMAL. WE MADE A PA TO THE PAX TO APPRISE THEM OF THE SITUATION. WE COMPLETED THE APPROPRIATE CHKLISTS AND LANDED UNEVENTFULLY AT ZZZ. WE TAXIED TO THE RAMP AND WERE MET BY FIRE TRUCKS. NO SMOKE WAS RPTED. THE CARGO AREA WAS INSPECTED AND NO SMOKE OR HOT SPOTS WERE DETECTED. AFTER ABOUT 1 HR DELAY DUE TO CUSTOMS CONCERNS AND RAMP CLOSURE DUE TO A TSTM; PAX WERE DEPLANED. NO INJURIES OR PAX PROBS WERE RPTED.