Flight Crew Air Transport Pilot (ATP)
Flight Crew Type 1326
Troubleshooting
Aircraft Equipment Problem Less Severe; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Flight Crew Diverted; Flight Crew Landed in Emergency Condition; General Maintenance Action
Aircraft
Approximately one hour into flight; at FL320 we heard 3 loud grinding noises coming from behind and below the cockpit. Shortly after that we smelled a burning electrical odor and the Lead FA confirmed the odor in the FC galley. Crew accomplished Smoke/Fire/Fumes checklist then coordinated to have IRO find the source of the odor. No smoke or fire was observed. All galley carts were pulled; ovens turned off; and utility busses off as a precaution. Odor was intense but isolated.  Coordinated with Dispatch and turn back to ZZZZ. Asked Dispatch to provide landing data for overweight landing; flaps 30;and Runway 27L; as well as have emergency equipment standing by. IRO returned to cockpit and began running Diversion checklist. Lead FA was called to give her a brief; with no evacuation anticipated. FO flew the aircraft; while I communicated with ATC; Dispatch; and FA's. On descent; passing FL190; the right engine PRV EICAS illuminated with bleed light on overhead panel. Captain and IRO did checklist; shutting off right bleed and right pack. On base to final; the right autopilot EICAS and caution light illuminated; so FO flew approach manually. A smooth touchdown with approximately 300 fpm descent rate was made; and on rollout; the right center fuel pump EICAS and overhead light came on; with 5.1 fuel in the center tank. The fire equipment observed no abnormal conditions as we exited the runway; and followed us to the ramp as we taxied to the stand. Once parked; the fire crew and mechanic came aboard with a thermal detection unit; indicating a hot spot from underneath the galley floor. They opened the E&E compartment to discover the galley chiller motor in there had disintegrated. No fire or other damage in the E&E was noted. The chiller was deferred; and maintenance was accomplished; to address other write-ups. Attempt to phone the Operations Manager on the ground failed; but was able to work with Dispatch on SATCOM for new flight plan and dispatch. Took off and flew to ZZZ uneventfully. Documentation of write-ups were attempted; but because of ACARS re-initiation; some did not get into the system; including the primary reason for the diversion. Maintenance Release was issued with address of maintenance work done on the ground at ZZZZ.
[Report narrative contained no additional information.]
B767 flight crew reported detecting fumes in the cabin and flight deck an hour into flight. Flight diverted to an enroute airport and landed safely.