Narrative:

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 flight attendant confirmed the odor in the fc galley. Crew accomplished smoke/fire/fumes checklist then coordinated to have international relief officer 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. International relief officer returned to cockpit and began running diversion checklist. Lead flight attendant was called to give her a brief; with no evacuation anticipated. First officer flew the aircraft; while I communicated with ATC; dispatch; and flight attendant's. On descent; passing FL190; the right engine prv EICAS illuminated with bleed light on overhead panel. Captain and international relief officer did checklist; shutting off right bleed and right pack. On base to final; the right autopilot EICAS and caution light illuminated; so first officer 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 east&east compartment to discover the galley chiller motor in there had disintegrated. No fire or other damage in the east&east 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.

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Original NASA ASRS Text

Title: 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.

Narrative: 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.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.