B777 flight crew reported precautionary air return due to persistent odor throughout the aircraft.

Attributes
ACN	1678482
Time
Date	201908
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument
Experience	Flight Crew Last 90 Days 196.35 Flight Crew Total 22099.55 Flight Crew Type 7756.68
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Experience	Flight Crew Last 90 Days 194 Flight Crew Total 10820 Flight Crew Type 2732
Events
Anomaly	Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

Narrative:

Flight attendants reported electrical smell in aft galley after takeoff. [Relief pilot] was sent to investigate. He determined that it was not electrical. All ovens and galley equipment were verified to be operating normally. [Maintenance control] and dispatch were conferenced. There was no EICAS messages. [Maintenance control] did not have any abnormal telemetry data. Dispatch agreed that a precautionary maintenance return was in order. The smell never intensified or went away. Fuel was dumped; all normal checklists were run. We did not declare an emergency; we did not land overweight.

Original NASA ASRS Text

Title: B777 flight crew reported precautionary air return due to persistent odor throughout the aircraft.

Narrative: Flight attendants reported electrical smell in aft galley after takeoff. [Relief Pilot] was sent to investigate. He determined that it was not electrical. All ovens and galley equipment were verified to be operating normally. [Maintenance Control] and Dispatch were conferenced. There was no EICAS messages. [Maintenance Control] did not have any abnormal telemetry data. Dispatch agreed that a precautionary Maintenance return was in order. The smell never intensified or went away. Fuel was dumped; all normal checklists were run. We did not declare an emergency; we did not land overweight.

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.