B757 Undifferentiated or Other Model
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 164; Flight Crew Total 1737; Flight Crew Type 681
Troubleshooting; Situational Awareness
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Weight And Balance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Provided Assistance; Flight Crew Returned To Departure Airport; Flight Crew Landed As Precaution; Flight Crew Diverted; Flight Crew Requested ATC Assistance / Clarification
Aircraft
At about 50 minutes into flight just north of ZZZ1 at FL350 we experienced a loss of our Left Fuel quantity gauge; and fuel totalizer. After conferring with QRH; Dispatch; and [Technical Support Maintenance Control]; it was determined that there was no inflight reset; and we did not feel comfortable continuing an Atlantic crossing without knowing the fuel quantity. We [Requested Priority Handling]; notified crew; and diverted to ZZZ where we made a safe overweight landing.
B757 First Officer reported the failure of the fuel quantity indicator; the return to departure airport and overweight landing.