B757 Undifferentiated or Other Model
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Flight Crew Last 90 Days 179; Flight Crew Total 3103; Flight Crew Type 661
Situational Awareness; Training / Qualification; Communication Breakdown
Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Procedure; Environment - Non Weather Related; Human Factors
The [electronic fuel monitoring system] showed that we were out of tolerance on the high side for gallons boarded. I asked for the fueler to come speak to us. When I showed him the [electronic fuel monitoring system] and asked him to explain it; he was unable to do so. He knew nothing about gallons tolerance; and he seemed confused when I asked him if perhaps the density was incorrect. He said he just pumped in enough gallons to give us the fuel we requested. At that point I asked him to have his Supervisor come speak to us. The Supervisor told us that the fueler had used an incorrect density number. The fueler used 6.75; and the actual density was 6.67. I asked how this could happen. He replied that the density number is just typed into the device the fueler uses to transmit the fuel uplift information; and that it isn't updated very often. He also said that the same thing occurred on the previous day.I don't understand this answer at all. How can the person pumping fuel not understand the concept of fuel density? And how can the density number be entered into an electronic transmission device and not updated with some frequency? This is my second [report] this year about fueling issues in BOS. There might be some training and/or process issues going on here.
B757 Captain reported receiving more fuel than required and questioning fueler as to why.