B767-300 and 300 ER
Flight Crew Air Transport Pilot (ATP)
Training / Qualification; Distraction; Workload
Aircraft Equipment Problem Critical; Inflight Event / Encounter Fuel Issue
Flight Crew Took Evasive Action; General Maintenance Action
Aircraft; Chart Or Publication; Manuals
Maintenance problem. We had a fuel transfer in flight from left main to center tank. Accomplished QRH procedure; which basically says to re-balance fuel and make a maintenance log entry. Normally when this happens; re-balancing once or twice fixes the problem. On this flight; we had to re-balance multiple times. There was no external leak and the problem was manageable. I felt continuing was more prudent than diverting and landing overweight. We continued on our flight; landed uneventfully. I wrote up a 3 page maintenance log write-up discussing the problem in detail.  There is no QRH guidance for continued operation with this problem. Although we did not violate any procedure or limitation; and all agreed we were OK to continue the flight. My first officers suggested filing a report.A follow-up with Maintenance revealed a fueling valve that did not fully close. The only suggestion I would make is to perhaps put some guidance in the new 767 QRH.
A B767-300 fueling valve did not completely close after refueling so left tank fuel continuously transferred into the Center tank requiring the crew to repeatedly re-balance the fuel tanks.