Narrative:

Approximately 35 minutes after takeoff; a passenger observed fuel leaking from top refueling cap on the right wing. He reported this to one of the flight attendants who notified the co-pilot; who had just begun the first break. He took a look and then came up to the cockpit to brief the flying copilot and me. I turned the aircraft and ATC communications over to the pilot flying while I went back to observe the leak first hand. [The co-pilot on break] moved up to assist [the pilot flying]. During the time I was in back; [the co-pilots] coordinated with [ATC] to enter a holding pattern to give us time to work the problem without getting too far away from possible divert airfields. While in back; I coordinated with my purser. Following [procedures]; we coordinated the arrival into ZZZZ with emphasis on no evacuation and the plan to have crash fire rescue equipment look us over after landing. After returning to the cockpit; I coordinated with dispatch and maintenance over the satellite communications. After reviewing several options; it was decided to divert to ZZZZ. We were given direct to the airport. We decided to land at a little under the max gross weight. With that in mind; we coordinated with ATC to dump fuel just north of the airport (out over the water at FL250). Both the fuel leak checklist and fuel dump checklist were performed. After dumping the center tanks; we continued orbiting over the field to burn down an additional 10;000 lbs. Reports from the back of the airplane from my flight attendants was that the fuel leak coming out of the fuel cap was significantly reduced. After reducing our weight enough; we coordinated with ATC for the ILS. An uneventful landing followed. Pulling off the end of the runway onto the taxiway; we shut down the engines and had crash fire rescue equipment look us over to ensure that the fuel leak had stopped. There was no evidence of fuel leaking around the engine. There was also no more evidence of fuel leaking around the wing except for a strong fuel odor. [One of the co-pilots] had coordinated with operations for a tow so after the inspection we were towed to a remote hard stand. The station manager had also coordinated busses and maintenance to meet us at the hard stand. He had already coordinated the rebooking of the passengers on two flights back to [the us]. It should be noted that [the station manager] and all his staff did a stellar job in handling this diversion with the myriad of problems that it caused. This event was concluded by the deplaning of the passengers; coordinating the cargo bins (no handling available for our operations as this was a 757 destination); and then providing the write-up and photos of the fuel leak to maintenance.after spending the night in ZZZZ; our crew (including flight attendants); returned to the aircraft to fly to [the us]. Maintenance had replaced the right fuel cap and ran several maintenance tests on the tank. We were delayed 45 minutes by a security inspection of the aircraft. This inspection did not get started until 15 minutes before door closing. The flight crew wasn't allowed to leave the terminal until the inspection was complete. The rest of the startup; push and taxi was normal except for another delay when we received a ACARS from dispatch notifying us that the company wanted us to fly to ZZZZ1 to pick up 150 people. After a short delay; dispatch sent another ACARS message telling us that the plan was off and for us to continue on. Takeoff and the first part of the climb was normal; however; passing through FL220; we received a call from the back that fuel was leaking again from the fuel cap on the right wing. The purser got a great video of the fuel streaming. It is available if needed. The rest of the flight was a repeat of the day before. [Procedures] with the purser. Coordination with dispatch and maintenance to return to ZZZZ. [Advised ATC]. As we had a lighter fuel load and no passengers; there was no need to dump fuel. We flew direct back to ZZZZ; right downwind and base for the ILS. Uneventful landing followed by inspection by crash fire rescue equipment and tow back to the remote parking. Turned the aircraft over to maintenance and the event was complete.

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Original NASA ASRS Text

Title: B767 flight crew reported fuel coming out of a refueling cap on the right wing of the aircraft.

Narrative: Approximately 35 minutes after takeoff; a passenger observed fuel leaking from top refueling cap on the right wing. He reported this to one of the flight attendants who notified the co-pilot; who had just begun the first break. He took a look and then came up to the cockpit to brief the flying copilot and me. I turned the aircraft and ATC communications over to the pilot flying while I went back to observe the leak first hand. [The co-pilot on break] moved up to assist [the pilot flying]. During the time I was in back; [the co-pilots] coordinated with [ATC] to enter a holding pattern to give us time to work the problem without getting too far away from possible divert airfields. While in back; I coordinated with my Purser. Following [procedures]; we coordinated the arrival into ZZZZ with emphasis on no evacuation and the plan to have CFR look us over after landing. After returning to the cockpit; I coordinated with dispatch and Maintenance over the satellite communications. After reviewing several options; it was decided to divert to ZZZZ. We were given direct to the airport. We decided to land at a little under the max gross weight. With that in mind; we coordinated with ATC to dump fuel just north of the airport (out over the water at FL250). Both the fuel leak checklist and fuel dump checklist were performed. After dumping the center tanks; we continued orbiting over the field to burn down an additional 10;000 lbs. Reports from the back of the airplane from my flight attendants was that the fuel leak coming out of the fuel cap was significantly reduced. After reducing our weight enough; we coordinated with ATC for the ILS. An uneventful landing followed. Pulling off the end of the runway onto the taxiway; we shut down the engines and had CFR look us over to ensure that the fuel leak had stopped. There was no evidence of fuel leaking around the engine. There was also no more evidence of fuel leaking around the wing except for a strong fuel odor. [One of the co-pilots] had coordinated with Operations for a tow so after the inspection we were towed to a remote hard stand. The Station Manager had also coordinated busses and Maintenance to meet us at the hard stand. He had already coordinated the rebooking of the passengers on two flights back to [the US]. It should be noted that [the Station Manager] and all his staff did a stellar job in handling this diversion with the myriad of problems that it caused. This event was concluded by the deplaning of the passengers; coordinating the cargo bins (no handling available for our operations as this was a 757 destination); and then providing the write-up and photos of the fuel leak to Maintenance.After spending the night in ZZZZ; our crew (including Flight Attendants); returned to the aircraft to fly to [the US]. Maintenance had replaced the right fuel cap and ran several maintenance tests on the tank. We were delayed 45 minutes by a security inspection of the aircraft. This inspection did not get started until 15 minutes before door closing. The flight crew wasn't allowed to leave the terminal until the inspection was complete. The rest of the startup; push and taxi was normal except for another delay when we received a ACARS from dispatch notifying us that the company wanted us to fly to ZZZZ1 to pick up 150 people. After a short delay; dispatch sent another ACARS message telling us that the plan was off and for us to continue on. Takeoff and the first part of the climb was normal; however; passing through FL220; we received a call from the back that fuel was leaking again from the fuel cap on the right wing. The purser got a great video of the fuel streaming. It is available if needed. The rest of the flight was a repeat of the day before. [Procedures] with the purser. Coordination with Dispatch and Maintenance to return to ZZZZ. [Advised ATC]. As we had a lighter fuel load and no passengers; there was no need to dump fuel. We flew direct back to ZZZZ; right downwind and base for the ILS. Uneventful landing followed by inspection by CFR and tow back to the remote parking. Turned the aircraft over to Maintenance and the event was complete.

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.