Narrative:

The first leg was conducted uneventfully. The first officer's walk around preflight was uneventful. Also; the first officer's preflight on leg two was uneventful. The first officer and I were in the cockpit performing normal preflight procedures when ground crew personnel came into the cockpit and informed me (ca) that fuel was leaking from the right wing. I immediately and expeditiously left the cockpit to inspect the fuel leak; and once I witnessed the size of the leak and noticed the amount of fuel leaking from the right wing pressure relief valve; and also noticed the fumes from the fuel leak present in the area; I returned to the aircraft via the L2 door in informed the passengers to gather their belongings and in a clam but expeditious manner; to leave the aircraft through the boarding door. I informed the gate agent to discontinue the boarding process and prepare for all passengers to gather in the gate area. The airport fire department was on sight. Maintenance could not reseat the pressure relief valve; so they transferred remaining fuel (14;500 lbs) from the right wing to the left wing tank. Maintenance subsequently removed the aircraft from service.the aircraft had 'multiple' identical write up's in the previous 5 days. Each time; the corrective action taken; was to reseat the valve and return the aircraft to service. In my view; after the second repeated event; the proper course of action would've been to replace the right wing pressure relief valve. Had this valve failed in flight; any of a number of more serious events could've developed.

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Original NASA ASRS Text

Title: B757 Captain was informed just prior to closing the cabin door of a fuel leak from the right wing. Visual inspection revealed the pressure relief valve was allowing fuel to leak from the right wing. The Captain ordered the passengers to exit the aircraft via the main cabin door. The valve had been reset for leaks multiple times in the five previous days.

Narrative: The first leg was conducted uneventfully. The FO's walk around preflight was uneventful. Also; the FO's preflight on leg two was uneventful. The FO and I were in the cockpit performing normal preflight procedures when ground crew personnel came into the cockpit and informed me (CA) that fuel was leaking from the right wing. I immediately and expeditiously left the cockpit to inspect the fuel leak; and once I witnessed the size of the leak and noticed the amount of fuel leaking from the right wing pressure relief valve; and also noticed the fumes from the fuel leak present in the area; I returned to the aircraft via the L2 door in informed the passengers to gather their belongings and in a clam but expeditious manner; to leave the aircraft through the boarding door. I informed the gate agent to discontinue the boarding process and prepare for all passengers to gather in the gate area. The airport fire department was on sight. Maintenance could not reseat the pressure relief valve; so they transferred remaining fuel (14;500 lbs) from the right wing to the left wing tank. Maintenance subsequently removed the aircraft from service.The aircraft had 'multiple' identical write up's in the previous 5 days. Each time; the corrective action taken; was to reseat the valve and return the aircraft to service. In my view; after the second repeated event; the proper course of action would've been to replace the right wing pressure relief valve. Had this valve failed in flight; any of a number of more serious events could've developed.

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.