Narrative:

We were parked at the ramp. Pilot in command went inside FBO to finish flight preparations (catering; papers;etc.) while second in command remained in aircraft to obtain clearance; load; etc. While performing these duties; second in command opened the fuel cross-feed valve to balance fuel. At some point; second in command had to leave aircraft but forgot that the fuel cross-feed valve was open. Both crew members were delayed in returning to the aircraft and as a result; over cross-feeding resulted in approximately 30 gallons of fuel spilling onto the ramp. FBO personnel and crew members cleaned spill as much as possible using 'soak up' material and liquid vacuum. Per FBO personnel; the leak was not considered a 'spill' as none of the fuel entered a drain. Acp on duty was advised and cleanup resulted in a 20 minute delay.

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Original NASA ASRS Text

Title: Corporate jet Captain reported his First Officer left the fuel crossfeed open during preflight while balancing their fuel load and a spill resulted.

Narrative: We were parked at the ramp. Pilot in Command went inside FBO to finish flight preparations (catering; papers;etc.) while Second in Command remained in aircraft to obtain clearance; load; etc. While performing these duties; Second in Command opened the fuel cross-feed valve to balance fuel. At some point; Second in Command had to leave aircraft but forgot that the fuel cross-feed valve was open. Both crew members were delayed in returning to the aircraft and as a result; over cross-feeding resulted in approximately 30 gallons of fuel spilling onto the ramp. FBO personnel and crew members cleaned spill as much as possible using 'soak up' material and liquid vacuum. Per FBO personnel; the leak was not considered a 'spill' as none of the fuel entered a drain. ACP on duty was advised and cleanup resulted in a 20 minute delay.

Data retrieved from NASA's ASRS site as of April 2012 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.