If I remember reading this incident it had something to do with fuel management. Here is the dialog findings about the fuel system.
The main tanks contained either trace amounts, or were completely devoid, of fuel. The right auxiliary tank contained approximately 11 gallons, and the left auxiliary tank contained approximately 2 gallons. The recovered fuel was clear and bright, with no visible contaminants. Tests with water-detection paste were negative, which indicated that no water was present in the fuel.
The fuel selector valve handle for the front engine was found in the "Left Aux" position, and the corresponding fuel selector valve was found set to the port from the left auxiliary tank. The fuel selector valve handle for the rear engine was found in the "Right Main" position, and the corresponding fuel selector valve was found set to an unused port, which was the "off" position.
Here's the full report
http://www.ntsb.gov/ntsb/brief2.asp?...08FA184&akey=1
Weight and Balance Report
http://www.ntsb.gov/Dockets/Aviation...184/424353.pdf