The airplane was fueled before the pilot’s first flight that day. A total of 6.0 gallons of fuel were added to each fuel tank. After fueling, the pilot dipped each fuel tank using the provided dipstick, and determined that each tank contained between 7.0 and 7.5 gallons of usable fuel. He then flew one load of skydivers, returned, and attempted to secure the engine for fueling but was pressured by company personnel that he had enough fuel to make the second flight and that he needed to keep the airplane operating.
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