The pilot had made a refueling stop at Vandalia, Illinois. She did not observe the refueling process, but the FBO also operated a King Air and she felt he knew the proper procedure to follow. The airplane was reportedly serviced with 235 gallons of Jet-A fuel (total capacity is 384 gallons). The pilot flew between 7,500 and 10,500 feet.

Read the NTSB report…