Beechjet-400's are pieces of crap. Some stupid engineer (or maybe some business man incharge of the project) did not want to heat the fuel lines. Water freezes in the fuel line when the BE-400 gets to altitude, then BOOM, engine out! Now everyone who operates a BE-400 needs to pay an extra 6 cents a gallon for Prist. And trust me that adds up. Probably a lot more than the cost to heat the fuel lines. And definately if you ever forget to add prist to an aircraft, an engine out is a lot more costly than a few hundred dollars to heat the fuel lines. Oh well! Learn from the past so you don't repeat these mistakes in the future!!