Fuel System Icing Inhibitor - Storage and Dispensing

Storage and Dispensing

It is extremely important to store FSII properly. Drums containing FSII must be kept clean and dry, since the additive is hygroscopic and can absorb water directly from moisture in the air. Since some brands of FSII are highly toxic, a crew member must wear gloves when handling it undiluted. Many FBOs allow FSII injection to be turned on or off so that one fuel truck can service planes that do require FSII as well as planes that don't. Line crew, however, must be able to deliver FSII when it is needed.

Such necessity was illustrated when a Flight Options Beechjet experienced a double flameout over the Gulf of Mexico in July 2004. The crew was able to glide to a lower altitude and restart the engines, and the aircraft landed safely. The FAA investigators found no mechanical problems with the engines, but when fuel samples were taken, FSII concentration was only 0.02%. Either the FSII injector in the refueler was not working at the FBO where the aircraft had received fuel, or the line staff failed to turn it on.