Abstract: A method includes operating a gas turbine engine associated with an aircraft with a full authority digital electronic controller (“FADEC”) including operating systems that are critical to operation of the gas turbine engine for the aircraft, and systems that are less critical. The temperature is monitored in the FADEC, and operation of the non-critical functions reduced based upon the temperature of the FADEC approaching a limit. An assembly and a gas turbine engine are also disclosed.

Abstract: The invention provides processes for preparing and using an analytical tool for determining coke content on a catalyst composition. The analytical tool is particularly desirable in that it allows the determination of an average coke on catalyst level as well as a distribution of coke on catalyst levels of an unknown catalyst sample. The processes correlate color information with coke content, and provide an easy way to determine the amount of coke on the catalyst based on the color of the catalyst.