True Blue Power announced a Supplemental Type Certificate (STC) for the company’s TFC4000 Frequency Converter on Gulfstream G450, G550, G650 and G650ER aircraft. The TFC4000 is the lightest and quietest frequency converter in its power class. It provides up to 4,000 watts of wall outlet power to cabin equipment, and is a direct and more reliable replacement for existing GE Aviation Systems 717220-1, 717220-2, 717220-2R and Avionic Instruments 1-002-0102-2444 and 1-002-0102-2052 frequency converters.