Question
First off, I've been lurking on this site for a long time ,and only recently joined. This thread is of particular interest. lets say one bought a C551 that is SP factory designed. Then lets say you do the Sierra Willams FJ44 mods and the fuel cell.. that adds some weight to the plane.... still single pilot ? I'd assume those new engines and the Sierra XR fuel cells are just STC added onto the original Airworthiness Certificate? Also lets say you upgraded the panels to all RVSM certified glass cockpit with new weather radar, improved a/p and the works on the best thats avail in glass panel gadgets that sierra offers.. like the L3 skywatch HP TCAS