It’s described in the Code of Virginia. . .
“any flailing instrument consisting of two or more rigid parts connected in such a manner as to allow them to swing freely, which may be known as a nun chahka, nun chuck, nunchaku, shuriken, or fighting chain;”
http://leg1.state.va.us/cgi-bin/legp504.exe?000+cod+18.2-308
I wouldn’t worry about the blade so much as I would worry about the handle. That looks like something you use to shatter glass. At 37,000 feet, knocking out a window would be more devastating then trying to swing a sword.