You wouldn’t know to look at it from the outside, but there’s a lot going on in Hangar 4 at Chicago Executive Airport (KPWK). This is one of two factory-owned service centers for One Aviation’s Eclipse very light twinjets. In any given 12-month period, nearly 150 of the 282 strong Eclipse fleet will pass through these unmarked doors or those at Eclipse’s Albuquerque, N...