Business aircraft flight activity in the U.S. reversed course in July after trending in positive territory for much of the first half of this year, according to TraqPak data released yesterday by aviation services company Argus. Comparing year-over-year results, business aircraft flying was down 2.2 percent last month thanks to an 8.6-percent decrease in charter activity. This marks the sixth straight month that Part 135 charter flying has dragged down the overall results. The growth in Part 91 and fractional flying–which were up marginally by just 1 percent and 0.9 percent, respectively–wasn’t enough to offset the losses at Part 135 operators. By aircraft category, large-cabin jet activity continued its ascent, posting a 4.6-percent gain, while the midsize segment climbed by 3.6 percent. The light jet and turboprop segments fell 1.3 percent and 7.5 percent, respectively, year-over-year. Looking at individual market segments, fractional led in both gains and losses–fractional midsize jet activity was up 6.8 percent, but fractional light jet flying fell by a whopping 16.5 percent from a year ago. The Part 135 turboprop segment also posted a double-digit loss at -13.4 percent. Argus’s TraqPak data “is serial-number-specific aircraft arrival and departure information on all IFR flights in the U.S.”