According to TraqPak data released yesterday by aviation specialized services firm Argus, business aircraft flight activity climbed 7.9 percent last month versus a year ago. While this is more than the 4.8 percent year-over-year rise in April, the industry as a whole has not seen the double-digit increases in the first half of this year that several analysts predicted late last year. Activity was positive across all aircraft types: midsize jets led with a 13.6-percent increase over May 2009, followed by light jets (8.3 percent), large-cabin jets (5.2 percent) and turboprops (3.5 percent). Part 135 charter operators saw their flying climb by 8.6 percent, while Part 91 and fractional operators each logged a 7.9-percent increase. Notably, midsize jet activity at Part 135 charter operators soared by a whopping 24.6 percent. The only other double-digit increase was Part 91 midsize jets at 10.9 percent. Meanwhile, both Part 135 turboprop and fractional large-cabin jet flying decreased slightly year-over-year. Argus’s TraqPak data “is serial-number-specific aircraft arrival and departure information on all IFR flights in the U.S.”