Southwest Airlines has triggered the program launch of Boeing’s 737 Max 7 narrowbody by converting 30 options that it holds for the existing 737 Next Generation family into orders for the new model.

Business aircraft activity in the U.S. fell for the third consecutive month, with flying hours down slightly–by 0.4 percent–year-over-year last month, according to TraqPak data released on Friday by aviation services company Argus. As has been the trend for much of this year, Part 135 was the only operational category to experience a gain in flying activity, increasing 10.5 percent from a year ago and marking its seventh consecutive monthly increase. Part 91 activity was down 3.2 percent year-over-year, while fractional flying dropped by 10.6 percent, the Argus data shows.