The Federal Aviation Administration said it was requiring immediate inspections of Max 9 planes operated by U.S. airlines or flown in the United States by foreign carriers. The FAA’s emergency order, which it said will affect about 171 planes worldwide, is the latest blow to Boeing over the Max lineup of jets, which were involved in two deadly crashes shortly after their debut. On Friday, a window panel blew out on an Alaska Airlines Boeing 737 Max 9 seven minutes after takeoff from Portland, Oregon. The rapid loss of cabin pressure pulled the clothes off a child and caused oxygen masks to dro…