Boeing expects 737 MAX-9 to fly in April as larger version takes shape

Boeing Co said on Tuesday it plans to fly its new 737 MAX-9 aircraft for the first time in April, a further sign the company will start delivering the large version of the workhorse plane in 2018. Delivery of the single-aisle 737 MAX models, which replace the current 737 "NG" introduced in 1997, is crucial for Boeing to hit the financial targets it has promised investors and to offset slowing output of some of its largest jets such as the 777 and 747. "We are anticipating our certification of th