미 항공당국 "보잉 737 맥스 부품결함"...교체명령<br /><br />U.S. aviation regulators have said there could be more faulty parts involving Boeing's 737 MAX airplanes, which have been grounded since March following two fatal crashes.<br />The U.S. Federal Aviation Administration said 148 leading-edge slat tracks used on Boeing's 737 MAX and 737 NG aircraft may have defects. <br />Leading-edge slats are movable panels that extend along the front of the wing to help takeoff and landing.<br />The FAA said it will require those parts to be quickly replaced. <br />
