US investigators focus on Max 9's bolts as airlines find loose parts

FAA Grounds Boeing's , 737 Max 9 Fleet , After Alaska Airlines Incident. 'The Guardian' reports that Boeing is back in the spotlight after an incident on an Alaska Airlines flight where a part of the plane's fuselage tore away mid-flight. The plane was one of Boeing's newest and best-selling models, the 737 Max. Just minutes after takeoff from Portland, Oregon, a door plug detached from the plane, leaving a gaping hole in the passenger cabin. The plane made an emergency landing, and no crew or passengers were injured in the incident. . According to accident investigators, the incident, which occurred at a relatively low altitude with all passengers still strapped in, could have been much more serious. . 'The Guardian' reports that the cause of the incident remains unknown. However, investigators have reportedly now located the missing door plug, which was recovered from the backyard of a local teacher. Following the incident, the U.S. Federal Aviation Administration grounded Boeing's fleet of 737 Max 9 planes. According to investigators, an auto-pressurization fail light on the aircraft had triggered three times in the two months it had been in service. . According to investigators, an auto-pressurization fail light on the aircraft had triggered three times in the two months it had been in service. . Prior to the incident, this information had prompted the airline to restrict that particular plane from making long flights over water