United Airlines finds loose bolts on several Boeing 737 Max 9 planes

United Airlines discovers loose bolts and installation issues on some Boeing 737 Max 9 jets during inspections following a mid-flight fuselage blowout on an Alaska Airlines jet. The FAA grounds Max 9s operated by Alaska and United, as well as some flown by foreign airlines. The NTSB will examine the pressurization light issue and analyze the recovered door plug for further insights into the blowout incident.