"Troubles Mount for Boeing 737 Max as United Airlines Uncovers New Issues"
United Airlines discovered loose bolts and installation issues on some Boeing 737 Max 9 jets after a mid-flight blowout forced an Alaska Airlines jet to return to Portland. The FAA grounded all Max 9s operated by Alaska and United, and some by foreign airlines. Inspections and repairs have been approved, potentially speeding up the return to service of the 171 grounded planes. Shares of Boeing and Spirit AeroSystems fell, and Alaska Airlines had to cancel 20% of its flights. The NTSB is investigating the incident, and Boeing CEO called for transparency and focus on addressing the causes to prevent future accidents.