A cabin blowout at 16,000 feet and the grounding of over 170 Boeing jets amplify airlines' frustrations with the planemaker's safety and supply issues. Alaska and United Airlines, with 70% of the MAX 9 fleet, cancel flights as provisional checks reveal loose bolts, potentially delaying the return to service. Boeing CEO Dave Calhoun acknowledges mistakes, anticipating a challenging period. Industry insiders suggest growing discontent with Boeing's repeated problems and production delays, urging airlines to explore alternative suppliers for risk reduction.
