On 6 January 2024, the U.S. Federal Aviation Administration (FAA) issued an Emergency Airworthiness Directive, requiring U.S. operators to temporarily ground select Boeing 737 Max 9 aircraft for inspections following a midair incident involving the same model aircraft operated by Alaska Airlines. The directive affected 171 Max 9 aircraft worldwide. Out of the 65 Boeing aircraft belonging to Alaska Airlines, 18 have already returned to service after the necessary inspections. On the evening of 5 January, Alaska Airlines Flight 1282 returned to Oregon’s Portland International Airport (KPDX/PDK) and made an emergency landing after a door plug detached from the fuselage and caused a depressurization of the aircraft. The flight bound for Ontario, California, had departed the airport approximately 20 minutes earlier and was traveling at an altitude of about 16,000 ft (4,875 m). None of the 171 passengers and six crew members on board reported significant injuries. The National Transportation Safety Board (NTSB) is investigating the incident.