An Alaska Airlines flight returned to Portland, Oregon, soon after takeoff after it "experienced an incident," the airline said Friday.
Six crew members and 171 passengers were on board Flight 1282 bound for Ontario, California, the airline said.
The cabin became depressurized shortly after take-off and the pilots asked for an emergency landing, according to the transcript of an air traffic control call from LiveATC.net. A photo posted on social media appeared to show a hole in the fuselage next to a passenger seat.
"The safety of our guests and employees is always our primary priority," Alaska said in a statement, "so while this type of occurrence is rare, our flight crew was trained and prepared to safely manage the situation."
The Boeing 737 MAX 9 has been in service since October 2023, according to Federal Aviation Administration records.
The aircraft maker said it had a technical team standing ready help with the investigation.
"We are aware of the incident involving Alaska Airlines Flight 1282," Boeing officials said in a statement. "We are working to gather more information and are in contact with our airline customer."
National Transportation Safety Board officials said they were investigating what had happened.
This is a developing story. Please check back for updates.