The US aviation regulator has ordered the temporary grounding of some Boeing 737 MAX 9 planes for safety checks after a new Alaska Airlines plane lost part of its fuselageincluding the window, during the flight and had to make an emergency landing, according to Reuters.

A piece of fuselage broke off the left side of an Alaska Airlines ALK.N flight after takeoff from Portland, Oregon, to Ontario, California, forcing the pilots to turn around and land safely with all 171 passengers and six crew members on board. members of the board. The plane was in service for only eight weeks.

The FAA’s decision comes after all MAX family aircraft were grounded nearly five years ago as they struggled to recover from a security crisis and the pandemic.

“The FAA is requiring an immediate inspection of some Boeing 737 MAX 9 aircraft before they can return to service,” Federal Aviation Administration chief Mike Whitaker said Saturday.

“Safety will continue to guide our decisions as we assist the NTSB in its investigation of Alaska Airlines Flight 1282,” he added, referring to the National Transportation Safety Board.

Boeing BA.N said it supported the decision to immediately inspect 737-9s “with the same configuration as the affected aircraft.” The directive concerns 171 aircraft.