• A Southwest Airlines flight returned to Denver after an engine cover ripped off mid-flight.
  •  The 737-800 aircraft involved is a previous-generation variant, not the recently scrutinized Max 9.

  • Southwest’s maintenance team is reviewing the aircraft while the FAA investigates.

Boeing 737 operated by Southwest Airlines had to turn around mid-flight after an engine cover ripped off on Sunday.

Southwest Airlines told Business Insider in a statement that Flight 3695 returned to the Denver International Airport and landed safely after experiencing a “mechanical issue.” The airline said its maintenance team is reviewing the aircraft.

“Our Customers will arrive at Houston Hobby on another aircraft, approximately three hours behind schedule,” Southwest said in the statement. “We apologize for the inconvenience of their delay, but place our highest priority on ultimate safety for our customers and employees.”

Video of the incident shared online shows a section of the plane’s engine cowling — a panel that covers the engine — tearing away from the aircraft.

In January, a part of the fuselage on Alaska Airlines Boeing 737 Max 9 fell off mid flight, raising concerns about Boeing’s quality control. The Max 9 is a different model from the Southwest 737- 800 that lost its engine cowling.”

The FAA said in a statement at the time that each plane would have to undergo an eight-hour safety inspection before it’s allowed to carry passengers again.

Boeing Chairman Steve Mollenkopf has reached out directly to several airlines following the company’s recent struggles, Bloomberg reported. Mollenkpf’s move came after Ryanair CEO Michael O’Leary said that Boeing showed a “lack of attention to detail.”

“In 2022 and 2023, we were finding little things like spanners under the floorboards, in some cases, seat handles missing, things like that,” O’Leary told CNN in March.

The FAA told Business Insider in a statement that it is investigating the incident. Boeing referred BI to Southwest Airlines when reached for comment on Sunday.

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