Transportation

Southwest Air Flight ‘Dutch Roll’ Probed by US Regulators

A Southwest Airlines Boeing 737 passenger jet.

Photographer: Angus Mordant/Bloomberg
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Federal aviation safety officials are investigating a Southwest Airlines Co. flight that experienced an unusual rolling that may be linked to a damaged backup power control unit.

The Boeing Co. 737 Max 8 aircraft landed safely and there were no injuries among the 181 people on the flight between Phoenix and Oakland, according to information from the Federal Aviation Administration. Both the agency and the National Transportation Safety Board are looking into the May 25 incident, which happened at 34,000 feet.