‘Dutch roll’ incident on Boeing jet is being investigated The Washington PostFAA, NTSB investigate Southwest Airlines ‘Dutch roll’ incident USA TODAYInvestigation underway into rare, unsafe airliner roll experienced by a Boeing 737 Max CNNU.S. Investigating ‘Dutch Roll’ That Damaged a Boeing 737 During Flight The New York TimesSouthwest Airlines (LUV) Flight ‘Dutch Roll’ Probed by FAA, NTSB Bloomberg