Nearly 200 airlines use 737-800s. Firefighters and rescue team members work near the wreckage of a passenger plane at Muan International Airport in Muan, South Korea, on December 29.

Southwest Airlines will equip new aircraft deliveries with the BL3710 economy class seat from RECARO. The Dallas-based airline will begin taking deliveries in 2025.

WASHINGTON — A Boeing 737 Max suffered damage to parts of the plane's structure after it went into a “Dutch roll” during a Southwest Airlines flight last month, U.S. investigators said Friday.