U.S. safety agency investigating why Southwest Boeing plane rolled during flight

The U.S. National Transportation Safety Board said on Friday it is investigating why a Boeing 737 MAX operated by Southwest Airlines rolled during a flight last month.

U.S. safety agency investigating why Southwest Boeing plane rolled during flight
Roughly a dozen blue planes bearing the Southwest Airlines logo are grounded on a tarmac.

The U.S. National Transportation Safety Board said on Friday it is investigating why a Boeing 737 MAX operated by Southwest Airlines rolled during a flight last month.