Serious Incident to the Boeing 737 registered N765SW and operated by Southwest Airlines on 03/06/2017 en route [Investigation led by NTSB / United States]

Preliminary data based on the notification from the United States authorities:

SWA experienced a right-hand engine (No. 2) accessory gearbox (AGB) failure. Examination of the airplane and engine after landing revealed that the No. 2 engine left fan inlet cowl exhibited a slice and the AGB exhibited an approximate 3-inch by 2-inch hole in the vicinity of the line 3 gear assembly.