Federal investigators will take a closer look at how the FAA deals with maintenance oversight of Allegiant Air.

A federal review ordered last June initially focused on the FAA’s oversight of air carrier maintenance, but Transportation Department officials said that initial reviews and requests from Congress members prompted them to “adjust the scope of this audit.”

The Department of Transportation’s announcement comes one month after a “60 Minutes” segment questioned Allegiant’s safety record, noting that the budget airline had logged more than 100 serious mechanical problems between Jan. 1, 2016 and October 2017, including rapid descents, engine failures and aborted takeoffs.