India, Nov. 15 -- L3Harris Technologies is facing scrutiny after US Transportation Secretary Sean Duffy questioned whether the contractor's mistake or faulty equipment caused Friday's nationwide FAA outage. The company had also worked with the US government on modifying a Qatar-gifted jet that could become President Donald Trump's new Air Force One.

US Transportation Secretary Sean Duffy said on Saturday that investigators are checking whether contractor "incompetence" or a faulty router caused Friday's air traffic control outage. The outage led to a rare nationwide ground stop that lasted about four hours.

Duffy said the failure happened during a network upgrade from copper to fiber wiring. A router that was being replaced began floodi...