"It is safe across the country and the back up procedures keep it safe," United CEO Scott Kirby said on Tuesday

The award-winning new Terminal A may be the pride of Newark Liberty International Airport. But behind the scenes, the technology that’s keeping the planes in the sky is frighteningly out of date. Some of it relies on floppy discs and used parts sourced from eBay, federal officials said this week.

Newark Liberty has also been hit by runway construction, equipment outages and air-traffic-control staffing shortages that prompted urgent calls from lawmakers for investigations and new funding.

Transportation Secretary Sean Duffy says a new software update prevented a third radar outage over the last two weeks at New Jersey's busy Newark airport when a telecommunications line failed again over the weekend.

United Airlines CEO Scott Kirby reassured customers that Newark Airport is "absolutely safe" for travel in an email sent on Monday.

The airline told the Sun the e-mail was sent to passengers who have upcoming flights to or through Newark’s airport, as well as its MileagePlus

Transportation Secretary Sean Duffy plans to reduce the number of flights in and out of Newark Liberty International Airport for the "next several weeks."

The Federal Aviation Administration said on Monday it will propose flight cuts at Newark Liberty International Airport, citing air traffic controller staffing, runway construction and equipment issues.