The air traffic control mishap early Friday morning added to disruptions in recent days that have intensified concerns about safety at one of the busiest U.S. airports.

Newark Liberty International Airport suffered another brief air traffic control outage Friday morning, the FAA confirmed.

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.

Radar screens at New Jersey's Newark Liberty International Airport went black again early Friday morning. The outage happened at 3:55 a.m. and lasted about 90 seconds, the Federal Aviation Administration said.

A brief radar outage for Newark Liberty International Airport is the latest in a string of air traffic control failures tied to aging infrastructure.

Audio transmissions captured air traffic controllers alerting at least two incoming planes that the radar screens had gone dark.

The failure was the second such incident in the past two weeks, amid continuing concerns over safety at the airport.

Travel woes at Newark Airport continued Monday after a weekend featuring another radar outage, a ground stop and dozens of flight cancellations and delays. The FAA announced Newark was operating on a ground delay program,