NEWARK, N.J. (WPIX) – Radar screens went black at Newark Liberty International Airport for the second time on Friday morning, a spokesperson for the Federal Aviation Administration confirmed to Nexstar’s WPIX.

The outage happened around 3:55 a.m. and lasted about 90 seconds, according to the FAA.

“There was a telecommunications outage that impacted communications and radar display at Philadelphia TRACON Area C, which guides aircraft in and out of Newark Liberty International Airport airspace,” the spokesperson said.

A ground stop was later issued for Newark Airport, along with two-hour-long delays for incoming flights.

As of Friday morning, 78 flights were delayed and 10 were canceled, according to Newark Airport’s flight tracker.

LaGuardia Airport and John F. Kennedy International Airport are also experiencing ground delays on Friday, the FAA’s website reads.

The second screen outage at Newark Airport comes after air traffic control radars briefly went down on April 29, causing workers to be “unable to see, hear, or talk to [planes]” for reportedly less than two minutes.

The FAA said earlier this week that it is installing new fiber optic data lines to carry the radar signal between its facilities in Philadelphia and New York. Officials said some of the lines connecting those two facilities are outdated copper wire.

And on Thursday, Transportation Secretary Sean Duffy announced a multi-billion-dollar plan to replace the nation’s aging air traffic control system to prevent problems like this from happening and give controllers modern technology.

The FAA said Tuesday in a statement to Nexstar: “Our antiquated air traffic control system is affecting our workforce. As Secretary Duffy has said, we must get the best safety technology in the hands of controllers as soon as possible. We are working to ensure the current telecommunications equipment is more reliable in the New York area by establishing a more resilient and redundant configuration with the local exchange carriers. In addition, we are updating our automation system to improve resiliency.”

The agency also said that some controllers who work with Newark have taken time off “to recover from the stress of multiple recent outages.”

“While we cannot quickly replace them due to this highly specialized profession, we continue to train controllers who will eventually be assigned to this busy airspace,” the FAA stated. 

The Associated Press contributed to this report.