It comes after Monday's ground stop was also the result of equipment issues. They happened at the FAA airspace operations center in Philadelphia but added to the delays in Newark already caused by runway construction and air traffic controller staffing.
Controllers for Newark used to be based on Long Island before the FAA forced them to transfer. After two system outages just this week, many put in for medical leave, which led to the staffing crisis on Friday.
With fewer controllers, the FAA is forced to throttle the number of flights in the air. Far fewer are allowed than the airlines have scheduled.
A spokesperson for the Port Authority of New York and New Jersey issued the following statement in response to the ongoing travel issues: "The Port Authority has invested billions to modernize Newark Liberty, but those improvements depend on a fully staffed and modern federal air traffic system. We continue to urge the FAA to address ongoing staffing shortages and accelerate long-overdue technology upgrades that continue to cause delays in the nation's busiest air corridor."