Moving air traffic controllers means retraining them on the quirks of a new facility, and the process can take years.

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.

The Federal Aviation Administration (FAA) on Tuesday defended moving Newark Liberty International Airport’s airspace control to Philadelphia in a statement released in the wake of recent turmoil

According to the FAA, a telecommunications issue at the Philadelphia TRACON (terminal radar approach control) Area C facility, which guides aircraft in and out of Newark, caused the agency to issue the 45-minute ground stop.

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.

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

Transportation Secretary Sean Duffy keeps going on TV and insisting it’s safe to fly in and out of Newark Liberty Airport in New Jersey, despite a string of extremely frightening outages and workforce shortages recently. But Duffy has now admitted he changed a flight booked for his wife on Monday so that she wouldn’t have to travel through Newark.