Over the past two weeks, several equipment outages at the Philadelphia-based air traffic control center that guides planes to and from Newark Liberty International Airport, have raised questions on just how safe it is to fly at one of the nation’s busiest airports.

Newark airport's been plagued with issues that have travelers like me concerned about safety. It's not dangerous, but delays are a bigger concern.

Radar and telecommunications systems for Newark Airport’s air traffic controllers failed Friday morning — the second time the two critical systems went down at the same time in less than two

Several times over the last year, Newark controllers lost radar or radio service, leaving them unable to talk with planes they were tracking.

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.

There is more bad news for Newark Liberty International Airport. The FAA wants to keep reducing flights at the troubled airport for months to come.

Transportation Secretary Sean Duffy plans to reduce the number of flights in and out of the Newark Liberty International Airport for the “next several weeks,” as New Jersey’s largest airport struggles with radar outages and numerous flight delays and cancellations due to a shortage of air traffic controllers.

The shortage on Monday forced the F.A.A. to delay flights to the busy airport for up to nearly seven hours, the latest problem to plague the airport.