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

Staff shortages and equipment failures at Newark Liberty International Airport have raised safety concerns in recent weeks.

United Airlines Chief Executive Scott Kirby told customers in an email Monday that it is “absolutely safe” to fly in and out of Newark Liberty International Airport following two weeks of technology and air-traffic control staffing issues that have plagued the New Jersey transit hub.

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.

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.

As few as three air traffic controllers were working at Newark Liberty International Airport Monday evening, according to a published report. That’s 11 fewer than the targeted amount for that time period, The New York Times reported.

EWR will see a reduction in flights as the Federal Aviation Administration works to upgrade technology at the airport and address safety

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.

"It is safe across the country and the back up procedures keep it safe," United CEO Scott Kirby said on Tuesday

BDL received three flights following a communications blackout at Newark Liberty International Airport in New Jersey on April 28.