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.

United Airlines executives are trying to reassure their customers it is safe to fly at Newark Liberty International Airport, despite widespread cancellations and air traffic control issues continuing to spark concerns.

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