United Airlines CEO Scott Kirby said on Friday that the carrier will begin canceling 35 flights a day - or about 10% - at its Newark hub starting this weekend due to government equipment failures and air traffic control staffing issues.

United is Newark Airport‘s largest carrier. Cutting 35 flights means slashing about 10% of its daily agenda at the airport, where the airline flies an average of 328 flights a day. A spokesperson for the Port Authority of New York and New Jersey, which manages New Jersey’s airports, did not immediately respond to a request for comment.

United has been urging the government to limit the number of flights to what an airport can realistically manage based on staffing, CEO Scott Kirby said.