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 over the weekend due to government equipment failures and air traffic control staffing issues.

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.

United Airlines, which has a hub at Newark, announced on May 2 that it would cancel 35 daily round-trip flights—representing about 10 percent of the flights operated by United out of EWR—due to the delays in order to protect their customers.