U.S. Sen. Brian Schatz is asking officials at United Airlines not to outsource about 220 jobs in Hawaii.

Schatz announced Tuesday that he sent a letter to the CEO of United saying he would do everything in his power to protect those jobs.

United Airlines notified employees in March that the company is considering the possibility of outsourcing jobs at Lihue, Kahului, and Kailua-Kona airports.

United spokeswoman Christen David says the airline hasn’t made any decisions. She says the airline is in discussions with the union and is looking for ways to run a more efficient business.

But Schatz says United promised in congressional hearings that it would not cut jobs as a result of its 2010 merger with Continental Airlines. He says the airline’s recent decision contradicts those promises.