United Technologies Corp., the parent company of Connecticut-based Sikorsky Aircraft Corp., outpaced its competitors in the defense industry during the first quarter of this year with $4.7 million in lobbying expenses. The immigration bill orders up 15 of the famed Black Hawk helicopters that Sikorsky manufacturers at a cost of $17 million apiece. Over the years, United Technologies has been responsible for more than $10 million in campaign contributions and more than $100 million in lobbying expenditures, according to the company's profile on Influence Explorer. In 2012, the United Technologies PAC gave $220,000 to Senate candidates and about $30,000 to each of the party's Senate campaign committees. Former Sen. Alfonse D'Amato, R-N.Y., has served as a member of the UT lobbying team.