(Reuters) - The chief technology officer of United Technologies Corp , Paul Eremenko, has stepped down, just under two years after moving to the U.S. conglomerate from Europe's Airbus .The company confirmed the move in response to a query from Reuters after a person familiar with the matter said Eremenko was leaving UTC, the world's largest aerospace supplier and owner of jet engine maker Pratt & Whitney."Paul Eremenko has informed us of his intention to pursue opportunities outside the..