UPDATE 1-Pratt must push harder to cut F-35 engine cost -Pentagon
April 07, 2014 at 17:48 PM EDT
WASHINGTON, April 7 (Reuters) - Pratt & Whitney, the engine-making unit of United Technologies Corp, must redouble efforts to lower the cost of the single F135 engine it builds for the Lockheed Martin Corp F-35 fighter jet, a top U.S. military official said on Monday.