Your old, reliable engine has been coughing up some strange, but concerning noises. So, you call your mechanic to find out what the problem and solution are to restoring its harmonious hum. But the ...

EAST HARTFORD, Conn., March 13, 2013 /PRNewswire/ -- Pratt & Whitney, a unit of United Technologies Corp. , together with its U.S. Air Force partner at the F119 Heavy Maintenance Center (HMC) at ...