United Technologies Corp on Monday won the reversal of a $657 million judgment imposed over decades-old claims accusing its Pratt & Whitney unit of overcharging the federal government on jet engines for the military. The 6th U.S. Circuit Court of Appeals in Cincinnati said the government did not prove damages from false statements allegedly made by Pratt when it competed in 1983 with GE Aircraft for a contract to supply engines for the F-15 and F-16 fighter jets.