MIDDLETOWN, CT -- Pratt & Whitney has fielded a new F135 engine turbine blade coating to about 25% of the Joint Strike Fighter fleet and expects to complete the retrofit modifications by 2030. The company developed the new coating after some F-35s operating in sandy environments with higher temperatures and a higher concentration of particulates were showing signs of calcium-magnesium aluminosilicate (CMAS) degradation to the turbine blade coatings in their engine power modules, leading to unscheduled maintenance and early engine...