Yet another mandatory cost for what potential gain? And engine makers and airframe makers already do it, much like heavy equipment makers already do it. https:

Yet another mandatory cost for what potential gain? And engine makers and airframe makers already do it, much like heavy equipment makers already do it. https://www.boeing.com/commercial/aeromagazine/articles/qtr_03_09/article_07_1.html https://www.boeing.com/commercial/aeromagazine/articles/qtr_...