(Editor's note: This story has been updated to reflect the correct designation of the Rolls-Royce commercial engine and the location of the adaptive test bed.) OKLAHOMA CITY, OK -- In a cavernous manufacturing bay here, Boeing engineers can climb inside and around a B-52 Stratofortress bomber the Air Force loaned to the company from the boneyard. Having an actual aircraft on hand is allowing Boeing to more quickly and accurately identify problems and solutions for the two major overhauls...