Boeing pulled eight 787 Dreamliners in August for repairs, discovering they did not meet structural-soundness "requirements for safe flight and landing," according to an FAA memo. Boeing has notified all airlines with 787 Dreamliners about the problems. The parts in question are "nonconforming" sections of "rear fuselage, or body of the plane, that fell short of engineering standards," One defect Boeing "didn't test how it produces shims, or material that fills gaps between barrel-shaped sections of the jets' fuselages, to ensure they meet requirements." Could affect GEnx production.