A fatigue crack buried inside an engine mount can remain invisible until the instant it becomes catastrophic. That ...
Modern Engineering Marvels on MSNOpinion

The tiny MD-11 pylon crack that triggered catastrophe

A widebody freighter can survive enormous aerodynamic loads, but not every threat arrives as a dramatic overload. In the UPS ...
Boeing issued a 2011 service bulletin warning MD-11 operators about potential spherical bearing assembly failures in engine pylons, the same component now at the centre of the NTSB investigation into ...