AA 191 had a crack where the red dashed line is shown. May have been on the front side of the bearing.+++++++++++
Very close to the same area, within inches, but different. 191 had the same bearing lugs from the wing mount pushing vertically into the pylon structure causing deformation and a crack initiation point. This ultimately grew into a 10" long crack in the pylon structure which let loose on the final takeoff. UPS failure appears to be in the circular cross section that supports the spherical bearing.
The 191 failure could happen on a new plane / structure that was mishandled ONCE by improper maintenance. Once the crack was initiated, it was a matter of time. 191 crashed 2 months after the deadly maintenance procedure. UPS failure is too early to tell true root cause.
I'm not being a smart ass. The failures are different.
AA 191 had a crack where the red dashed line is shown. May have been on the front side of the bearing.Pylon aft bulkhead attach point failed, same as AA crash.