dipperm0
Pin shear under fatigue or corrosion or.... highly un-probable but...has to be checked
Nothing is improbable at this stage of the investigation. Improper material, heat-treat. process finish, anti-corrosion coating, or any number of other causes. But also failure originating from corrosion pitting or wear originating from either the pin, bar or airframe fitting. There are numerous potential root-causes and it is way too early in the investigative process to try and guess the cause. Guessing never resolved a single accident investigation.
I have great faith in the ability of the investigation to determine the probable cause based upon the resources of all the entities involved. My thoughts are with all the families, colleagues and employees affected by this awful occurrence.