The preliminary inspection and in turn this Emergency Airworthiness Directive points straight to the cause of the accident and in turn to maintenance. This may sound harsh but be your own judge on this one.
The procedure to be carried out, as prescribed in the EAD is a very basic one and every aircraft mechanic is supposed to do it while checking and or making adjustments on the rod end / push rod.
The two parts separated, so some one did not do the job. Very sad story.