No, the EAD in itself is nothing other than a timely and correct directive to inspect those components. It offers no opinion about cause or possible blame. It has been accepted by MB because they hace an excellent reputation and have saved hundreds of lives. Your speculation is ill-placed. If the investigators found a possible factor (not stated here) or simply an issue that needs investigation they are following sound procedures to follow up and ensure that there isn't a fleet-wide issue - it doesn't mean it was a cause in this tragic incident. A sensible precaution that has, as far as we know, no stated causal relevence to this case. You need to wait for official findings before drawing conclusions.