A way of stating confidence in the product without giving away any insight.
At this stage, people involved in the investigation have no doubt gotten a handle on what parts were present, missing, broken, etc.
The next questions are the hardest, establishing the "why", and the nature. Broken could be because it was weak by defect, fatigue, overload. But missing pieces tell a different story, and require different solution. In that sense, even if found to be 100% related to maintenance, it would not be unheard of to recommend a re-inspect to the existing criteria. Most operators would already be doing it on their own.