This was mentioned early on the investigation... I wonder if there are any details on what the discrepancies might be?
Actually, not french investigators but Boeing and NTSB expressed their doubts:
Their doubts were based on a modification to the flaperon part that did not appear to exactly match what they would expect from airline maintenance records...French and Malaysian officials did not share the American hesitation, not least because no other Boeing 777 is unaccounted for
http://mobile.nytimes.com/2015/08/06...nion.html?_r=0
That could mean maintenance not performed by the book, but also could be something even more serious, americans had never been excited about.