Then let me clarify my point.
There may be an "effort to shed some light", but did it come to fruition? Did Austrianwings find out anything on the issue it spreads rumours on? It would have befitted a reputable media house to wait until they had "hardened" their accusations instead of blaring them out as mere insinuations. Compare the title as well, bearing a question mark instead of a full stop. All those are signs of yellow press style journalism.
The same can be said for the anonymous quotations of supposed experts - a reputable publication would have at least stated that the name of the contribuant is known to them but not stated for some reason. Also, typically of Austrianwings, the article is not signed by any author, just "red" for redaction.
So again, Austrianwings is in my opinion not a reputable news outlet and should be in no ways considered authoritative when it comes to such an investigation.