The anonymous sources, who were quoted by the newspaper on Thursday, said early assessments by American officials do not indicate a problem with either the aircraft or its engines.
Murlidhar Mohol, an Indian civil aviation official, told NDTV news channel in late June: “Nothing can be said about the cause of the crash right now because the investigation is going on.”
The WSJ report came ahead of authorities in India being handed a preliminary report into the crash on Friday.