The CEO of Air India sought to draw a line under rife speculation around the cause of last month's air disaster in Ahmedebad, saying the preliminary investigation had ruled out a mechanical cause for the crash.

Air India CEO Campbell Wilson reportedly said in an internal memo that the investigation into the crash of flight AI 171, which involved the Boeing Co.’s (BA) 787-8 Dreamliner jet, is “far from over.” According to a Reuters report,