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.

According to a report published on Wednesday by The Wall Street Journal quoting sources close to United States officials’ early assessment of evidence, the black box audio recording of the last conversation between the two pilots indicates that the captain might have turned off the switches controlling the flow of fuel to the plane’s engines.

Air India CEO Campbell Wilson confirmed that no mechanical or maintenance faults were found in the AI171 crash. The airline has checked its entire Boeing 787 fleet and promised full cooperation in the ongoing investigation.

NEW DELHI, July 14 (Reuters) - A preliminary investigation into the crash of an Air India passenger jet last month that killed 260 people raises additional questions about the incident and the investigation is far from over, Air India's CEO said in a memo on Monday.

An Air India executive is still urging its staff not to jump to any conclusions as the investigation into the crash that killed 260 people last month continues. A preliminary report into the June crash found that the plane's fuel control switches had been flipped off one by one.

Air India's CEO Campbell Wilson addressed employees following the preliminary report on the AI 171 crash, which claimed 270 lives. The report found no

Air India's Chief Executive, Campbell Wilson, addressed employees regarding the AI171 crash. The preliminary investigation found no mechanical faults with the Boeing 787 Dreamliner. Checks were conducted on the entire 787 fleet.

An internal memo by Air India CEO Campbell Wilson highlights that the investigation into last month's Air India Dreamliner crash in Ahmedabad is ongoing. A preliminary report indicated cockpit confusion before the crash,