A preliminary report into the deadly crash of an Air India jetliner in June is expected to be released by Friday, three sources with knowledge of the matter said, with one adding the probe had narrowed its focus to the movement of the plane's fuel control switches.

A meeting between top officials of Indias aviation is also likely to be conducted on July 8, where the mid-June crash in Ahmedabad could be discussed as well. While authorities search for answers at one of the biggest Air India crashes in modern time,

The much-awaited preliminary report on the devastating Air India crash, involving a Boeing Co. BA +1.68% Get Free Report airplane, in June, which claimed 260 lives, is expected to be released by the end of this week.