The investigation into the Air India Flight AI-171 crash, which claimed 260 lives, has expanded to include the possibility of sabotageBlack box data recovered from the wreckage is being analysed by Indian and US aviation experts to determine the causeAuthorities are examining every angle,

Three weeks after an Air India Boeing 787 crashed, investigators are still piecing together what went wrong. In the meantime, aviation safety experts have begun to narrow their thinking.

The official crash investigation is being led by Indian authorities, who currently hold exclusive access to the black box data and cockpit voice recordings recovered from the crash site. The final government report is still pending,