A preliminary report released on Saturday by India’s Aircraft Accident Investigation Bureau (AAIB) found that the fuel switches had moved from “run” to “cut-off” just one second apart shortly after take-off. However, it did not clarify how the switches were turned, and did not attribute fault.

A cockpit recording of dialogue between the two pilots of the Air India flight that crashed last month indicates the captain turned off the switches that controlled fuel flowing to the plane's engines,