The Aircraft Accident Investigation Bureau (AAIB) is expected to release its preliminary report this week on the Air India plane crash in Ahmedabad, which resulted in the deaths of at least 260 people.

According to sources, the report is expected to provide the sequence of events before the accident, a detailed description of the accident, and the steps so far in the investigation, along with any notable findings that may have come to light this far.

The investigation into the Air India flight 171 crash is focusing on the movement of the engine fuel control switches, following an analysis of the Boeing 787's flight and voice data recorders