Investigators probing the fatal Air India Boeing 787 crash are focusing on the engine fuel control switches, according to reports. These switches, if pulled in flight, cut engine power. While the reports don't confirm the cause, experts suggest pilot error, a fuel system malfunction, or a cascading electrical failure are possibilities. A preliminary report is expected by Friday, though its detail is uncertain. The flight data and cockpit voice recorders will be crucial in determining the cause of the crash.

Prepared by Rachel Morgan and reviewed by editorial team.