Air India crash: investigators to focus on plane’s engine thrust, wing flaps and landing gear

Airline's maintenance regime will also be scrutinised as experts offer theories for cause of disaster

The official investigation into Air India flight 171 is focusing on the Boeing 787's engine thrust, wing flaps and landing gear, with the airline's maintenance regime also coming under scrutiny.

With one black box now retrieved from the wreckage of the plane, the Indian government's Air Accident Investigation Branch is looking at whether the aircraft's engine thrust and wing flaps failed, and why the landing gear remained open.