Errors made by two Air India pilots before the plane’s fatal crash will reportedly be the focus of an investigation into the tragedy. All but one of 242 people board the Boeing 787 Dreamliner died when the aircraft plunged into a medical student hostel in a built-up suburb last month, less than a minute after take-off from Ahmedabad airport.

Indian investigators of the deadly Air India airliner crash that killed 260 last month told a meeting of lawmakers that the plane's black boxes were not damaged, two people familiar with the discussi...