A preliminary report released last week included detail about the fuel, saying that the fuel to the plane's engines appeared to have been shut off.

The left engine separated from the aircraft and struck the north corner of this building at ground level. The aircraft's right engine was found resting beneath a concrete water tank on the building's rooftop. The tail section of the aircraft was found embedded in the building's northeast wall and was later moved to the ground.

With conclusive information hard to come by weeks after the fatal Air India crash, the aviation industry has shifted its focus to possible pilot error.