Have you considered the fact that it may be pilot error?
They we taking off and the landing gear was still down when it should have been up and the flap settings weren't ideal for the conditions.
From the BBC
''In Ahmedabad, where temperatures neared 40°C (104F) on Thursday, the thinner air would have demanded higher flap settings and greater engine thrust, one pilot told the BBC. In such conditions, even a small configuration error can have catastrophic consequences.
CCTV footage which emerged late on Thursday afternoon showed the plane taking off from Ahmedabad, struggling to achieve altitude, and then slowly descending before crashing.
But a take-off roll with retracted flaps would trigger warnings from the 787's take-off Configuration Warning System, alerting the flight crew to an unsafe configuration, according to one pilot the BBC spoke to.
Ex-pilot Mr Chan told BBC Verify that the footage that has emerged so far is too distorted to establish for sure whether the flaps were extended, but said that such an error would be "highly unusual".
"The flaps are set by pilots themselves, before take off, and there are several checklists and procedures to verify the setting," Mr Chan said. "That would point to potential human error if flaps aren't set correctly."
Hopefully we don't get Indian pilots for out submarine business.
