India’s initial findings into the crash of an Air India aircraft last month raise more questions, according to the airline’s Chief Executive Officer, who defended the fitness of the cockpit crew and the company’s track record of inspecting its fleet.

Investigators later found that the aircraft’s software had mistakenly interpreted the plane as being on the ground, triggering the thrust control malfunction accommodation system, which automatically moved the fuel switch from “run” to “cutoff” without any action from the pilots.