I included a link up-thread to a Reuters story that said "Sources who reviewed the crash data said the problems started barely 12 seconds after take-off. A sudden spike in black box data was consistent with a bird or other debris hitting the plane as it was taking off, shearing away a vital airflow sensor, said the four experts and two US officials."

https://www.smh.com.au/business/comp...08-p51bv0.html