After Malaysia Airlines Flight 370 has vanished more than three years ago on March 8, 2014 from radar screens - we still don't know any more details about the whereabouts of said plane. The search operation for MH370 lasting over 1000 days until January this year is the largest in aviation history. It has cost more then $160 million and has been led by Australia, China and Malaysia.
Anyone who is interested in the detailed report of the Australian Transport Safety Bureau which was released today can read about the search below:
https://www.atsb.gov.au/media/5773565/operational-search-for-mh370_final_3oct2017.pdf
(440-pages PDF Document)