--In June 2009, Air France Flight 447 plunged into the Atlantic Ocean, killing all 216 passengers and 12 aircrew in the deadliest plane crash in Air France history.
Rescuers only managed to retrieve bodies and debris from the plane after several days, while investigators took nearly two years to get to the main wreckage including black boxes.
---While authorities were able to locate the first major wreckage within five days of the accident, initial investigation was hampered because the aircraft's black boxes were not recovered from the ocean floor until May 2011, nearly two years late
“xxxx年以来的民航史上,这么长时间找不到一架777-200大型客机的情况还没有过”,这样表述才确切。否则仅是二战期间各国失踪的飞机,像美国,找了几十年了,都还有没找到的呢。