A week after the crash of Air France Flight 447, the French and Brazilian navies conducted a detailed search at the Takhar checkpoint. They found more than 3,000 pieces of fuselage wreckage scattered on the sea, including wing fragments, most of the tail wreckage and some crew seats. In addition, they also found the bodies of 50 victims, some of whom were still wearing clothes and jewelry. Subsequently, the remains of the victims were sent to the Brazilian morgue, and the wreckage of the plane was sent to the warehouse of the French government in Toulouse, while the sparkling sea was still as unbreakable as a shield made of diamonds, and it was impossible to continue searching. Finally, French investigators began to seek the help of oceanographers.

At the end of April this year, after carefully analyzing the photos sent back from the Aluchiya, the French investigation department returned to the Tahar checkpoint and deployed a submarine where a black box of the wrecked passenger plane was salvaged. To be sure, the black box was salvaged somewhere underwater in this area, but the data of the black box was destroyed and the cylindrical object that kept the data was broken. On may 1 day, a black box was found near the seabed; On May 3rd, another cylinder with a black box was found and salvaged. This black box contains the sound recording from the cockpit. A few days later, two black boxes were sent to the basement of the French Bureau of Investigation and Analysis in Paris for research. Even after sleeping underwater for two years, the black box may still be deciphered by investigators.