Egypt Air’s preliminary investigation report shows. The flight state of the aircraft was normal during take-off, the maintenance of the aircraft was normal, the weather during the flight was normal, the pilot of the aircraft received strict passenger operation training, the pilot's passenger aircraft operated normally, and at the same time, the pilot performed the passenger aircraft while the passenger plane had problems. Explain the operation instructions in this state, but still does not regain control of the passenger aircraft, the pilot's operation is no problem. The passenger aircraft did not receive the impact of foreign objects or birds during the take-off process. For some comments, it was said that the damage caused by the impact of the birds and the accident eventually led to the rebuttal. These conclusions are based on the results of rigorous investigations. At the same time, these conclusions are based on the participation of Boeing companies. They are able to withstand the test, when excluding normal weather, people, external forces, After the operation and other problems, there is also a key factor is that the anti-stall system has been opened during the crash. This fact-oriented, the problem has become clear, and it is basically determined that the incident is due to the problem of the anti-stall system, resulting in the passenger aircraft. Crash, but, cautiously, there was no direct conclusion at the time, but it was announced later.