Sina US Stock News reported on the 10th Beijing time,BoeingHundreds of internal emails were released on Thursday showing that its employees had been very concerned about the development process of the 737 Max simulator and questioned the safety of this type of aircraft, triggering anger among members of the US Congress.

The emails are part of a more than 100 page document submitted by Boeing to the US Senate and House Committee on Thursday and made public, including Boeing's apology statement.

Boeing said that these public documents do not reflect the current state of the company and are completely unacceptable. The company regrets the content of these communications and apologizes to the US Federal Aviation Administration, Congress, passengers, and the public.

Many emails are in 2017 and 2018, discussing the development process and quality of the 737 Max aircraft simulator.

In an April 2017 email, two Boeing employees expressed their dissatisfaction with the 737 Max, saying “This plane was designed by a clown and supervised by a monkey.”

Some information details the development issues of the Boeing 737Max simulator and suggests that Boeing obtain approval from the FAA under false pretexts.

One of the employees said in a 2018 email, “I still haven't been forgiven by God because I did a cover-up job last year,” apparently pointing at the Federal Aviation Administration (FAA) covering up the 737Max problem.

Boeing said earlier that after repeated testing, all Max simulators are working effectively, and they are confident about this. However, after these documents are made public, Boeing may once again face delays if it wants the 737 Max to resume flights.

Another employee asked a colleague in an email, “Will you schedule your family on the MAX simulator training flight? I wouldn't.” His colleague also answered “No.”