Seattle, Washington - Boeing denies that the company already knew error in the MCAS system of the 737 MAXs.
An internal memo published on Oct. 18 revealed that one of the 737 MAX test pilots shared his concerns with a colleague about the erratic behavior of the MCAS system that he met during a simulator test on Nov. 2016.
It raised new questions about how much Boeing was aware of the problems with the 737 MAXs before the crashes.
With the release of the internal communication message, there had been a lot of indignation among congressmen, pilot unions and experts.
The Federal Aviation Administration (FAA) named the document as concerning and asked the American aircraft manufacturer for an urgent explanation for the delay in delivering the records of the internal communication.
Boeing said in a statement that there was a wrong interpretation and the company regretted not to include a clear explanation when the message was released to investigators earlier this year.
Boeing says he has contacted test pilot Mark Forkner he refused to talk to Boeing. But through his lawyer, Forkner said his comments were a reaction to the malfunctioning simulator program for the 737 MAX.
Maneuvering Characteristics Augmentation System (MCAS), a stall-prevention software developed for the 737 MAXs, led to fatal crashes in Indonesia and Ethiopia and killed 346 people.
Investigations have revealed that the MCAS software and the failure of the AOA (Angle of Attack) sensors caused pilots not being able to control the aircraft.
Boeing's 737 MAX jets have been globally grounded since March 13. The manufacturer is working on a software upgrade to return the aircraft to the service.