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breaking news in the Boeing investigation. Reports this morning that the black box data from that ethiopian airlines crash reveals a safety system was incorrectly activated that’s the same thing that happened on that failed lion air flight and ABC’s David Kerley starts us off with the latest on these new developments. Good morning, David. Reporter: Good morning, Amy. One aviation source telling ABC news there is a true link between these two 737 max crashes, a safety system activated that puts the jet in a nosedive which the pilots cannot recover from. The news first reported in “The Wall Street journal.” The wreckage and black boxes from the ethiopian airlines crash revealing this morning that those pilots too fought that safety system and lost. One aviation source telling ABC news that the Boeing 737 max’s anti-stall system did activate before the ethiopian airlines plane nosedived into the ground. That system known as mcas implicated in both the lion air crash and now ethiopian airlines as well claiming 346 lives in all. The system believing that the jet is stalling forces the nose of the aircraft down. In both crashes the pilots fought forcing the jet to make wild up and down movements. Boeing is developing a software update changing the way that safety system is triggered and making it easier for pilots to recover control. On Wednesday, Boeing demonstrated that software to airlines and customers. American airlines’ top pilot says it will make the jet even safer. The enhancements that have been put forward are going to be addressing the issues that have been at hand and I think that it’s — it will be a safe operation and it will be with confidence as well. Reporter: That software is expected to be certified by the FAA next week but at least American airlines says it could be two more weeks before the pilots and the jets return to the skies. Now, two sources tell ABC news that the ethiopians are expected to release their preliminary report as early as today. If there is any good news in this, it is that the software fix that Boeing is working on could address what caused both of these accidents, that there isn’t something additionally wrong with this 737 max. David Kerley on the story from the very beginning, thanks. We turn to president trump,
This transcript has been automatically generated and may not be 100% accurate.