Boeing reportedly left engineers, officials unaware of 737 Max changes
They'd assumed there was more safety tech than there really was.
Bird strike may have triggered software issue in second 737 Max crash
An executive may have dismissed the idea after the first crash.
Boeing says its 737 Max software update is complete
It still needs FAA certification.
FAA 'tentatively' approves software fix for 737 Max jets
This also includes new training to handle the anti-stall system.