Whoever did not latch the door properly after doing maintenance checks. Which is either a mechanic at the airline itself or someone at a maintenance hub that is contracted by the airline. Not the job of the manufacturer whatsoever.
The point s_dev is trying to make is that the designer can (and should) design things so that the mechanic "doesn't have to think". Seems like Airbus has evolved their design accordingly.
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Whoever did not latch the door properly after doing maintenance checks. Which is either a mechanic at the airline itself or someone at a maintenance hub that is contracted by the airline. Not the job of the manufacturer whatsoever.
The point s_dev is trying to make is that the designer can (and should) design things so that the mechanic "doesn't have to think". Seems like Airbus has evolved their design accordingly.
The solution is actually quite elegant: a long tagged key required to open the door which remains in the lock until it's closed again. https://safetyfirst.airbus.com/preventing-fan-cowl-door-loss...
So why did Airbus modify the door latch?
They were required to by an airworthiness directive. https://www.federalregister.gov/documents/2017/06/29/2017-13...
To make the plane more user friendly?