Dutch lawyers have big eyes on Boeing's pocket book. I wonder if they know that Boeing didn't build the LRRA.
The LRRA mfr bears responsibility for false altitude with no warning flag. However, the likelihood of a defect in the installation or maintenance shifts at least some of that responsibility to Boeing and/or Turkish.
Boeing is also solely responsible for how the output of the LRRA is used; in this case, depending on a single signal to trip the Retard.
GB