The plane had a Garmin 430W - which therefore has Terrain Awareness. The data card was updated just a few week’s earlier by the same person who updates my own.
In a previous posting a picture clearly shows that ‘Terrain Awareness’ was not turned off since that activates a Warning Flag which was not visible.
I can only presume that the 430 was failing (Due to voltage drop?); but what were they then doing R/T on?
i cannot conceivably understand how two well experienced and qualified pilots would ignore such warnings if they appeared.
it is still a mystery - despite the Air Accident Report - what did/did not occur to cause such a sad outcome.