Hello, By twice approaching Cuesco, SPZO my device suddenly decided to descend as it was a depressurization of the cabin. I was at flight level 210 and on RNAV approach. On the G1000 the altitude flashed at 10800 or 10900 while the airport had to be at 10825ft of memory. I was also forced to put on the oxygen mask because I risked hypoxia. How to analyze this situation?
Thank you for your advice.
When I left SPZO yesterday, entering the cold and dark cockpit, I was asked to put on the mask or go down to a "safe" altitude.
Sincerely to all
