Since our corrupt AFAC (Mexican aviation authority) most probably won't do any investigation at all, here's a summary of the information available online:
- From Flightaware it seems like he was maintaining an altitude of around 8000ft (+/- 500ft) until the very last minute in which the plane climbs (and the speed decreases).
- From a GOES-16 satellite image at the time of the accident, it seems that the area over the sierra was IMC
- From Google Earth and a Mexican VFR Chart you can tell there's lots of high terrain
The Sierra Gorda is one of the most beautiful natural parks in central Mexico but also a very tricky area to fly over, specially if the weather is marginal and the density altitude is high (temperatures in the area range between 20-25 degrees Celsius this time of the year)
It's always sad to hear that one of our colleagues dies in an accident, but at least we can try to learn about what happened and hopefully avoid putting ourselves in the same situation.
May his soul RIP