Juan Browne at the Blanco Lirio channel did an initial analysis. The Learjet L35 is an older aircraft (this one was manufactured in 1989) that is increasingly difficult to maintain. The left main landing gear on the incident aircraft had previously experienced a failure. Mapping of ADS-B data shows the rate of descent on the visual approach was significantly higher than normal. Pilot got too high on approach and made a big correction close in. Possibly a hard landing that broke off the gear at its attachment point to the aircraft.
That happened in Dale Jr’s crash. Pilot Debrief u tube channel did a story on that crash a couple days ago.
Came in to hot. Plane caught fire and almost burnt them all up.
Approach to Scottsdale airport is pretty easy.
A bit surprised he had to push the landing.
Blancolirio report.
https://www.youtube.com/watch?v=e90eqkWYVSk
Anyone interested in these events should start with Juan Browne and at least subscribe to blancolirio on youtube.