Liver Wurst Drainage

We did Multiples laps on the area (1800 D+) and decided to exit by Liver Wurst drainage. We stopped 50 m above the entrance of the Drainage (alt. 1350 m), just top of the last roll to decide the better way to exit (Drainage or stay on the trees above). I went on the last slope, did 2 meters and heard a "pop" and see a fracture below my skis. My partner yelled at me too. I saw that it was a full feature and I straight line toward the bottom of the slope. I was able to ski and pass the moving snow, and stop on a safe spot. The Debris Stopped quickly at the bottom of the slope.

Wind slab 10-30 cm deep, 30 m wide, 40-50 m long, good size 1. We did multiples Hand shear tests during the day, got everytime moderate to hard results on a non planar break fracture. The upper snow pack was composed with 10-30 cm of soft snow (recent storm) above 10-30 cm of compacted snow (1F+). This layers were sitting on a hard crust with 2-5 cm of facets above. We didn't have, saw any signs of instability during our day. We expected this was the same slabs composition : 5-15 cm soft snow + 5-15 cm compacte snow sitting on a few cm of facets above a hard crust. The crust was just edge able.