[N5ZX]

Questions:
The accident A/C was using rwy 32.

The debris field was distributed along a 360 heading from the departure end of the rwy indicating a right deviation from a 320 rwy heading...right wing was lower than left (right bank).

The right wing tip seperated from the right wing and seems to have peeled up and rolled over the fuselage, impacting the rear engine nacelle. This would seem to indicate that the bottom of the wing was the "leading edge", otherwise wouldnt the seperated portion have impacted further back on the A/C...like on the tail boom, etc.

The NTSB preliminary report says that the right wing spars show indications of DOWNWARD bending...the seperated portion folded UP and over....what could cause that?

The plane flew a perfect, pattern. Descended at an unacceptable speed with Flaps and gear up and spoiler apparently not deployed...they were TRYING to go fast.
15:44:19 332* 900' 120kts....I normally climb at 100
15:44:50 240* 1100' 137kts....I normally do cross-wind at about 110
15:46:50 156* 1400' 148kts....I normally start slowing to 100 around mid-field..
15:47:00 062* 600' 171kts....My base-leg is 100... 100 on final...90 over the fence....80 on the numbers (or somewhere there-abouts).

The last radar return had them on Base-leg at 600' msl (450' above Field Elevation) at 171kts and accelerating.

Max maneuvering speed for a "normal" P337 is 155kts. Max Maneuver for the Aviation Enterprises wing tip extension tanks (if empty) is placarded at 125kts.

And to make a 90 degree turn and descend 800' in 10 seconds (according to the radar sweeps) sounds like "abrupt maneuvers" to me.

Could this HARD left descending turn (forcing the right wing up) have flexed the right tip downward.... bending the spar, weakening it but still allowing the pilot to maintain the controlled high-speed low pass along the rwy until he pulled up "sharply" and the weakened spars gave-way?

Certainly not arm-chair quarterbacking....just trying to get my head around the physics and aerodynamics and yall seem to be excellent resources.

Thoughts?
Cole