[Skyraider3D]

Yes Mike, I think you're right. I couldn't understand this as a landing accident but a collision from behind makes good sense. It's easy to visualise now too. The rudder was hit first by the wingtip, which then went on to tear through the rear fuselage, bouncing off the bulkhead (and thereby breaking the fuselage) after which the stump of the wing scratched the side of the cockpit and knocking off the canopy altogether.
The propeller meanwhile tore through the entire left wing after giving the horizontal stabiliser a good kick or two (note the two creases in the tip of the left horiz. stab.).

Additional evidence to support this theory comes from the fact that there are indeed TWO loss entries for 4 July:
04Jul45 FG-1D 88399 VMF-113 Ie Shima Empire 2nd Lt. Martin W. Harke
04Jul45 FG-1D 88441 VMF-113 Ie Shima Empire 1st Lt. Russell Hunchar

It would indeed look like Harke and Hunchar accidentally crossed paths... Seeing as Hunchar's name is recorded he was probably inside the aircraft at the time of the accident. This could have been static, before take off or shortly after landing. Either way it was a ground collision.

It all makes sense now. Thanks Mike for solving this mystery!