Appeal Still Valid??

[tibear]

Question from another forum:

No outs, BR hits a triple but misses second base. F1, legally disengages the pitching rubber and throws wildly to second. As a result the ball ends up rolling to F8 who then throws to F4 who steps on second. While this is happening, BR runs home on the wild throw.

What is the resulting call? 1 out or 1 run??

Basically, did the error constitute a play and have the defense lose it right to appeal.