Originally Posted by N9373M

Why on earth was a pop-up IFR not requested?

From the NTSB:

The pilot, age 47, held an airline transport pilot certificate with airplane multiengine rating, and a commercial pilot certificate with airplane single-engine land and airplane single-engine sea ratings. In addition, the pilot held a turbojet powered rating and type ratings in various transport category aircraft. A first-class airman medical certificate was issued on November 26, 2007, with the limitations stated, "must wear corrective lenses, not valid for any class after." The pilot reported on her most recent medical certificate application that she had accumulated 14,200 total flight hours.

EDIT: The report further states: Examination of the engine revealed that the number four cylinder exhaust valve was stuck in the open position and was bent. The camshaft was intact and each of the camshaft cam lobes exhibited severe wear and spalling signatures. The corresponding tappets exhibited severe spalling on their respective camshaft contact surfaces. The engine exhibited signatures consistent with a high time engine."

So that's probably why the jury did what it did - it was the engine's fault /sarcasm.