I found this link a short while ago.
http://www.mercurynews.com/peninsula/ci_14416855?nclick_check=1
Read the entire article as down a ways a pilot who operates off that field describes the weather 100 and 1/8th and the noise abatement climb and turn to the right over the bay.
There is a map at the bottom with the take off direction and crash site indicated.
Looks like left engine failure very close to the ground, like maybe at 100 to 200 ft.
Artificial horizon failure could result in the same thing, but I suspect the engine.
Nice catch. I didn't know the departure procedure was a right turn. It makes sense, given the power lines.
That's the same map that I linked -- I think it was created by a Mercury News reporter and embedded in the article. I've also seen that map embedded in articles from other sources.
I suspect the engine as well. If he didn't react fast enough, he would have have turned left unintentionally.
(Disclaimer: I'm not rated for multi-engine flight)