I can troubleshoot most of what goes wrong up in the nacelle now. But the high-voltage side and the big gearboxes still stump me. I'm two hundred feet up, the manual isn't enough, and I don't want to be the one who guesses wrong on something that can kill me. I radio down more than I'd like to admit.
More people experience this than they realize.
You can handle most of the systems, but the high-voltage and complex drivetrains still stump you.
If this sounds familiar, the Library can help you find the bigger picture.