Fuel on the U206 is LEFT/OFF/RIGHT ie: you pass through "off" to change tanks.
Trying to pass the magnifying glass over this particular aspect of the prang via PPRuNe is pointless and - honestly - does it REALLY contribute to the body of pilot knowledge out there?
I have long been a PPRUNe speculator on prangs but maybe I'm getting older or something.... it's going to be one of a group of causes, we all know what those causes are. History tells us that for every 100 pilots who learn something from this (or any other prang) there will be 1 who repeats it.
Maybe I'll just shuffle off into the PPRuNe-set and STFU