It doesn't have to be 12% sharp.We sometimes wait for a 14-15% i.e. if it was a quick turn-around (15 mins or less). A friend of mine that flies C208 in Kenya told me that mid-afternoon (when it's roasting...) they give their PT6 a good 20+ sec of dry-motoring to get "fresh" air in before putting the fuel on. They probably reach a 18-20% by then...
So yes, you won't know whether you had a NO-LIGHT until you move the condition lever to LOW-IDLE and you can see FUEL FLOW increasing but no ITT rise.
Nite
DK
