SbestCFII
Line Up and Wait
ATC will expect you to fly the clearance you were given until you can contact them and cancel IFR. The reasons are as follows:
You are required to fly it, regardless of the flight conditions until you cancel or receive an amended clearance;
If you have lost communication capability, ATC will know what to expect when your squawk appears in their scope;
If you squawk never appears after you have received your departure clearance, and you haven't communicated with them, they'll start SAR procedures.
So the bottom line is, you are required to follow the clearance until you have reached an altitude where you can contact ATC and amend the clearance or cancel IFR, or unless an emergency forces deviation from the clearance. Unfortunately, a sudden encounter with "severe clear" doesn't
meet the criteria.
You are required to fly it, regardless of the flight conditions until you cancel or receive an amended clearance;
If you have lost communication capability, ATC will know what to expect when your squawk appears in their scope;
If you squawk never appears after you have received your departure clearance, and you haven't communicated with them, they'll start SAR procedures.
So the bottom line is, you are required to follow the clearance until you have reached an altitude where you can contact ATC and amend the clearance or cancel IFR, or unless an emergency forces deviation from the clearance. Unfortunately, a sudden encounter with "severe clear" doesn't
meet the criteria.