Narrative:

I was grounded at ZZZ airport during the week after the attack on the world trade center. After the cancellation of the event several pilots monitored the frequently changing NOTAMS as we awaited release of the airspace. On saturday I was told that it was possible to return home if a flight plan was filed and victor airways were adhered to. I did this and found in flight that I was assigned IFR altitudes. I thought this might be for traffic or due to the events on september, tuesday. In retrospect I was probably on an IFR flight plan since I later noticed that VFR flight was still prohibited on this date. There were no conflicts or problems of any sort during the flight. The weather was cloudless over the entire route. I should have read the NOTAMS more closely.

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Original NASA ASRS Text

Title: AN EXPERIMENTAL ACFT PLT DEPARTED ZZZ ARPT ASSUMING HE WAS ON A VFR FLT PLAN. ONCE AIRBORNE HE WAS ISSUED IFR ALTITUDES, LEADING TO THE CONCLUSION HE WAS ON AN IFR FLT PLAN.

Narrative: I WAS GROUNDED AT ZZZ ARPT DURING THE WEEK AFTER THE ATTACK ON THE WORLD TRADE CENTER. AFTER THE CANCELLATION OF THE EVENT SEVERAL PLTS MONITORED THE FREQUENTLY CHANGING NOTAMS AS WE AWAITED RELEASE OF THE AIRSPACE. ON SATURDAY I WAS TOLD THAT IT WAS POSSIBLE TO RETURN HOME IF A FLIGHT PLAN WAS FILED AND VICTOR AIRWAYS WERE ADHERED TO. I DID THIS AND FOUND IN FLT THAT I WAS ASSIGNED IFR ALTITUDES. I THOUGHT THIS MIGHT BE FOR TFC OR DUE TO THE EVENTS ON SEPTEMBER, TUESDAY. IN RETROSPECT I WAS PROBABLY ON AN IFR FLT PLAN SINCE I LATER NOTICED THAT VFR FLT WAS STILL PROHIBITED ON THIS DATE. THERE WERE NO CONFLICTS OR PROBLEMS OF ANY SORT DURING THE FLT. THE WEATHER WAS CLOUDLESS OVER THE ENTIRE ROUTE. I SHOULD HAVE READ THE NOTAMS MORE CLOSELY.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.