Narrative:

I was on an IFR flight plan to rkd and I was cleared for the localizer 6. I started my descent and then the approach clearance was canceled. It was VFR so I canceled, but I advised there was a jet departing in the opposite direction so I stayed with approach for new vectors and climbed back to 2000 ft as assigned. I was realigned for the approach and was told to switch to the advisory frequency. After checking for traffic with approach, I canceled IFR and switched to advisory approximately 8 mi out. I was told the airport was closing in 5 mins for an airshow and I said I'd be landing in 3 mins. I successively reported inbound at 3 mi, 1 mi, back taxing, and clear of the runway. Although I did identify the airport as both rockland and knox county (I believe the official name is knox county) after shutdown I confirmed that there were no 'D' NOTAMS advising of the airport closure, no published NOTAMS. Only a (left) NOTAM saying there would be an aerobatic demonstration and avoidance was recommended. Somebody dropped the ball and it wasn't me.

Google
 

Original NASA ASRS Text

Title: PLT OF A PVT SMA TWIN FINDS OUT FROM ARPT UNICOM OPERATOR ON FINAL APCH THAT THE ARPT IS CLOSING IN 5 MINS!

Narrative: I WAS ON AN IFR FLT PLAN TO RKD AND I WAS CLRED FOR THE LOC 6. I STARTED MY DSCNT AND THEN THE APCH CLRNC WAS CANCELED. IT WAS VFR SO I CANCELED, BUT I ADVISED THERE WAS A JET DEPARTING IN THE OPPOSITE DIRECTION SO I STAYED WITH APCH FOR NEW VECTORS AND CLBED BACK TO 2000 FT AS ASSIGNED. I WAS REALIGNED FOR THE APCH AND WAS TOLD TO SWITCH TO THE ADVISORY FREQ. AFTER CHKING FOR TFC WITH APCH, I CANCELED IFR AND SWITCHED TO ADVISORY APPROX 8 MI OUT. I WAS TOLD THE ARPT WAS CLOSING IN 5 MINS FOR AN AIRSHOW AND I SAID I'D BE LNDG IN 3 MINS. I SUCCESSIVELY RPTED INBOUND AT 3 MI, 1 MI, BACK TAXING, AND CLR OF THE RWY. ALTHOUGH I DID IDENT THE ARPT AS BOTH ROCKLAND AND KNOX COUNTY (I BELIEVE THE OFFICIAL NAME IS KNOX COUNTY) AFTER SHUTDOWN I CONFIRMED THAT THERE WERE NO 'D' NOTAMS ADVISING OF THE ARPT CLOSURE, NO PUBLISHED NOTAMS. ONLY A (L) NOTAM SAYING THERE WOULD BE AN AEROBATIC DEMONSTRATION AND AVOIDANCE WAS RECOMMENDED. SOMEBODY DROPPED THE BALL AND IT WASN'T ME.

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.