Narrative:

While on a VFR flight and ADIZ clearance exiting the baltimore/dc ADIZ at 2000 ft MSL, approximately 27 NM on the balance 140 degree radial, straight and level flight, I was notified by potomac ATC that I was clear of the ADIZ, squawk VFR and frequency change was approved. I acknowledged and squawked VFR but still continued to monitor potomac ATC and 121.5 MHZ. No further xmissions from potomac were detected. I continued on my heading of 140 degrees. I crosschecked my GPS display, aeronautical charts and visual reference to the ground to confirm that I was outside the ADIZ. I thought that potomac ATC might have cleared me to be outside the ADIZ too early, but was unsure and complied with potomac ATC instructions nonetheless. A third party government agency (unknown at the time of this writing) was also monitoring the airspace and the FAA harrisburg FSDO is now (+5 days after my flight) interested in 'talking to me about my flight.' while I had complied with all ATC instructions (attained a preflight briefing, filed ADIZ flight plan and followed departure instructions), it appears that if ATC makes a mistake, the pilot is to be blamed for complying with ATC. It is also interesting to note that on a return flight that same day, there was no mention of any problem earlier that day by potomac ATC.

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Original NASA ASRS Text

Title: PLT OF C172 MAY HAVE BEEN AUTH TO SQUAWK VFR PRIOR TO DEPARTING THE DC ADIZ.

Narrative: WHILE ON A VFR FLT AND ADIZ CLRNC EXITING THE BALTIMORE/DC ADIZ AT 2000 FT MSL, APPROX 27 NM ON THE BAL 140 DEG RADIAL, STRAIGHT AND LEVEL FLT, I WAS NOTIFIED BY POTOMAC ATC THAT I WAS CLR OF THE ADIZ, SQUAWK VFR AND FREQ CHANGE WAS APPROVED. I ACKNOWLEDGED AND SQUAWKED VFR BUT STILL CONTINUED TO MONITOR POTOMAC ATC AND 121.5 MHZ. NO FURTHER XMISSIONS FROM POTOMAC WERE DETECTED. I CONTINUED ON MY HDG OF 140 DEGS. I XCHKED MY GPS DISPLAY, AERO CHARTS AND VISUAL REF TO THE GND TO CONFIRM THAT I WAS OUTSIDE THE ADIZ. I THOUGHT THAT POTOMAC ATC MIGHT HAVE CLRED ME TO BE OUTSIDE THE ADIZ TOO EARLY, BUT WAS UNSURE AND COMPLIED WITH POTOMAC ATC INSTRUCTIONS NONETHELESS. A THIRD PARTY GOV AGENCY (UNKNOWN AT THE TIME OF THIS WRITING) WAS ALSO MONITORING THE AIRSPACE AND THE FAA HARRISBURG FSDO IS NOW (+5 DAYS AFTER MY FLT) INTERESTED IN 'TALKING TO ME ABOUT MY FLT.' WHILE I HAD COMPLIED WITH ALL ATC INSTRUCTIONS (ATTAINED A PREFLT BRIEFING, FILED ADIZ FLT PLAN AND FOLLOWED DEP INSTRUCTIONS), IT APPEARS THAT IF ATC MAKES A MISTAKE, THE PLT IS TO BE BLAMED FOR COMPLYING WITH ATC. IT IS ALSO INTERESTING TO NOTE THAT ON A RETURN FLT THAT SAME DAY, THERE WAS NO MENTION OF ANY PROB EARLIER THAT DAY BY POTOMAC ATC.

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.