Narrative:

We took off from gai VFR and contacted dulles approach. Dulles cleared us to climb and maintain 8500 ft. I was looking at my map and climbed to approximately 8800 ft when I noticed the altitude and immediately descended to 8500 ft. Dulles did say we were cleared to 8500 ft -- obviously they saw our error.

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Original NASA ASRS Text

Title: A CORP PLT RPTS CLBING THROUGH ASSIGNED ALT. THE ACFT WAS IN CLASS B AIRSPACE AND THE PLT WAS DISTR WITH A CHART.

Narrative: WE TOOK OFF FROM GAI VFR AND CONTACTED DULLES APCH. DULLES CLRED US TO CLB AND MAINTAIN 8500 FT. I WAS LOOKING AT MY MAP AND CLBED TO APPROX 8800 FT WHEN I NOTICED THE ALT AND IMMEDIATELY DSNDED TO 8500 FT. DULLES DID SAY WE WERE CLRED TO 8500 FT -- OBVIOUSLY THEY SAW OUR ERROR.

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.