Narrative:

IFR flight plan to uncontrolled airport (2nc0). Descended from cruise altitude (9000 ft) to 7000 ft with asheville approach. When asked by controller if I had airport in sight, I said that I had the 'approach' to the airport, ie, I could proceed visually. He then said that I could proceed to the airport visually. I then descended from 7000 ft for the landing, followed by a call from approach that I had not been cleared to leave my assigned altitude. I then canceled IFR and landed. There was no traffic conflict. The problem arose when I misinterped his clearance to proceed to the airport visually to mean I was cleared for the visual approach. Had he said 'proceed to the airport visually, maintain 7000 ft,' I would have understood his intent better. Also, I would have canceled IFR immediately to remain in VMC to the airport.

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Original NASA ASRS Text

Title: C182 PLT, ON AN ASSIGNED RTE, MISINTERPS AVL CTLR'S CLRNC TO PROCEED DIRECT TO ARPT AS CLRNC TO DSND FROM ASSIGNED ALT.

Narrative: IFR FLT PLAN TO UNCTLED ARPT (2NC0). DSNDED FROM CRUISE ALT (9000 FT) TO 7000 FT WITH ASHEVILLE APCH. WHEN ASKED BY CTLR IF I HAD ARPT IN SIGHT, I SAID THAT I HAD THE 'APCH' TO THE ARPT, IE, I COULD PROCEED VISUALLY. HE THEN SAID THAT I COULD PROCEED TO THE ARPT VISUALLY. I THEN DSNDED FROM 7000 FT FOR THE LNDG, FOLLOWED BY A CALL FROM APCH THAT I HAD NOT BEEN CLRED TO LEAVE MY ASSIGNED ALT. I THEN CANCELED IFR AND LANDED. THERE WAS NO TFC CONFLICT. THE PROB AROSE WHEN I MISINTERPED HIS CLRNC TO PROCEED TO THE ARPT VISUALLY TO MEAN I WAS CLRED FOR THE VISUAL APCH. HAD HE SAID 'PROCEED TO THE ARPT VISUALLY, MAINTAIN 7000 FT,' I WOULD HAVE UNDERSTOOD HIS INTENT BETTER. ALSO, I WOULD HAVE CANCELED IFR IMMEDIATELY TO REMAIN IN VMC TO THE ARPT.

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.