Narrative:

The problem arose due to poor cockpit management on my part. I was IFR, alone and became distraction by an instrument that was behaving strangely. As I was watching this instrument, I shot through my assigned altitude and deviated my assigned altitude of 4000 ft by 600 ft -- 4600 ft. It was discovered when ATC notified me that I was still climbing and then cleared me to my main altitude of 7000 ft MSL. Corrective actions are better communication, and more attention to my scan, and to notify ATC of any difficulty that occurs.

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Original NASA ASRS Text

Title: SMA ACFT IN CLB, PLT DISTR BY AN INST ANOMALY AND ACFT CLBED THROUGH ASSIGNED ALT BY 600 FT. CTLR INTERVENED AND ISSUED NEW CLRNC.

Narrative: THE PROB AROSE DUE TO POOR COCKPIT MGMNT ON MY PART. I WAS IFR, ALONE AND BECAME DISTR BY AN INST THAT WAS BEHAVING STRANGELY. AS I WAS WATCHING THIS INST, I SHOT THROUGH MY ASSIGNED ALT AND DEVIATED MY ASSIGNED ALT OF 4000 FT BY 600 FT -- 4600 FT. IT WAS DISCOVERED WHEN ATC NOTIFIED ME THAT I WAS STILL CLBING AND THEN CLRED ME TO MY MAIN ALT OF 7000 FT MSL. CORRECTIVE ACTIONS ARE BETTER COM, AND MORE ATTN TO MY SCAN, AND TO NOTIFY ATC OF ANY DIFFICULTY THAT OCCURS.

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.