Narrative:

Runway trim caused 400 ft plus altitude deviation and was observed by center controller before the circuit breaker could be located to disable electric trim.

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Original NASA ASRS Text

Title: CPR SMT ALTDEV CAUSED BY RUNAWAY ELECTRIC TRIM.

Narrative: RWY TRIM CAUSED 400 FT PLUS ALTDEV AND WAS OBSERVED BY CENTER CTLR BEFORE THE CIRCUIT BREAKER COULD BE LOCATED TO DISABLE ELECTRIC TRIM.

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.