Narrative:

Engine roughness, started descent and checklist, enriched mixture and added carburetor heat, problem went away. I continued to climb out, circle for altitude and continued to dsv. Cause: excess lean mixture and possible carburetor ice.

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Original NASA ASRS Text

Title: PLT OF AN SMA SEL DSNDED BELOW THE MSA DUE TO ROUGH RUNNING ENG. POSSIBLE CARB ICE.

Narrative: ENG ROUGHNESS, STARTED DSCNT AND CHKLIST, ENRICHED MIXTURE AND ADDED CARB HEAT, PROB WENT AWAY. I CONTINUED TO CLB OUT, CIRCLE FOR ALT AND CONTINUED TO DSV. CAUSE: EXCESS LEAN MIXTURE AND POSSIBLE CARB ICE.

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.