Narrative:

Had engine trouble at around 10;000 ft near conifer; co. Was able to restart and found that I was at about 9000 ft now which was only a few hundred feet above the ground. Could not explain reason for failure. Could not duplicate. Possible water in tanks or mixture too lean.

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Original NASA ASRS Text

Title: C172 pilot reports engine trouble over the Rocky Mountains. A thousand feet is lost before the engine is successfully restarted a few hundred feet above terrain.

Narrative: Had engine trouble at around 10;000 FT near Conifer; CO. Was able to restart and found that I was at about 9000 FT now which was only a few hundred feet above the ground. Could not explain reason for failure. Could not duplicate. Possible water in tanks or mixture too lean.

Data retrieved from NASA's ASRS site as of April 2012 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.