Narrative:

En route the engine started running rough with the egt at 700 degrees C. I enriched the mixture until the engine smoothed out. Since the engine had less than 50 hours on it, I figured my normal egt setting had changed. 5 hours and 25 mins into the flight the left tank ran out of gas. I informed ZDV of this and that I had about 30 mins of gas in the right tank. ZDV handed me off to springs approach and based upon headwinds, we decided that landing at pueblo would work out best. They handed me off to pueblo approach who radar vectored me to an ILS runway 8L approach. I broke through the clouds about 1000 ft AGL and reported the field in sight, landed and taxied to fuel. The right tank took 32.4 gals and the left 33.0 gals. Certainly not more than 10 mins of fuel. I had taken off with 6 hours and 45 mins of the fuel and would have ran out of gas after 5 hours and 55 mins. After refueling I flew on to colorado springs and the engine ran fine with the egt at 700 degrees C. I talked to a mechanic at colorado springs and he said I had induction icing. This is my first encounter with induction icing. The next time I encounter induction icing I will recognize it and take the appropriate action. Just as a point of reference, the left fuel gauge showed a little less than 1/2 a tank when it went dry. It was a good thing I was timing the tanks it allowed me to estimate my fuel remaining independent of the gauges.

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Original NASA ASRS Text

Title: PLT OF A MOONEY 201 REQUESTED A FLT ASSIST FROM ARTCC DUE TO LOW FUEL AND A ROUGH ENG CAUSED BY INDUCTION ICING. HE WAS DIVERTED TO THE NEAREST ARPT WHERE A SUCCESSFUL LNDG WAS MADE. AFTER THE ACFT WAS REFUELED IT REVEALED THAT THE ACFT ONLY HAD APPROX PT 6 GALS OF USABLE FUEL LEFT.

Narrative: ENRTE THE ENG STARTED RUNNING ROUGH WITH THE EGT AT 700 DEGS C. I ENRICHED THE MIXTURE UNTIL THE ENG SMOOTHED OUT. SINCE THE ENG HAD LESS THAN 50 HRS ON IT, I FIGURED MY NORMAL EGT SETTING HAD CHANGED. 5 HRS AND 25 MINS INTO THE FLT THE L TANK RAN OUT OF GAS. I INFORMED ZDV OF THIS AND THAT I HAD ABOUT 30 MINS OF GAS IN THE R TANK. ZDV HANDED ME OFF TO SPRINGS APCH AND BASED UPON HEADWINDS, WE DECIDED THAT LNDG AT PUEBLO WOULD WORK OUT BEST. THEY HANDED ME OFF TO PUEBLO APCH WHO RADAR VECTORED ME TO AN ILS RWY 8L APCH. I BROKE THROUGH THE CLOUDS ABOUT 1000 FT AGL AND RPTED THE FIELD IN SIGHT, LANDED AND TAXIED TO FUEL. THE R TANK TOOK 32.4 GALS AND THE L 33.0 GALS. CERTAINLY NOT MORE THAN 10 MINS OF FUEL. I HAD TAKEN OFF WITH 6 HRS AND 45 MINS OF THE FUEL AND WOULD HAVE RAN OUT OF GAS AFTER 5 HRS AND 55 MINS. AFTER REFUELING I FLEW ON TO COLORADO SPRINGS AND THE ENG RAN FINE WITH THE EGT AT 700 DEGS C. I TALKED TO A MECH AT COLORADO SPRINGS AND HE SAID I HAD INDUCTION ICING. THIS IS MY FIRST ENCOUNTER WITH INDUCTION ICING. THE NEXT TIME I ENCOUNTER INDUCTION ICING I WILL RECOGNIZE IT AND TAKE THE APPROPRIATE ACTION. JUST AS A POINT OF REF, THE L FUEL GAUGE SHOWED A LITTLE LESS THAN 1/2 A TANK WHEN IT WENT DRY. IT WAS A GOOD THING I WAS TIMING THE TANKS IT ALLOWED ME TO ESTIMATE MY FUEL REMAINING INDEPENDENT OF THE GAUGES.

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.