Narrative:

This flight was a direct route from lakeway airpark near austin, tx, to hondo municipal airport, a distance of about 90 mi. After topping off fuel and other usual preparations, we took off at XA15 and climbed to 4500 ft on course. About 35 mins later, the engine suddenly sputtered. I applied carburetor heat, but RPM kept deteriorating until all power was lost. The engine windmilled but would not restart. I called bulverde airport on unicom -- no answer. I broadcast on 121.5 -- no response. Approximately 5 mi to my right was the military auxiliary field at camp bullis, tx. We glided to this military field and landed on the runway there. The aircraft was not damaged and neither me nor my wife (passenger) were injured. This was a rented aircraft. We left our point of departure with full fuel tanks (gas slip available). Engine instruments were normal (good oil pressure) when the engine quit. I did not hear any clanking or roughness when the engine quit as is sometimes associated with an internal failure. At this time I do not know the cause of the engine failure. I did not land at the bulverde airport because it was 8-10 mi to my left. Camp bullis was much closer and obviously the correct choice.

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Original NASA ASRS Text

Title: PLT OF C150 EXPERIENCES ENG FAILURE NEAR AUSTIN.

Narrative: THIS FLT WAS A DIRECT RTE FROM LAKEWAY AIRPARK NEAR AUSTIN, TX, TO HONDO MUNICIPAL ARPT, A DISTANCE OF ABOUT 90 MI. AFTER TOPPING OFF FUEL AND OTHER USUAL PREPARATIONS, WE TOOK OFF AT XA15 AND CLBED TO 4500 FT ON COURSE. ABOUT 35 MINS LATER, THE ENG SUDDENLY SPUTTERED. I APPLIED CARB HEAT, BUT RPM KEPT DETERIORATING UNTIL ALL PWR WAS LOST. THE ENG WINDMILLED BUT WOULD NOT RESTART. I CALLED BULVERDE ARPT ON UNICOM -- NO ANSWER. I BROADCAST ON 121.5 -- NO RESPONSE. APPROX 5 MI TO MY R WAS THE MIL AUX FIELD AT CAMP BULLIS, TX. WE GLIDED TO THIS MIL FIELD AND LANDED ON THE RWY THERE. THE ACFT WAS NOT DAMAGED AND NEITHER ME NOR MY WIFE (PAX) WERE INJURED. THIS WAS A RENTED ACFT. WE LEFT OUR POINT OF DEP WITH FULL FUEL TANKS (GAS SLIP AVAILABLE). ENG INSTS WERE NORMAL (GOOD OIL PRESSURE) WHEN THE ENG QUIT. I DID NOT HEAR ANY CLANKING OR ROUGHNESS WHEN THE ENG QUIT AS IS SOMETIMES ASSOCIATED WITH AN INTERNAL FAILURE. AT THIS TIME I DO NOT KNOW THE CAUSE OF THE ENG FAILURE. I DID NOT LAND AT THE BULVERDE ARPT BECAUSE IT WAS 8-10 MI TO MY L. CAMP BULLIS WAS MUCH CLOSER AND OBVIOUSLY THE CORRECT CHOICE.

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.