TUCSON, AZ, USA
N9917U
GRUMMAN AMERICAN AA-5A
A WITNESS OBSERVED THE AIRPLANE ENTERING DOWNWIND WITH SMOKE TRAILING BEHIND IT. THE PILOT COMMUNICATED TO UNICOM THAT: 'THE ENGINE HAS QUIT; I HAVE TO GET DOWN'. THE WITNESS THEN OBSERVED THE AIRPLANE MAKING A TIGHTER-THAN- NORMAL 'BASE TO FINAL' TURN. THE AIRPLANE NOSED DOWN AND SPUN TO THE GROUND. AN EXAMINATION OF THE AIRFRAME REVEALED NO MECHANICAL PROBLEMS. THE POWERPLANT WAS REMOVED TO A TESTING FACILITY. TEARDOWN OF THE ENGINE, ACCESSORIES, AND CARBURETOR REVEALED NO MALFUNCTIONS. THE CARBURETOR, PRIOR TO TEARDOWN, WAS INSTALLED ON A SIMILAR ENGINE AND WAS SATISFACTORILY RUN IN A TEST CELL. THE ACCIDENT OCCURRED IN FLAT TERRAIN.
Source: NTSB Aviation Accident Database
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