NTSB Identification: CHI05CA259.
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Accident occurred Friday, September 09, 2005 in Grafton, IL
Probable Cause Approval Date: 12/20/2005
Aircraft: Dixon RV-4, registration: N9120Q
Injuries: 1 Minor.

NTSB investigators used data provided by various entities, including, but not limited to, the Federal Aviation Administration and/or the operator and did not travel in support of this investigation to prepare this aircraft accident report.

The airplane nosed over during a forced landing following a loss of engine power. The pilot reported the engine "started missing" and eventually "went dead" during cruise flight. The pilot stated that he switched fuel tanks, checked the magnetos, and applied carburetor heat to no avail. The pilot stated that he performed a forced landing into a soybean field and nosed over during the landing rollout. The engine was test run during a post-accident examination. The engine started and ran at idle for a period of five minutes with no anomalies. The engine subsequently ran at 2,100 rpm with no anomalies. The gascolator and carburetor inlet screen were contaminated with fragments of a red fabric-like substance. The red fragments were similar to a shop-cloth or scotch-brite abrasion pad.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

The loss of engine power due to contamination of the fuel system, gascolator and carburetor inlet screen. A factor to the accident was the soybean crop.

Full narrative available

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