Accident Overview
A pilot reported that while cruising at 3,000 feet MSL, the engine began to sputter and subsequently lost power. In response, the pilot applied carburetor heat, switched fuel tanks, and turned on the fuel boost pumps; however, all restart attempts were unsuccessful. The pilot executed a forced landing in a rough field, during which the airplane sustained damage.
Postaccident Findings
A postaccident examination revealed evidence of fuel contamination. A brown-colored substance was found in the fuel sump drain. The engine was test-run using auxiliary fuel and auxiliary electrical power, and during this test run, the engine operated smoothly with no indications of malfunction.