NTSB Identification: MIA96LA163.
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Accident occurred Tuesday, June 25, 1996 in CALLAHAN, FL
Probable Cause Approval Date: 10/04/1996
Aircraft: Aeronca 7AC, registration: N84538
Injuries: 1 Uninjured.
NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.
While in cruise flight at 1,200 feet, the engine began to run rough. The pilot applied carburetor heat, and the engine roughness became worse. He immediately selected a field and began an approach for an emergency landing. During landing rollout in the field, the pilot made a turn to the left to slow the aircraft, and the right main landing gear collapsed. After the accident, the engine was started and operated to full power with no evidence of failure or malfunction. The carburetor heat operated normally during the postaccident engine run. The temperature and dew point were reported to be 95 and 73 degrees, respectively. According to icing probability charts, conditions were conducive to carburetor ice.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: the pilot's premature decision to reduce power, following application of carburetor heat, when engine operation became rougher after experiencing roughness due to carburetor icing. The weather (carburetor icing) conditions and carburetor ice were related factors. Full narrative available
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