NTSB Identification: CHI86FEE06.
The docket is stored on NTSB microfiche number 34519.
Accident occurred Thursday, August 28, 1986 in PLAINFIELD, IL
Probable Cause Approval Date: 03/10/1988
Aircraft: FRILING/COTHERN LONGEZE, registration: N45FC
Injuries: 1 Minor.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

THE PILOT MADE A STEEP RIGHT BANK WHILE ENTERING THE DOWNWIND LEG ON APPROACH TO LAND WHEN THE ENGINE QUIT AND THE PILOT WAS FORCED TO MAKE AN EMERGENCY LANDING IN A FIELD SHORT OF THE RUNWAY. UPON EXAMINATION OF THE FUEL SYSTEM THERE WAS A LACK OF FUEL IN THE LINES BETWEEN THE IN-LINE FUEL FILTER, ELECTRIC FUEL PUMP, ENGINE DRIVEN FUEL PUMP AND CARBURETOR. THE FUEL SYSTEM WAS PURGED OF AIR BY LOOSENING THE FUEL LINE AT THE CARBURETOR AND HAND CRANKING THE ENGINE. THE ENGINE WAS THEN STARTED AND RAN SATISFACTORILY. THE BUILDER OF THE EXPERIMENTAL AIRCRAFT STATED THAT IT HAD BEEN HIS EXPERIENCE THAT DURING A STEEP BANKED RIGHT OR LEFT TURN THE FUEL WILL PULL AWAY FROM THE FUEL SUMP OUTLET OF THE ENGINE, ALLOWING AIR TO ENTER THE FUEL LINES.

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

IN-FLIGHT PLANNING/DECISION..POOR..PILOT IN COMMAND



Contributing Factors

FUEL SYSTEM..STARVATION


Contributing Factors

OPERATION WITH KNOWN DEFICIENCIES IN EQUIPMENT..ATTEMPTED..PILOT IN COMMAND

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