NTSB Identification: SEA99LA157.
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Accident occurred Thursday, September 09, 1999 in HILLSBORO, OR
Probable Cause Approval Date: 11/02/2000
Aircraft: Piper PA-23-160, registration: N4065P
Injuries: 1 Minor,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.

During the preflight inspection, water was found in the aircraft's main fuel tanks. After sumping the tanks several times, the pilots believed the water was removed. While maneuvering, the flight instructor intentionally failed and secured the right engine. A restart attempt of the right engine was unsuccessful and the pilots elected to return to the airport. While turning an approximate three mile final, the aircraft's left engine failed. Approximately one quarter mile from the runway, the student initiated a left turn permitting a forced landing to an open field. While in the left turn, the aircraft contacted the terrain. A post-accident inspection of the wreckage, revealed water in the aircraft's main fuel tanks and the carburetor bowls of both engines.

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

Loss of engine power due to fuel contamination.

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