NTSB Identification: CHI99LA319.
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Accident occurred Monday, September 06, 1999 in GREENFIELD, IN
Probable Cause Approval Date: 06/21/2000
Aircraft: VAN GROUW WHITE LIGHTNING, registration: N25WL
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.

The pilot was flying the airplane on the first flight after an annual inspection to assure the airplane was operating properly. He reported the engine began losing power during the flight. Unable to maintain altitude the pilot made a forced landing in a corn field. Post accident inspection revealed the quick drain oil plug in the bottom of the oil sump was missing and oil exhaustion had occurred.

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

improper installation of the oil quick drain plug which resulted in oil exhaustion to the engine. A factor was the corn crop encountered during the forced landing.

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