NTSB Identification: CHI08CA213.
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Accident occurred Tuesday, August 12, 2008 in Ida Grove, IA
Probable Cause Approval Date: 09/26/2008
Aircraft: Air Tractor AT-401, registration: N45029
Injuries: 1 Uninjured.

NTSB investigators used data provided by various entities, including, but not limited to, the Federal Aviation Administration and/or the operator and did not travel in support of this investigation to prepare this aircraft accident report.

The pilot stated that the engine was producing 36 inches of manifold pressure and 2,250 rpm during the initial takeoff. Shortly after takeoff, he noticed the airplane was not climbing and the manifold pressure dropped to 28 inches or less. The pilot landed the airplane in a soybean field and after a ground roll of about 100 feet, the airplane contacted an embankment. The airplane twisted to the right and became airborne for a distance of approximately 100 feet prior to contacting the terrain and sliding to a stop. Post accident inspection of the airplane revealed the turbocharger blower had failed.

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

A failure of the turbocharger blower which resulted in the partial loss of power. Factors associated with the accident were the low altitude of the airplane and the embankment.

Full narrative available

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