NTSB Identification: CHI94LA147.
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Accident occurred Thursday, May 05, 1994 in SIKESTON, MO
Probable Cause Approval Date: 02/24/1995
Aircraft: Air Tractor AT-402, registration: N91966
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 REPORTED THAT IMMEDIATELY AFTER TAKEOFF A TOTAL LOSS OF ENGINE POWER OCCURRED AND THE AIRPLANE PITCHED NOSE DOWN. THE AIRPLANE CONTACTED THE TERRAIN OFF THE LEFT SIDE OF THE RUNWAY. THE AIRPLANE WAS LOADED WITH 340 GALLONS OF A PROWL HERBICIDE/WATER MIXTURE WHICH SPILLED. INSPECTION REVEALED A FAILURE OF ONE COMPRESSOR BLADE WHICH OCCURRED DUE TO HIGH CYCLE FATIGUE. THIS BLADE FAILURE THEN RESULTED IN FURTHER COMPRESSOR AND TURBINE BLADE DAMAGE IN THE ENGINE.

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

a fatigue failure of a compressor blade which resulted in a catostrophic engine failure.

Full narrative available

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