NTSB Identification: MKC87LA137.
The docket is stored on NTSB microfiche number 34363.
Accident occurred Sunday, July 12, 1987 in BADERVILLE, MO
Probable Cause Approval Date: 10/07/1988
Aircraft: AIR TRACTOR AT301A, registration: N3169N
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.

DURING AN AERIAL APPLICATION OPERATION, THE PILOT EXPERIENCED A VIOLENT ENGINE VIBRATION. HE REDUCED POWER AND ATTEMPTED AN EMERGENCY LDG. ACFT NOSED OVER ON LANDING. THE PILOT EXITED AIRCRAFT THROUGH SIDE WINDOW. ACFT CAUGHT FIRE AND WAS DESTROYED. INVESTIGATION REVEALED APPROXIMATELY FOURTEEN INCHES OF PROPELLER BLADE WAS MISSING. METALLURGICAL EXAMINATION DETERMINED THE BLADE SEPARATION RESULTED FROM STRIKING AN OBJECT IN THE PAST WHICH RESULTED IN A CRACK THAT FINALLY SEPARATED.

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

PROPELLER SYSTEM/ACCESSORIES,BLADE..FAILURE,TOTAL

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

PROPELLER SYSTEM/ACCESSORIES,BLADE..SEPARATION


Contributing Factors

TERRAIN CONDITION..NONE SUITABLE


Contributing Factors

PROPELLER SYSTEM/ACCESSORIES,BLADE..PREVIOUS DAMAGE

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