NTSB Identification: SEA89LA071.
The docket is stored on NTSB microfiche number 38299.
Accident occurred Monday, April 17, 1989 in GRANGEVILLE, ID
Probable Cause Approval Date: 01/22/1991
Aircraft: AIR TRACTOR AT-301, registration: N4340S
Injuries: 1 Minor.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

A PARTIAL POWER LOSS OCCURRED DRG INITIAL CLIMB. THE PLT JETTISONED HIS LOAD & LANDED IN A SOFT FIELD ABOUT 3/4 MI FROM THE RWY, WHERE THE ACFT NOSED OVER. A FIRE ERUPTED, WHICH SELF-EXTINGUISHED MINUTES LATER. THE OPERATOR RPRTD THAT A 10 INCH DROP IN MANIFOLD PRESSURE HAD OCCURRED & THAT A SUSPECTED BLOWER FAILURE WAS THE REASON FOR THE POWER LOSS.

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

A PARTIAL POWER LOSS DUE TO A BLOWER FAILURE. A FACTOR RELATED TO THE ACCIDENT WAS THE SOFT FIELD CONDITION.

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