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April 17, 1989 · Air Tractor AT-301 · N4340S
Grangeville, ID
Overview
Report Status
Probable Cause
Event Type
Accident
Date
April 17, 1989
Injury Outcomes
1 injury (1 minor injury)
Location
Grangeville, ID
Aircraft
Air Tractor AT-301
Tail Number
N4340S
Operator
Thomas Hill
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
SEA89LA071
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.
NTSB Probable Cause
A PARTIAL POWER LOSS DUE TO A BLOWER FAILURE. A FACTOR RELATED TO THE ACCIDENT WAS THE SOFT FIELD CONDITION.
Full Narrative
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.
Flight
Event TypeAccident
Event Time09:15 PDT
Nearest AirportIdaho County (0nm N)
Runway7
Runway Length4800 ft
Runway Width60 ft
Flight Plan FiledNone
Aircraft FireGrd
Aircraft ExplosionNo
Aircraft
AircraftAir Tractor AT-301
Tail NumberN4340S
Aircraft CategoryAir
DamageSubstantial
OperatorThomas Hill
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsP&W · R-1340-AN-1 · Reciprocating · 600
Seats1
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 33 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind45° @ 2 kt
Visibility15 sm
CeilingBroken clouds 2500 ft
Temperature / Dew Point45 C / 0 C
Altimeter0
Weather SourceWIT