MIA91LA158

NTSB accident investigation · Air Tractor AT-301 · High Springs, FL · June 2, 1991

Accident · No injuriesLimited investigationFinal report
Date
June 2, 1991, 18:25 local (22:25 UTC)
Place
High Springs, FL
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N8841SAir Tractor AT-301
Weather
Visual (VMC) · Day
Status
Completed · report February 8, 1993
Report
Approved by Office Director
FAA report
19910602018769A
Case key
32881

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

Loss of engine power due to disintegration of the impeller caused by a worn impeller bearing.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of engine power(partial) - mech failure/malfManeuvering - aerial application
Eng assembly,blower/impeller/integral supercharger - wornCause
In flight collision with objectDescent - emergency
Object - tree(s)
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - ground

Analysis

A partial loss of power was experienced and the plt dumped the load of chemical. While attempting to land in a field, the loss of eng power became worse. The acft collided with trees then the ground. Exam of the eng revealed that the impeller was disintegrated. According to the mechanic who examined the eng, this was due to a worn bearing.

Aircraft

Registration
N8841S
Reported as
Air Tractor AT-301
Category
Airplane
Serial number
301-0212
Engine
P&W R-1340-AN1, 600 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Inmon, Lee
Registered owner
Inmon, Lee

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
50
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Flight hours
14,800 total · 4,200 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
270° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
81 °F, dew point -0 °F

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.

Other investigations on N8841S · 2

Matched to the same aircraft by N-number and date.