DFW08CA104

NTSB accident investigation · Air Tractor AT-602 · Paragould, AR · April 20, 2008

Accident · Serious injuriesData collectionFinal report
Date
April 20, 2008, 18:30 local (23:30 UTC)
Place
Paragould, AR
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N8517MAir Tractor AT-602
Defining event
Maneuvering-low-alt flying: Low altitude operation/event
Weather
Visual (VMC) · Day
Status
Completed · report May 28, 2008
Report
Approved by Office Director
FAA report
20080420831819A
Case key
67848

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

The pilot's failure to maintain clearance from electrical wires while maneuvering. Contributing to the accident were binding of the elevator control, inadvertent stall and trees.

Findings · 5

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Object/animal/substance: wireEnvironmental issues › Physical environment · Not specifiedAir Tractor AT-602: 10 casesAll aircraft: 588 casesProbable cause
Performance/control parameters: airspeedAircraft › Aircraft oper/perf/capability · Not attained/maintainedAir Tractor AT-602: 5 casesAll aircraft: 1,681 casesProbable cause
Object/animal/substance: tree(s)Environmental issues › Physical environment · Not specifiedAir Tractor AT-602: 2 casesAll aircraft: 933 cases
Performance/control parameters: altitudeAircraft › Aircraft oper/perf/capability · Not attained/maintainedAir Tractor AT-602: 11 casesAll aircraft: 1,310 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot was spraying a field when he struck a set of electrical wires with the right wing and elevator. The airplane remained controllable except for a slight vibration, and the pilot elected to return to the operator's private airstrip located about 6-7 miles away to assess the damage. While on final approach, he heard a slight thump and realized the elevator control had locked up. The pilot was able to break the controls loose, but they felt stiff. The airplane veered off course and headed toward a center pivot that was located just east of the airstrip. The pilot added power to clear the pivot and the nose of the airplane pitched up sharply. The pilot was able to regain control and level off, but he needed to place both hands on the control column to offset the pressure. The pilot then headed toward an open field south of the private airstrip in an attempt to make an emergency landing. He called the operator on the radio and stated that something was coming apart on the airplane and that the outcome of the situation was not going to be good. Shortly after, with both hands and his knee on the control column, the pilot heard a popping sound and the airplane pitched up almost vertically. The airplane then stalled and descended toward the ground at a very steep angle The airplane collided with trees and came to rest near a small body of water. The airplane sustained structural damage to both wings, and the tail section had partially separated and was displaced about 90 degrees. The pilot stated that if it were not for the fact that he was wearing a helmet and his shoulder harness, his injuries would have been much more severe.

Factual narrative

The 48-year old commercial pilot was spraying a field when he struck a set of electrical wires with the right wing and elevator. The airplane remained controllable except for a slight vibration, and the pilot elected to return to the operator's private airstrip located about 6-7 miles away to assess the damage. While on final approach, he heard a slight thump and realized the elevator control had locked up. The pilot was able to break the controls loose, but they felt stiff. The airplane veered off course and headed toward a center pivot that was located just east of the airstrip. The pilot added power to clear the pivot and the nose of the airplane pitched up sharply. The pilot was able to regain control and level off, but he needed to place both hands on the control column to offset the pressure. The pilot then headed toward an open field south of the private airstrip in an attempt to make an emergency landing. He called the operator on the radio and stated that something was coming apart on the airplane and that the outcome of the situation was not going to be good. Shortly after, with both hands and his knee on the control column, the pilot heard a popping sound and the airplane pitched up almost vertically. The airplane then stalled and descended toward the ground at a very steep angle The airplane collided with trees and came to rest near a small body of water. The airplane sustained structural damage to both wings, and the tail section had partially separated and was displaced about 90 degrees. The pilot stated that if it were not for the fact that he was wearing a helmet and his shoulder harness, his injuries would have been much more severe.

Aircraft

Registration
N8517M
Reported as
Air Tractor AT-602
Category
Airplane
Serial number
602-1126
Engine
Pratt & Whitney PT6A-60AG, 1,050 horsepower, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Hog Air Aviation, Inc, doing business as Hog Air
Registered owner
Alaska Aviation Leasing, Inc
Airworthiness certificate
Special, Restricted (Special)
Departed
Private, AR

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
48
Injuries
Serious
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2
Flight hours
13,000 total · 1,150 in this make and model · 300 in the last 90 days

Weather

Conditions
Visual (VMC) · Day

FAA reports on this event · 1

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