FTW03LA004

NTSB accident investigation · Air Tractor AT-400 · Marmaduke, AR · October 2, 2002

Accident · Minor injuriesLimited investigationFinal report
Date
October 2, 2002, 14:30 local (19:30 UTC)
Place
Marmaduke, AR
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N155HFAir Tractor AT-400
Weather
Visual (VMC) · Day
Status
Completed · report November 25, 2003
Report
Approved by Office Director
Parties
FAA FSDO
FAA report
20021002031339A
Case key
55824

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

On this page

Probable cause

The pilot's failure to maintain aircraft control. A contributing factor was the towering cumulus in all quadrants.

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.

In flight collision with terrain/waterManeuvering - aerial application
Aircraft control - not maintainedPilot in commandCause
Weather condition - thunderstorm,outflowFactor

Analysis

During the aerial application flight, two fields were being sprayed from east to the west with a set of power lines running north and south between the fields. The pilot would fly the airplane over the power lines and then descend to spray the field. During the accident swath descent to spray the east field, the airplane struck the ground. The pilot and local authorities reported that the winds were "strong" from the southwest. The weather observation facility, located approximately 22 nautical miles southwest of the accident site, reported the wind from 250 degrees at 4 knots, visibility 10 statute miles, few clouds at 4,000 feet agl and a broken ceiling at 5,500 feet agl, temperature 31 degrees Celsius, dew point 22 degrees Celsius, an altimeter setting of 30.01 inches of Mercury, and towering cumulus clouds in all quadrants.

Factual narrative

On October 2, 2002, at 1430 central daylight time, an Air Tractor AT-400, agricultural airplane, N155HF, sustained substantial damage following a loss of control during an aerial application flight near Marmaduke, Arkansas. The airplane was owned and operated by Kuntz Aviation of Carthage, Mississippi, under Code of Federal Regulations Part 137. The commercial pilot, sole occupant, received minor injuries. Visual meteorological conditions prevailed for the local flight, and a flight plan was not filed. The flight originated at an unknown time.

The pilot and local authorities reported that the winds were "strong" from the southwest. During the aerial application entry to the cotton field a gust of wind struck the airplane and the airplane struck the ground. Subsequently, the airplane skidded approximately 39 feet, the left main landing gear collapsed, and the airplane skidded an additional 366 feet before coming to rest upright in the cotton field. The empennage separated from the airframe and the left wing was damaged.

On the Pilot/Operator Aircraft Accident Form (NTSB Form 6120.1/2) the operator reported that two fields were being sprayed from east to the west with a set of power lines running north and south between the fields. The pilot would fly the airplane over the power lines and then descend to spray the field. During the accident swath descent to spray the field, the airplane struck the ground.

At 1453, the weather observation facility at Jonesboro, Arkansas, located approximately 22 nautical miles southwest of the accident site, reported the wind from 250 degrees at 4 knots, visibility 10 statute miles, few clouds at 4,000 feet agl and a broken ceiling at 5,500 feet agl, temperature 31 degrees Celsius (88 degrees Fahrenheit), dew point 22 degrees Celsius (71 degrees Fahrenheit), and an altimeter setting of 30.01 inches of Mercury. Towering cumulus clouds were reported in all quadrants.

Aircraft

Registration
N155HF
Reported as
Air Tractor AT-400
Category
Airplane
Serial number
0488
Airframe hours
6,200
Engine
Pratt & Whitney PT6A-20, 550 horsepower, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Glenn Kuntz
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · March 28, 2002 · 400 hours before
Departed
Marmaduke, 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
39
Injuries
Minor
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Center
Flight hours
11,000 total

Weather

Conditions
Visual (VMC) · Day
Wind
250° at 4 knots
Visibility
10 statute miles
Lowest ceiling
5,500 ft broken
Temperature
88 °F, dew point 72 °F
Altimeter
30.01 inHg
Observed at
JBR, 22 nm away

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 N155HF · 1

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