CHI99LA193

NTSB accident investigation · Air Tractor AT-301 · Veblen, SD · June 24, 1999

Accident · Minor injuriesLimited investigationFinal report
Date
June 24, 1999, 07:30 local (12:30 UTC)
Place
Veblen, SD
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N3159MAir Tractor AT-301
Weather
Visual (VMC) · Day
Status
Completed · report November 22, 2000
Report
Approved by Office Director
FAA report
19990624007539A
Case key
46623

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

was the pilot not maintaining clearance from terrain. A factor was the pilot not performing a load jettison.

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 control - in flightManeuvering - aerial application
Altitude/clearance - not maintainedPilot in commandCause
Load jettison - not performedPilot in commandFactor
On ground/water encounter with terrain/waterDescent - uncontrolled

Analysis

The pilot said on his fourth spray pass, he encountered air that did not seem '...to have much lift to it' and he was adding power to climb the accident airplane above trees. He said he had applied full power as he got closer to the trees and the airplane started settling downward once over the tree line. He stated the airplane settled and contacted the ground. The engine was torn off the fuselage, along with the landing gear and tail wheel. The pilot stated the fuselage came to rest on a southeasterly direction. The pilot stated 'dumping the load' was his recommendation on how this accident could have been prevented.

Factual narrative

On June 24, 1999, at 0730 central daylight time, an Air Tractor AT-301, N3159M, piloted by a commercial pilot, received substantial damage on impact with terrain near Veblen, South Dakota. Visual meteorological conditions prevailed at the time of the accident. The 14 CFR Part 137 aerial application flight was not on a flight plan. The pilot sustained minor injuries. The local flight originated from Britton Municipal Airport, Britton, South Dakota at approximately 0700.

The pilot stated that he loaded the Air Tractor with 240-gallons of water and chemicals and that the fuel tanks had 70 to 80 gallons of fuel. He stated that winds were out of the southwest at 6 to 10 mph. He said he was spraying in some local hills. On his fourth pass, he said that he encountered air that did not seem "...to have much lift to it". He said that he started adding power to climb the airplane above trees. He said that he had applied full power as he got closer to the trees and the airplane started settling downward once over the tree line. He stated that the airplane settled and contacted the ground. The engine was torn off the fuselage, along with the landing gear and tail wheel. The pilot stated that the fuselage came to rest on a southeasterly direction. The pilot stated that "dumping the load" was his recommendation on how this accident could have been prevented.

Aircraft

Registration
N3159M
Reported as
Air Tractor AT-301
Category
Airplane
Serial number
301-0468
Airframe hours
3,187
Engine
P&W R-1340 AN-1, 600 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Dakota Ag Service Inc.
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · April 2, 1999 · 106 hours before
Departed
BTN · Britton, SD

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
59
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Center
Flight hours
7,345 total · 2,450 in this make and model · 7,021 as pilot in command · 106 in the last 90 days · 50 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
230° at 3 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
63 °F, dew point 57 °F
Altimeter
29.00 inHg
Observed at
ABR, 106 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.