CEN23LA311

NTSB accident investigation · Air Tractor AT-802 · Benson, MN · July 14, 2023

Accident · No injuriesClass 4 · LimitedFinal report
Date
July 14, 2023, 16:30 local (21:30 UTC)
Place
Benson, MN · Cultivated field
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N22FKAir Tractor AT-802
Defining event
Maneuvering-low-alt flying: Low altitude operation/event
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Central Region
Parties
FAA
FAA report
20230714008869A
Case key
192646

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 adequately survey a field for obstructions prior to a low-level aerial application pass, which resulted in an impact with a powerline. Contributing to the accident was the degraded visibility due to the smoke in the area.

Findings · 2

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.

Ceiling/visibility/precip: haze/smokeEnvironmental issues › Conditions/weather/phenomena · Effect on personnelAir Tractor AT-802: 1 caseAll aircraft: 21 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 reported that on the afternoon of the aerial application flight, the visibility was degrading due to smoke from nearby wildfires. Upon arrival at the target field, he circled twice to study the powerlines and obstacles, where he observed two distantly spaced power poles, and mistakenly thought they were termination points of a powerline. During the low-level aerial application pass, the airplane subsequently impacted a powerline as he flew between the power poles. The pilot returned to the airport and landed without incident. The airplane sustained substantial damage to the right aileron. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.

Aircraft

Registration
N22FK
Reported as
Air Tractor AT-802
Category
Airplane
Serial number
802-0965
Built
2022
Airframe hours
486.2
Engine
Pratt & Whitney PT6-67AG, 1,350 horsepower, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Fast Ag Air LLC
Airworthiness certificate
Special, Restricted (Special)
Last inspection
100 hour · June 28, 2023 · 88.8 hours before
Departed
KBBB · Benson, MN
Destination
KBBB · Benson, MN
Airport
KBBB · Benson Municipal Airport, runway 14/32, 4,000 × 75 ft, asphalt
Equipment
Electronic multifunction display, Stall warning system, ADS-B

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
38
Injuries
None
Certificate
Commercial
Airplane ratings
Multi-engine land, Single-engine land
Medical
Class 2, Without waivers/limitations
Last flight review
May 2, 2022
Seat
Front
Flight hours
7,000 total · 1,704.9 in this make and model · 6,726.5 as pilot in command · 200 in the last 90 days · 105.9 in the last 30 days · 10 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
320° at 13 knots, gusting 16
Visibility
10 statute miles
Lowest ceiling
None
Temperature
84 °F, dew point 59 °F
Altimeter
29.76 inHg
Observed at
KMVE, 11 nm away
METAR
KMVE 142135Z AUTO 32013G16KT 10SM CLR 29/15 A2976 RMK AO2 LTG DSNT SE

Docket · 2

The files NTSB released with the investigation on October 17, 2023, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.4 MB in all.

FAA reports on this event · 1

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