CEN22FA347

NTSB accident investigation · Air Tractor AT502 · Ute, IA · July 30, 2022

Accident · FatalClass 3 · FieldFinal report
Date
July 30, 2022, 13:00 local (18:00 UTC)
Place
Ute, IA
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N501MWAir Tractor AT502
Defining event
Maneuvering-low-alt flying: Low altitude operation/event
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Central Region
Parties
FAA FSDO, Air Tractor
FAA report
20220730007609A
Case key
105624

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 inflight collision with a power line during aerial application.

Findings · 4

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 · Response/compensationAir Tractor AT-502A: 1 caseAll aircraft: 588 casesProbable cause
Performance/control parameters: altitudeAircraft › Aircraft oper/perf/capability · Not attained/maintainedAir Tractor AT-502A: 1 caseAll 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

While conducting an aerial application flight, the airplane’s left wing contacted a power line on the western edge of the field. The airplane subsequently impacted the ground nose-low and a postimpact fire ensued. Examination of the wreckage did not reveal any anomalies which would have precluded normal operation of the airplane.

Factual narrative

On July 30, 2022, about 1300 central daylight time, an Air Tractor AT-502A airplane, N501MW, was destroyed when was involved in an accident near Ute, Iowa. The pilot was fatally injured. The airplane was operated under the provisions of Title 14 Code of Federal Regulations Part 137 as an aerial application flight. The airplane was applying chemicals to a field. The airplane struck a wire on the western edge of the field and subsequently impacted terrain. A postcrash fire ensued. There are no known witnesses to the accident. No ADS-B data was located for the accident flight. Toxicology was conducted on samples from the pilot. Testing was negative for carbon monoxide and ethanol. Loratadine and desloratadine were detected which are a nonprescription sedating antihistamine used to treat allergies. The airplane wreckage came to rest on a paved road, upright, facing a magnetic heading of 130°. The field that the pilot was spraying was to the east of the accident site and was bordered on three sides by power lines. Damaged power lines were located on the western edge of the field. Portions of the left wing were scattered around the powerlines and to the north of the wreckage. The airplane engine was driven near vertical into the edge of a paved road about 7 yards west of the damaged powerlines. A post-impact fire consumed a majority of the left wing, fuselage, and empennage. Figure 1 Accident Site (Photo from Monona County Sheriff's Office) Examination of the airplane did not reveal any preimpact anomalies which would have precluded normal operation.

Aircraft

Registration
N501MW
Reported as
Air Tractor AT502 (A)
Category
Airplane
Serial number
502A-3232
Built
2020
Airframe hours
748.5
Engine
P&W Canada PT6A-140AG, 867 horsepower, turbo prop
Damage
Destroyed
Fire
On-Ground
Flight
Aerial application · Part 137
Operator
Midwest Custom Ag Aviation, doing business as Midwest Custom Ag Aviation
Registered owner
Bank Of Utah Trustee
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · March 11, 2022
Departed
KMEY · Mapleton, IA

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
45
Injuries
Fatal
Certificate
Commercial
Airplane ratings
Single-engine sea, Single-engine land
Medical
Class 2, Without waivers/limitations
Last flight review
November 18, 2021
Seat
Single
Restraint
4-point
Toxicology
Performed
Flight hours
5,900 total · 1,370 in this make and model · 200 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
210° at 8 knots, gusting 15
Visibility
9 statute miles
Lowest ceiling
None
Temperature
81 °F, dew point 59 °F
Altimeter
30.16 inHg
Observed at
KDNS, 15 nm away
METAR
KDNS 301755Z AUTO 21008G15KT 180V240 9SM CLR 27/15 A3016 RMK AO2

Docket · 6

The files NTSB released with the investigation on February 28, 2024, on NTSB’s docket system: statements, records, photos and specialists’ reports. 10.1 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.