CEN20CA311

NTSB accident investigation · Air Tractor AT 401 · Burlington, CO · July 27, 2020

Accident · Minor injuriesClass 4 · Data collectionFinal report
Date
July 27, 2020, 11:08 local (17:08 UTC)
Place
Burlington, CO
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N9190QAir Tractor AT 401
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 FSDO
FAA report
20200727008399A
Case key
101682

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 guy-wires during low-altitude agricultural operations.

Findings · 3

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.

Performance/control parameters: altitudeAircraft › Aircraft oper/perf/capability · Attain/maintain not possibleAir Tractor AT-401: 3 casesAll aircraft: 1,310 cases
Object/animal/substance: wireEnvironmental issues › Physical environment · Awareness of conditionAir Tractor AT-401: 2 casesAll aircraft: 588 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 flew the agricultural airplane to the designated spray area. He made 3-4 passes on a corn field and surveyed the area for guy-wires (a tower was adjacent to the field). He flew multiple passes around the tower to look for guy-wires but he was not able to get an exact location on the tower’s guy-wires and started spraying the field from south to north, and then west to east. After spraying about 4 passes in the middle of the field and 3 passes on the west end of the field the airplane struck a guy-wire with the right wing. After the airplane hit the wire, the pilot had trouble maintaining altitude. The airplane collided through a single set of power lines and struck the ground, resulting in substantial damage to the wings, fuselage, and empennage.

Aircraft

Registration
N9190Q
Reported as
Air Tractor AT 401 (Undesignat)
Category
Airplane
Serial number
401-0925
Built
1989
Airframe hours
4,014
Engine
P&W 1340, 650 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Air Care Inc
Registered owner
Miller Tom O
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · January 10, 2020
Departed
ITR · Burlington, CO
Flight plan
Company VFR
Airport
Burlington

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
28
Injuries
Minor
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Without waivers/limitations
Last flight review
March 7, 2019
Seat
Center
Restraint
5-point
Flight hours
1,880 total · 636 in this make and model · 250 in the last 90 days · 75 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
70° at 14 knots
Visibility
10 statute miles
Lowest ceiling
1,900 ft broken
Temperature
72 °F, dew point 66 °F
Altimeter
28.00 inHg
Observed at
ITR, 14 nm away

Docket · 2

The files NTSB released with the investigation on July 29, 2021, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.0 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.

Other investigations on N9190Q · 1

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