CEN20LA013

NTSB accident investigation · Air Tractor AT 502 · Lamesa, TX · October 22, 2019

Accident · Serious injuriesClass 3 · LimitedFinal report
Date
October 22, 2019, 12:00 local (17:00 UTC)
Place
Lamesa, TX
Injuries
1 serious, 1 uninjured; on the ground: 1 serious
Damage
Minor damage
Phase of flight
Maneuvering
Aircraft
N9143FAir Tractor AT 502
Defining event
Maneuvering-low-alt flying: Miscellaneous/other
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Central Region
Parties
Federal Aviation Administration, Lubbock FSDO
FAA report
20191022014409A
Case key
100477

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 improper decision to maneuver at a low altitude and in close proximity to a wind turbine undergoing maintenance, which resulted in a collision with a tagline rope being held by a worker on the ground and serious injury to the worker.

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.

Object/animal/substance: wireEnvironmental issues › Physical environment · Contributed to outcomeAir Tractor AT-502: 6 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 was returning from a local aerial application flight when he decided to fly at low altitude past a wind turbine that he believed his friend was working on. The airplane's right wing collided with a tagline rope that was attached to one of the wind turbine blades and being held by a worker on the ground. The worker was thrown about 20 ft and sustained several fractured vertebrae and a broken leg. The airplane's right wing sustained minor damage; however, the pilot was able to make a normal landing at his intended destination without incident.

Factual narrative

On October 22, 2019, about 1200 central daylight time, an Air Tractor AT-502B airplane, N9143F, collided with a tagline rope while maneuvering near a wind turbine located near Lamesa, Texas. The commercial pilot was not injured, but a worker on the ground was seriously injured. The airplane sustained minor damage. The airplane was operated by Plains Aerial Applicators Inc, Olton, Texas, as a Title 14 Code of Federal Regulations (CFR) Part 137 aerial application flight. Day visual meteorological conditions prevailed, and no flight plan was filed for the local flight that departed Lamesa Municipal Airport (LUV), Lamesa, Texas, at 1108. According to the pilot, the takeoff and aerial application portion of the flight was uneventful. The pilot reported that as he flew back toward LUV he sent a text message to a friend who was working on a wind turbine located along US Route 180 and about 10 miles east of LUV. The pilot stated that he intentionally flew at a low altitude past the wind turbine that he believed his friend was working on. The airplane's right wing collided with a tagline rope that was attached to one of the wind turbine blades and being held by a worker on the ground. Following the collision, the pilot was able to make a normal landing at LUV. The airplane sustained minor damage to the right wing leading and trailing edges. The pilot reported that he later found out that his friend had been working on a different wind turbine in the same area. According to the wind turbine company, the technician on the ground was holding onto a 500 ft long tagline rope that was attached to a wind turbine blade about 403 ft above the ground. The technician was standing about 294 ft from the base of the wind turbine when the airplane collided with the tagline rope. The technician was thrown about 20 ft and sustained several fractured vertebrae and a broken leg.

Aircraft

Registration
N9143F
Reported as
Air Tractor AT 502 (B)
Category
Airplane
Serial number
502-0197
Built
1992
Airframe hours
11,086
Engine
Pratt & Whitney PT6A, 680 horsepower, turbo prop
Damage
Minor damage
Flight
Aerial application · Part 137
Operator
Plains Aerial Applicators Inc., doing business as Plains Aerial Applicators Inc.
Registered owner
Wilmington Trust Co Trustee
Airworthiness certificate
Special, Restricted (Special)
Last inspection
100 hour · September 7, 2019 · 80 hours before
Departed
LUV · Lamesa, TX
Destination
LUV · Lamesa, TX
Equipment
Stall warning system

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
43
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
February 14, 2018
Seat
Single
Restraint
5-point
Flight hours
1,680 total · 400 in this make and model · 1,450 as pilot in command · 78 in the last 90 days · 50 in the last 30 days · 7 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
130° at 8 knots
Visibility
10 statute miles
Lowest ceiling
11,000 ft overcast
Temperature
63 °F, dew point 27 °F
Altimeter
30.23 inHg
Observed at
LUV, 9 nm away

Docket · 3

The files NTSB released with the investigation on October 28, 2019, on NTSB’s docket system: statements, records, photos and specialists’ reports. 601 KB 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.