CEN23LA241

NTSB accident investigation · Air Tractor AT-401B · Holyoke, CO · June 15, 2023

Accident · No injuriesClass 4 · LimitedFinal report
Date
June 15, 2023, 08:45 local (14:45 UTC)
Place
Holyoke, CO
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N6106UAir Tractor AT-401B
Defining event
Landing-landing roll: Loss of control on ground
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
20230615008099A
Case key
192378

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 directional control during the landing roll.

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.

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 operator reported that, while landing during a solo instructional flight, the airplane touched down in a three-point attitude and veered left during the roll out. The airplane ground looped to the left and exited the left side of the runway. During the ground loop, the right wing struck the ground. The airplane came to rest about 25 ft from the edge of the runway and sustained substantial damage to the right wing. The operator reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

Aircraft

Registration
N6106U
Reported as
Air Tractor AT-401B
Category
Airplane
Serial number
401B-0976
Built
1995
Airframe hours
8,063.3
Engine
Pratt & Whitney R1340-AN1, 600 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
Steggs Flying Service, Inc, doing business as Steggs Flying Service, Inc
Registered owner
Steggs Flying Service, Inc
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · January 10, 2023
Departed
HEQ · Holyoke, CO
Destination
Same as departure
Airport
HEQ · Holyoke, runway 32, 5,000 × 75 ft, asphalt

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
48
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 3, Without waivers/limitations
Last flight review
March 15, 2022
Seat
Single
Restraint
4-point
Flight hours
385 total · 3 in this make and model · 321 as pilot in command · 39 in the last 90 days · 17 in the last 30 days · 0 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
66 °F, dew point 55 °F
Altimeter
29.84 inHg
Observed at
KHEQ
METAR
KHEQ 151455Z AUTO 00000KT 10SM -RA SCT014 SCT024 SCT032 19/13 A2984 RMK AO2

Docket · 2

The files NTSB released with the investigation on September 28, 2023, on NTSB’s docket system: statements, records, photos and specialists’ reports. 4.7 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.