GAA16CA224

NTSB accident investigation · Air Tractor AT 502 · Oberlin, KS · May 8, 2016

Accident · No injuriesData collectionFinal report
Date
May 8, 2016, 17:00 local (22:00 UTC)
Place
Oberlin, KS
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N6181QAir Tractor AT 502
Defining event
Landing: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report July 14, 2016
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20160508005309A
Case key
93134

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, which resulted in runway excursion, and a ground loop.

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.

Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotAir Tractor AT-502B: 22 casesAll aircraft: 9,295 casesProbable cause
Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedAir Tractor AT-502B: 8 casesAll aircraft: 3,958 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 of the tailwheel equipped airplane reported that during the landing roll, as the airplane slowed down, the tailwheel lifted off the ground. He further reported that the airplane veered to the right despite left rudder and brake application, exited the runway, and ground looped. According to the pilot there were no preimpact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation. The airplane sustained substantial damage to the fuselage and empennage.

Factual narrative

The pilot of the tailwheel equipped airplane reported that during the landing roll, as the airplane slowed down, the tailwheel lifted off the ground. He further reported that the airplane veered to the right despite left rudder and brake application, exited the runway, and ground looped. According to the pilot there were no preimpact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation. The airplane sustained substantial damage to the fuselage and empennage.

Aircraft

Registration
N6181Q
Reported as
Air Tractor AT 502 (B)
Category
Airplane
Serial number
502B-0395
Built
1996
Airframe hours
2,882
Engine
Pratt & Whitney 34AG-PT6A, 750 horsepower, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Kelly Sykora
Registered owner
Pioneer Agviation Inc
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · March 8, 2016
Departed
OIN · Oberlin, KS
Destination
OIN · Oberlin, KS
Flight plan
VFR
Airport
OIN · Oberlin Muni, runway 35, 3,501 × 60 ft, asphalt
Equipment
Handheld GPS

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
26
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Without waivers/limitations
Seat
Single
Restraint
4-point
Flight hours
1,058 total · 410 in this make and model · 836 as pilot in command · 31.2 in the last 90 days · 30 in the last 30 days · 8 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
73 °F, dew point 50 °F
Altimeter
29.59 inHg
Observed at
KMCK, 22 nm away

Docket · 2

The files NTSB released with the investigation on July 12, 2016, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.2 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 N6181Q · 1

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