CEN13LA425

NTSB accident investigation · Air Tractor AT-400 · Steward, IL · July 19, 2013

Accident · No injuriesLimited investigationFinal report
Date
July 19, 2013, 08:07 local (13:07 UTC)
Place
Steward, IL
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N155HFAir Tractor AT-400
Defining event
Maneuvering-low-alt flying: Low altitude operation/event
Weather
Visual (VMC) · Day
Status
Completed · report January 30, 2014
Report
Approved by Office Director
NTSB office
Central Region
Parties
FAA DuPage FDSO
FAA report
20130719012309A
Case key
87528

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 failure to maintain clearance from the guy wires during an aerial application maneuver. Contributing to the accident was the pilot's failure to identify potential obstructions in the area before beginning low-altitude maneuvers.

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.

Action: incorrect action performancePersonnel issues › Action/decision · PilotAir Tractor AT-400: 1 caseAll aircraft: 1,386 casesProbable cause
Planning/preparationPersonnel issues › Task performance · PilotAir Tractor AT-400: 1 caseAll aircraft: 113 casesProbable cause
Object/animal/substance: tower/antenna (incl guy wires)Environmental issues › Physical environment · Contributed to outcomeAir Tractor AT-400: 3 casesAll aircraft: 55 cases

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 reported that he circled the field to check for obstacles before beginning to apply the agricultural product, but did not see any obstructions. He made the first aerial application pass without incident; however, during the second pass, the airplane hit guy wires "head on." The guy wires extended farther into the field than the pilot was accustomed to and can be difficult to see. The airplane impacted the cornfield, and the two adjacent towers were toppled by the impact with the guy wires. The pilot reported that there was no preaccident malfunction or system failure of the airplane that would have precluded normal operation.

Factual narrative

On July 19, 2013, about 0807 central daylight time, an Air Tractor AT-400, N155HF, sustained substantial damage when it impacted a guy wire and subsequently impacted the terrain near Steward, Illinois. The commercial pilot, the sole occupant, was seriously injured. The airplane was registered to Woodley Aerial Leasing LLC and operated by the pilot under the provisions of the 14 Code of Federal Regulations Part 137 as an aerial application flight. Visual meteorological conditions prevailed at the time of the accident, and no flight plan was filed. The flight originated from a local airstrip about 0740.The pilot reported that he circled the field to check for obstacles prior to beginning the application pass, but he did not see the guy wires reaching further into the field than he was normally accustomed. He made the first pass without incident, and then during the second pass the airplane hit the guy wires "head on." The airplane impacted the cornfield, and two towers were toppled by the impact with the guy wires. The pilot reported that there was no malfunction or system failure of the airplane before the accident.

Aircraft

Registration
N155HF
Reported as
Air Tractor AT-400
Category
Airplane
Serial number
AT400-0488
Airframe hours
5,826
Engine
Pratt & Whitney PT-6A-27, 680 horsepower, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Timothy Malsberg
Registered owner
Woodley Aerial Leasing LLC
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · July 15, 2013
Departed
C73 · Dixon, IL
Destination
C73 · Dixon, IL
Airport
C73 · Dixon Municipal

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
60
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, With waivers/limitations
Last flight review
February 8, 2013
Seat
Center
Flight hours
8,651 total · 1,440 in this make and model · 8,651 as pilot in command · 120 in the last 90 days · 15 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Visibility
10 statute miles
Temperature
75 °F
Observed at
14 nm away

Docket · 7

The files NTSB released with the investigation on December 5, 2013, on NTSB’s docket system: statements, records, photos and specialists’ reports. 20.0 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 N155HF · 1

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