Aircraft Accident/Incident Report

Springfield, Minnesota 56087
Monday, July 31, 2006 13:45 CDT

NTSB Narrative Summary Released at Completion of Accident

The airplane ground looped following a failure of one of the tail wheel bolts. The pilot reported that he was landing at a private grass airstrip when the accident occurred. He reported that upon landing the tail wheel broke and the airplane ground looped. Inspection of the airplane revealed that it traveled into a bean field during the ground loop and that the bottom bolt on the tail wheel assembly fractured which resulted in a loss of directional control.

NTSB Probable Cause Narrative

The pilot's inability to maintain directional control of the airplane as a result of the partial failure of the tail wheel assembly. A factor associated with the accident was the crop that the airplane contacted.

Event Information

Type of Event Accident
Event Date 7/31/2006
Event Day of the Week Monday
Time of Event 1345
Event Time Zone Central Daylight Time
Event City Springfield
Event State MINNESOTA
Event Country --
Zipcode of the event site 56087
Event Date Year 2006
Event Date Month 7
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 441252N
Event Location Longitude 0945957W
Event Location Airport --
Event Location Nearest Airport ID --
Indicates whether the acc/inc occurred off or on an airport --
Distance from airport in statute miles --
Degrees magnetic from airport --
Airport Elevation --
Weather Briefing Completeness --
Investigator's weather source Pilot
Time of the weather observation
Direction of event from weather observation facility (degrees) --
Weather Observation Facility ID --
Elevation of weather observation facility --
Distance of event from weather observation facility (units?) --
Time Zone of the weather observation --
Lighting Conditions Day
Lowest Ceiling Height --
Lowest Non-Ceiling Height --
Sky/Lowest/Cloud Conditions Clear
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) --
Visibility Runway Visual Value (Statute Miles) --
Visibility (Statute Miles) 10
Air Temperature at event time (in degrees celsius) 33
Dew Point at event time (in degress fahrenheit) --
Wind Direction (degrees magnetic) 180
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 12
Wind Velocity Indicator --
Wind Gust Indicator Gusting
Wind Gust (knots) 20
Altimeter Setting at event time (in. Hg) --
Density Altitude (feet) --
Intensity of Precipitation --
METAR weather report --
Event Highest Injury None
On Ground, Fatal Injuries --
On Ground, Minor Injuries --
On Ground, Serious Injuries --
Injury Total Fatal --
Injury Total Minor --
Injury Total None 1
Injury Total Serious --
Injury Total All --
Investigating Agency --
NTSB Docket Number (internal use) 20606
NTSB Notification Source FAA
NTSB Notification Date Aug 3 2006 12:00AM
NTSB Notification Time --
Fiche Number and/or location -used to find docket information DMS
Date of most recent change to record Nov 29 2006 12:45PM
User who most recently changed record NTSB\johb
Basic weather conditions Visual Meteorological Cond
FAA District Office Minneapolis, MN FSDO

Aircraft Involved

Aircraft #1

Aircraft Registration Number N23720
NTSB Number CHI06CA221
Missing Aircraft Indicator --
Federal Aviation Reg. Part Part 137: Agricultural
Type of Flight Plan filed None
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion --
Aircraft Manufacturer's Full Name Air Tractor
Aircraft Model AT-400
Aircraft Series Identifier --
Aircraft Serial Number 400-0422
Certified Max Gross Weight --
Aircraft Category Airplane
Aircraft Registration Class --
Aircraft is a homebuilt? No
Flight Crew Seats --
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft --
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection --
Date of Last Inspection --
Airframe hours since last inspection --
Airframe Hours --
ELT Installed --
ELT Activated --
ELT Aided Location of Event Site --
ELT Type --
Aircraft Owner Name South Plains Aero, Inc
Aircraft Owner Street Address HC 5 Box 57
Aircraft Owner City Brownfield
Aircraft Owner State TX
Aircraft Owner Country USA
Aircraft Owner Zipcode 79316
Operator is an individual? No
Operator Name Dlux Spray Service
Operator Same as Owner? No
Operator Is Doing Business As --
Operator Address Same as Owner? No
Operator Street Address --
Operator City Lamore
Operator State ND
Operator Country USA
Operator Zip code --
Operator Code --
Owner has at least one certificate --
Other Operator of large aircraft? --
Certified for Part 133 or 137 Operation Agriculture
Operator Certificate Number --
Indicates whether an air carrier operation was scheduled or not --
Indicates Domestic or International Flight --
Operator carrying Pax/Cargo/Mail --
Type of Flying (Per_Bus / Primary) Aerial Application
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code 27D
Departure City Canby
Departure State MN
Departure Country USA
Departure Time 1230
Departure Time Zone CDT
Destination Same as Local Flt --
Destination Airport Code PVT
Destination City Springfield
Destination State MN
Destination Country USA
Specific Phase of Flight --
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Aug 31 2006 5:47PM
User who most recently changed record DINC
Since inspection or accident --
Event Location Runway Number and Location --
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --