Aircraft Accident/Incident Report

Throckmorton, Texas 76483
Friday, October 18, 1996 18:30 CDT

NTSB Narrative Summary Released at Completion of Accident

The pilot reported that he made an aerial application swath run in a north to south direction. During pull-up from the swath run, the airplane's main landing gear (which were not equipped with wire cutters) caught on an east to west oriented unmarked electrical transmission wire. The pilot further stated that 'the east end of the wire became entangled in the airplane's rudder horn, forcing the airplane into an uncontrolled left turn.' The engine power and the momentum of the airplane were sufficient to 'snap three telephone poles.' Subsequently, the airplane impacted the ground and came to rest inverted. A postimpact fire destroyed the airplane.

NTSB Probable Cause Narrative

failure of the pilot to maintain clearance of a transmission wire during pullup from a swath run. The proximity of the transmission wire was a related factor. The installation of wire cutter equipment on the landing gear might have prevented or reduced the level of damage or injury.

Event Information

Type of Event Accident
Event Date 10/18/1996
Event Day of the Week Friday
Time of Event 1830
Event Time Zone Central Daylight Time
Event City THROCKMORTON
Event State TEXAS
Event Country --
Zipcode of the event site 76483
Event Date Year 1996
Event Date Month 10
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude
Event Location Longitude
Event Location Airport
Event Location Nearest Airport ID
Indicates whether the acc/inc occurred off or on an airport Off Airport/Airstrip
Distance from airport in statute miles --
Degrees magnetic from airport --
Airport Elevation --
Weather Briefing Completeness Unknown
Investigator's weather source Pilot
Time of the weather observation 0
Direction of event from weather observation facility (degrees) 0
Weather Observation Facility ID
Elevation of weather observation facility 0
Distance of event from weather observation facility (units?) 0
Time Zone of the weather observation
Lighting Conditions Day
Lowest Ceiling Height 0
Lowest Non-Ceiling Height 0
Sky/Lowest/Cloud Conditions Clear
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 10
Air Temperature at event time (in degrees celsius) 24
Dew Point at event time (in degress fahrenheit) --
Wind Direction (degrees magnetic) 360
Variable Wind Indicator Unknown
Wind Speed (knots) 5
Wind Velocity Indicator Unknown
Wind Gust Indicator Not Gusting
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) --
Density Altitude (feet) --
Intensity of Precipitation Unknown
METAR weather report --
Event Highest Injury Serious
On Ground, Fatal Injuries 0
On Ground, Minor Injuries 0
On Ground, Serious Injuries 0
Injury Total Fatal --
Injury Total Minor --
Injury Total None --
Injury Total Serious 1
Injury Total All 1
Investigating Agency NTSB
NTSB Docket Number (internal use) 1587
NTSB Notification Source --
NTSB Notification Date Oct 19 1917 12:00AM
NTSB Notification Time 1712
Fiche Number and/or location -used to find docket information IMAGE
Date of most recent change to record Dec 8 2000 10:24AM
User who most recently changed record dbo
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N4549Z
NTSB Number FTW97LA019
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 137: Agricultural
Type of Flight Plan filed None
Flight plan Was Activated? --
Damage Destroyed
Aircraft Fire Ground
Aircraft Explosion None
Aircraft Manufacturer's Full Name Air Tractor
Aircraft Model AT-502
Aircraft Series Identifier AT-502
Aircraft Serial Number 502-0129
Certified Max Gross Weight 1500
Aircraft Category Airplane
Aircraft Registration Class U.S. Registered/U.S. Soil
Aircraft is a homebuilt? No
Flight Crew Seats --
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft 1
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Annual
Date of Last Inspection --
Airframe hours since last inspection --
Airframe Hours --
ELT Installed No
ELT Activated Unknown
ELT Aided Location of Event Site Unknown
ELT Type --
Aircraft Owner Name NEW NUECES AG SERVICE, INC.
Aircraft Owner Street Address P.O. BOX 1366
Aircraft Owner City ROBSTOWN
Aircraft Owner State TX
Aircraft Owner Country
Aircraft Owner Zipcode 78380
Operator is an individual? --
Operator Name
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address
Operator City
Operator State
Operator Country
Operator Zip code
Operator Code YNUG
Owner has at least one certificate Yes - certificate holder
Other Operator of large aircraft? No
Certified for Part 133 or 137 Operation Agriculture
Operator Certificate Number --
Indicates whether an air carrier operation was scheduled or not Unknown
Indicates Domestic or International Flight Unknown
Operator carrying Pax/Cargo/Mail Unknown
Type of Flying (Per_Bus / Primary) Aerial Application
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code ONY
Departure City OLNEY
Departure State TX
Departure Country
Departure Time 1731
Departure Time Zone CDT
Destination Same as Local Flt dest & departure same, accident can occur anywhere
Destination Airport Code
Destination City
Destination State
Destination Country
Specific Phase of Flight Maneuvering
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Jan 2 2001 10:34AM
User who most recently changed record dbo
Since inspection or accident --
Event Location Runway Number and Location 0
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --