Lawrence County Airport
Aircraft Accident/Incident Report

Lawrenceburg, Tennessee 38464
Saturday, April 22, 2000 15:00 CDT

NTSB Narrative Summary Released at Completion of Accident

The pilot stated that, while on an aerial application run, he heard a loud pop and observed black smoke coming from the engine exhaust. The pilot selected an area for a forced landing. While maneuvering for the landing, the airplane collided with trees. Examination of the engine disclosed that, the number 3 cylinder's exhaust valve was stuck in the open position

NTSB Probable Cause Narrative

The loss of engine power due to a stuck exhaust valve that resulted in the collision with a tree while maneuvering for the forced landing.

Event Information

Type of Event Accident
Event Date 4/22/2000
Event Day of the Week Saturday
Time of Event 1500
Event Time Zone Central Daylight Time
Event City LAWRENCEBURG
Event State TENNESSEE
Event Country --
Zipcode of the event site 38464
Event Date Year 2000
Event Date Month 4
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude --
Event Location Longitude --
Event Location Airport LAWRENCE COUNTY AIRPORT
Event Location Nearest Airport ID 2M2
Indicates whether the acc/inc occurred off or on an airport Off Airport/Airstrip
Distance from airport in statute miles 1
Degrees magnetic from airport --
Airport Elevation 936
Weather Briefing Completeness Unknown
Investigator's weather source Weather Observation Facility
Time of the weather observation 1500 Central Daylight Time
Direction of event from weather observation facility (degrees) 200
Weather Observation Facility ID BNA
Elevation of weather observation facility 599
Distance of event from weather observation facility (units?) 75
Time Zone of the weather observation CDT
Lighting Conditions Day
Lowest Ceiling Height 25000
Lowest Non-Ceiling Height 0
Sky/Lowest/Cloud Conditions Clear
Sky Condition for Lowest Ceiling Broken
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) 19
Dew Point at event time (in degress fahrenheit) 4
Wind Direction (degrees magnetic) 310
Variable Wind Indicator Unknown
Wind Speed (knots) 8
Wind Velocity Indicator Unknown
Wind Gust Indicator Not Gusting
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) 29
Density Altitude (feet) 1545
Intensity of Precipitation Unknown
METAR weather report --
Event Highest Injury None
On Ground, Fatal Injuries 0
On Ground, Minor Injuries 0
On Ground, Serious Injuries 0
Injury Total Fatal --
Injury Total Minor --
Injury Total None 1
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 221
NTSB Notification Source FAA
NTSB Notification Date Apr 22 2000 12:00AM
NTSB Notification Time 1724
Fiche Number and/or location -used to find docket information IMAGE
Date of most recent change to record May 13 2003 1:46PM
User who most recently changed record NTSB\ZUZL
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N6096P
NTSB Number ATL00LA046
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 137: Agricultural
Type of Flight Plan filed Unknown
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name Air Tractor
Aircraft Model AT-401-B
Aircraft Series Identifier AT-401-B
Aircraft Serial Number 0999
Certified Max Gross Weight 7000
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 Unknown
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 THORNTON AERIAL APPLICATION
Aircraft Owner Street Address 13042 HWY 72
Aircraft Owner City ROGERSVILLE
Aircraft Owner State AL
Aircraft Owner Country
Aircraft Owner Zipcode 35652
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
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 Yes
Departure Airport Code
Departure City
Departure State
Departure Country
Departure Time 1450
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 Mar 4 2001 7:06AM
User who most recently changed record dbo
Since inspection or accident --
Event Location Runway Number and Location 35
Runway Length 4800
Runway Width 100
Sight Seeing flight No
Air Medical Flight No
Medical Flight --