Rafter J Airport
Aircraft Accident/Incident Report

Burleson, Texas 76028
Saturday, January 3, 2004 12:40 CST

NTSB Narrative Summary Released at Completion of Accident

While landing at a private airstrip, the right main gear separated from the aircraft. Shortly after touchdown, the right gear strut dug into the grass for approximately 75 feet before the aircraft nosed over and came to rest inverted. Inspection of the amateur-built aircraft revealed that there was an old crack on the flange where it was welded to the axle nut. A new fracture had propagated from the ends of this crack around the lower axle shaft bolt, causing the other 3 remaining bolts to fracture and separate. Examination also revealed that the axle shaft had been cut off next to the backing plate flange and an axle shaft similar to what is used on a Cessna spring gear was bolted to the flange with four quarter-inch bolts. The FAA Inspector found the separated wheel with a piece of the flange still attached to it by one of the bolts. The flange was able to swivel around the bolt, suggesting that the bolt (and the 3 other bolts) was improperly torqued.

NTSB Probable Cause Narrative

The separation of the right main gear wheel, during landing, due to the improper maintenance by unknown maintenance personnel on the right main landing gear assembly.

Event Information

Type of Event Accident
Event Date 1/3/2004
Event Day of the Week Saturday
Time of Event 1240
Event Time Zone Central Standard Time
Event City Burleson
Event State TEXAS
Event Country --
Zipcode of the event site 76028
Event Date Year 2004
Event Date Month 1
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 323154N
Event Location Longitude 0971829W
Event Location Airport Rafter J Airport
Event Location Nearest Airport ID 3TX9
Indicates whether the acc/inc occurred off or on an airport On Airport
Distance from airport in statute miles --
Degrees magnetic from airport --
Airport Elevation 710
Weather Briefing Completeness Full
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 12000
Lowest Non-Ceiling Height --
Sky/Lowest/Cloud Conditions Clear
Sky Condition for Lowest Ceiling Overcast
Visibility Runway Visual Range (Feet) --
Visibility Runway Visual Value (Statute Miles) --
Visibility (Statute Miles) 10
Air Temperature at event time (in degrees celsius) 18
Dew Point at event time (in degress fahrenheit) 8
Wind Direction (degrees magnetic) 170
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 20
Wind Velocity Indicator --
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 30.1
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
NTSB Docket Number (internal use) 15171
NTSB Notification Source FAA Operations Center
NTSB Notification Date Jan 8 2004 12:00AM
NTSB Notification Time 634
Fiche Number and/or location -used to find docket information DMS
Date of most recent change to record Mar 30 2004 8:14AM
User who most recently changed record NTSB\MONR
Basic weather conditions Visual Meteorological Cond
FAA District Office Fort Worth Flight Standards District Office

Aircraft Involved

Aircraft #1

Aircraft Registration Number N9AQ
NTSB Number FTW04LA056
Missing Aircraft Indicator --
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? No
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name Pitts
Aircraft Model S-1S
Aircraft Series Identifier --
Aircraft Serial Number 568-H
Certified Max Gross Weight 1150
Aircraft Category Airplane
Aircraft Registration Class U.S. Registered/U.S. Soil
Aircraft is a homebuilt? Yes
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 Jun 22 2003 12:00AM
Airframe hours since last inspection 26
Airframe Hours 1486.8
ELT Installed No
ELT Activated No
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name Joe A. Scott
Aircraft Owner Street Address 124 Stonewick Drive
Aircraft Owner City Benbrook
Aircraft Owner State TX
Aircraft Owner Country USA
Aircraft Owner Zipcode 76126
Operator is an individual? No
Operator Name --
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? No
Operator Street Address 124 Stonewick Drive
Operator City Benbrook
Operator State TX
Operator Country USA
Operator Zip code 76126
Operator Code --
Owner has at least one certificate None
Other Operator of large aircraft? --
Certified for Part 133 or 137 Operation --
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) Personal
Second Pilot on Board --
Departure Point Same as Event No
Departure Airport Code FWS
Departure City Burleson
Departure State TX
Departure Country USA
Departure Time 1240
Departure Time Zone CST
Destination Same as Local Flt --
Destination Airport Code 3TX9
Destination City Burleson
Destination State TX
Destination Country USA
Specific Phase of Flight Landing
Report sent to ICAO? No
Evacuation occurred Yes
Date of most recent change to record Jan 31 2004 1:24PM
User who most recently changed record CASH
Since inspection or accident Time of Accident
Event Location Runway Number and Location 15
Runway Length 2800
Runway Width 50
Sight Seeing flight No
Air Medical Flight No
Medical Flight --