Individually Owned: 150,657
Corporate Owned: 137,281
Hamilton Aircraft, Inc. Airport
Aircraft Accident/Incident Report
Seminole, Texas 79360
Monday, August 30, 1999 18:45 CDT
NTSB Narrative Summary Released at Completion of Accident
During the landing roll, the agricultural airplane departed the right side of the runway, rolled into soft terrain, and subsequently nosed over to the inverted position. The pilot reported that during the landing roll, his seat became dislodged from the seat track. He further reported that since his left leg is shorter than his right leg, when the seat slid all the way back, it caused his left foot to lose contact with the rudder pedal. Examination of the seat by an FAA inspector revealed that the forward left seat roller housing assembly had spread open to near the width of the seat rail, allowing the seat to dislodge from the locked position. According to the inspector, the airplane's maintenance records indicated that AD 87-20-03 R2 (to assure proper engagement of the seat locking mechanism and to preclude inadvertent seat slippage) had been complied with at the last annual inspection. However, the inspector stated that the AD had not been properly accomplished, since his examination of the seat revealed that it did not meet the locking pin engagement requirements of the AD. Time since the last annual inspection was 249.4 hours.
NTSB Probable Cause Narrative
The pilot seat disengaging from the seat track resulting from inadequate AD compliance during the last annual inspection. A factor was the soft terrain.
Event Information
| Type of Event | Accident |
| Event Date | 8/30/1999 |
| Event Day of the Week | Monday |
| Time of Event | 1845 |
| Event Time Zone | Central Daylight Time |
| Event City | SEMINOLE |
| Event State | TEXAS |
| Event Country | -- |
| Zipcode of the event site | 79360 |
| Event Date Year | 1999 |
| Event Date Month | 8 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | HAMILTON AIRCRAFT, INC. |
| Event Location Nearest Airport ID | 5TAO |
| 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 | 3300 |
| Weather Briefing Completeness | Not pertinent |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1850 Central Daylight Time |
| Direction of event from weather observation facility (degrees) | 255 |
| Weather Observation Facility ID | HOB |
| Elevation of weather observation facility | 3659 |
| Distance of event from weather observation facility (units?) | 31 |
| Time Zone of the weather observation | CDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 0 |
| Lowest Non-Ceiling Height | 10000 |
| Sky/Lowest/Cloud Conditions | Scattered |
| Sky Condition for Lowest Ceiling | None |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 20 |
| Air Temperature at event time (in degrees celsius) | 34 |
| Dew Point at event time (in degress fahrenheit) | 8 |
| Wind Direction (degrees magnetic) | 120 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 12 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 30 |
| 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) | 1073 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Aug 31 1999 12:00AM |
| NTSB Notification Time | 258 |
| Fiche Number and/or location -used to find docket information | IMAGE |
| Date of most recent change to record | Dec 12 2000 11:50AM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N731JY |
| NTSB Number | FTW99LA244 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 137: Agricultural |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | -- |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Cessna |
| Aircraft Model | A188B |
| Aircraft Series Identifier | A188B |
| Aircraft Serial Number | 18802941T |
| Certified Max Gross Weight | 3300 |
| 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 | Apr 16 1999 12:00AM |
| Airframe hours since last inspection | 249 |
| Airframe Hours | 5288 |
| ELT Installed | Unknown |
| ELT Activated | Unknown |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | JOHN WESLEY ADDISON |
| Aircraft Owner Street Address | 910 SW 9TH STREET |
| Aircraft Owner City | SEMINOLE |
| Aircraft Owner State | TX |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 79360 |
| Operator is an individual? | -- |
| Operator Name | GRAHAM ADDISON |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | P. O. BOX 187 |
| Operator City | SEMINOLE |
| Operator State | TX |
| Operator Country | |
| Operator Zip code | 79360 |
| Operator Code | ADGG |
| 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 | 4TX6 |
| Departure City | |
| Departure State | TX |
| Departure Country | |
| Departure Time | 1830 |
| Departure Time Zone | CDT |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | 5TAO |
| Destination City | |
| Destination State | |
| Destination Country | |
| Specific Phase of Flight | Landing |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 2 2001 10:35AM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 9 |
| Runway Length | 5280 |
| Runway Width | 60 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |