Individually Owned: 150,657
Corporate Owned: 137,281
N/A Airport
Aircraft Accident/Incident Report
Forrest City, Arkansas 72335
Thursday, February 7, 2013 16:00 CST
NTSB Narrative Summary Released at Completion of Accident
After making an agricultural application, the pilot made a climbing left turn; the airplane then began vibrating and shaking. The pilot was able to return the airplane to level flight, but it rocked left and right, with the left aileron going up and down from stop to stop. The pilot chose to perform an emergency landing in a field next to an airport. A postaccident examination of the airplane revealed that the two aileron push-pull rod bolts were missing. The bolts and associated hardware were not located among the wreckage. The airplane had undergone extensive maintenance about 5 months before the accident. A review of the airplane's maintenance manual revealed that the nuts installed in the airplane control system are self-locking nuts, which can loosen if insufficient torque is applied to them. It is likely that maintenance personnel applied improper torque to the aileron's push-pull rod self-locking nuts, which resulted in the eventual loosening of the nuts and the separation of the left aileron's push-pull rod and hardware.
NTSB Probable Cause Narrative
The in-flight separation of the left aileron's push-pull rod and hardware. Contributing to the accident was the failure of maintenance personnel to apply proper torque to the self-locking nuts.
Event Information
| Type of Event | Accident |
| Event Date | 2/7/2013 |
| Event Day of the Week | Thursday |
| Time of Event | 1600 |
| Event Time Zone | Central Standard Time |
| Event City | Forrest City |
| Event State | ARKANSAS |
| Event Country | -- |
| Zipcode of the event site | 72335 |
| Event Date Year | 2013 |
| Event Date Month | 2 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 345647N |
| Event Location Longitude | 0904628W |
| Event Location Airport | N/A |
| 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 | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1553 Central Standard Time |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | KAWM |
| Elevation of weather observation facility | -- |
| Distance of event from weather observation facility (units?) | -- |
| Time Zone of the weather observation | CST |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 4200 |
| Lowest Non-Ceiling Height | 4200 |
| Sky/Lowest/Cloud Conditions | Thin Broken |
| Sky Condition for Lowest Ceiling | Broken |
| 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) | 12 |
| Wind Direction (degrees magnetic) | 230 |
| Variable Wind Indicator | -- |
| Wind Speed (knots) | 3 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 29.92 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | Minor |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | -- |
| Injury Total Minor | 1 |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 1 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 32116 |
| NTSB Notification Source | ROC |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | Nov 26 2013 10:22AM |
| User who most recently changed record | hatc |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N198LA |
| NTSB Number | CEN13LA168 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | -- |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | AIR TRACTOR INC |
| Aircraft Model | AT-502 |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 502-0198 |
| 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 | 1 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | Sep 1 2013 12:00AM |
| Airframe hours since last inspection | -- |
| Airframe Hours | -- |
| ELT Installed | Unknown |
| ELT Activated | Unknown |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | SOUTH DELTA AVIATION INC |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | WEST HELENA |
| Aircraft Owner State | AR |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 72390-0637 |
| Operator is an individual? | No |
| Operator Name | SOUTH DELTA AVIATION INC |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | WEST HELENA |
| Operator State | AR |
| Operator Country | USA |
| Operator Zip code | 72390-0637 |
| 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) | Other Work Use |
| Second Pilot on Board | No |
| Departure Point Same as Event | Yes |
| Departure Airport Code | -- |
| Departure City | Forrest CIty |
| Departure State | AR |
| Departure Country | USA |
| Departure Time | -- |
| Departure Time Zone | CST |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | -- |
| Destination City | Forrest CIty |
| Destination State | AR |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Nov 25 2013 3:25PM |
| User who most recently changed record | hatc |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | N/A |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |