Individually Owned: 150,657
Corporate Owned: 137,281
Timber Lake Airport
Aircraft Accident/Incident Report
Timber Lake, South Dakota 57656
Tuesady, July 6, 1999 12:40 MDT
NTSB Narrative Summary Released at Completion of Accident
The aerial spraying aircraft was loaded with 270 gallons of solution and was attempting to takeoff from the Timber Lake Airport on Runway 17 (2,400 feet by 120 feet, dry/turf). The density altitude at the time was 3,680 feet and a weather reporting station, located 30 miles and 075 degrees magnetic from the accident site, was reporting calm winds. According to the South Dakota Airport Directory, the Timber Lake Airport has a second turf runway (Runway 12/30) that is 3,300 feet long and 150 feet wide. The aircraft lifted off and then settled back onto the runway. The aircraft lifted off again and then struck a fence. The pilot stated that he decided to continue and started to dump the load of chemicals that he was carrying. The aircraft then struck another fence and posts and came to rest in a road east of the airport. The pilot stated that he did not believe that there were any problems with the aircraft. In his statement, the pilot wrote, '... what I wish I would have done is taken off on the other runway or not have filled her quite as full.' A post accident examination revealed no mechanical anomalies.
NTSB Probable Cause Narrative
the pilots selection of the shorter runway and his failure to abort the takeoff. Factors to the accident were the high density altitude, the fence and the fence posts.
Event Information
| Type of Event | Accident |
| Event Date | 7/6/1999 |
| Event Day of the Week | Tuesday |
| Time of Event | 1240 |
| Event Time Zone | Mountain Daylight Time |
| Event City | TIMBER LAKE |
| Event State | SOUTH DAKOTA |
| Event Country | -- |
| Zipcode of the event site | 57656 |
| Event Date Year | 1999 |
| Event Date Month | 7 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | TIMBER LAKE AIRPORT |
| Event Location Nearest Airport ID | D58 |
| 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 | 2193 |
| Weather Briefing Completeness | Unknown |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1255 Mountain Daylight Time |
| Direction of event from weather observation facility (degrees) | 75 |
| Weather Observation Facility ID | MBG |
| Elevation of weather observation facility | 1715 |
| Distance of event from weather observation facility (units?) | 30 |
| Time Zone of the weather observation | MDT |
| 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) | 26 |
| Dew Point at event time (in degress fahrenheit) | 9 |
| Wind Direction (degrees magnetic) | 0 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 0 |
| Wind Velocity Indicator | Calm |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 30 |
| Density Altitude (feet) | 3680 |
| 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) | 254 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Jul 6 1999 12:00AM |
| NTSB Notification Time | 1536 |
| Fiche Number and/or location -used to find docket information | IMAGE |
| Date of most recent change to record | Dec 12 2000 11:43AM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N350WR |
| NTSB Number | CHI99LA214 |
| 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 | Weatherly |
| Aircraft Model | 620B |
| Aircraft Series Identifier | 620B |
| Aircraft Serial Number | 1612 |
| Certified Max Gross Weight | 4000 |
| 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 | Feb 1 1999 12:00AM |
| Airframe hours since last inspection | 209 |
| Airframe Hours | 1340 |
| ELT Installed | No |
| ELT Activated | Unknown |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | WEST RIVER AERIAL, INC. |
| Aircraft Owner Street Address | P.O. BOX 71 |
| Aircraft Owner City | TIMBER LAKE |
| Aircraft Owner State | SD |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 57656 |
| 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 | D58 |
| Departure City | |
| Departure State | |
| Departure Country | |
| Departure Time | 1240 |
| Departure Time Zone | MDT |
| 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 | -- |
| 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 | 17 |
| Runway Length | 2400 |
| Runway Width | 120 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |