Individually Owned: 150,657
Corporate Owned: 137,281
J Lynn Helms Sevier County Air Airport
Aircraft Accident/Incident Report
Umpire, Arkansas 71971
Tuesady, August 24, 2004 14:30 CDT
NTSB Narrative Summary Released at Completion of Accident
The 3,807-hour helciopter pilot had just departed a private heliport on a hot day approximately 70 pounds under the certified gross weight. The pilot stated that the take-off was normal and the helicopter climbed slowly. He then increased the climb rate with a slight rearward cyclic movement. The helicopter responded by initially climbing then it immediately began to descend. During the descent, the pilot attempted to dump the chemical load, but reported that the dump doors failed to operate until his fourth try. Shortly thereafter, the main rotor blades struck trees and the helicopter descended to the ground and came to rest in an upright position. Examination of the helicopter and the dump valves revealed no mechanical deficiencies. Interpolation of the published Hover Ceiling in Ground Effect performance chart revealed that the helicopter was within the performance envelope. According to the Federal Aviation Administration (FAA) Rotorcraft Flying Handbook, pages 11-5 to 11-7, Vortex Ring State (Settling with Power), "Vortex ring state describes an areodynamic condition where a helicopter may be in a vertical descent with up to maximum power applied, and little, or no cyclic authority. The term 'settling with power' comes from the fact that the helicopter keeps settling even though full engine power is applied." The investigator-in-charge (IIC) calculated the density altitude at 3,155 feet.
NTSB Probable Cause Narrative
The pilot's encounter with settling with power resulting in a loss of control. A contributing factor was the high density altitude.
Event Information
| Type of Event | Accident |
| Event Date | 8/24/2004 |
| Event Day of the Week | Tuesday |
| Time of Event | 1430 |
| Event Time Zone | Central Daylight Time |
| Event City | Umpire |
| Event State | ARKANSAS |
| Event Country | -- |
| Zipcode of the event site | 71971 |
| Event Date Year | 2004 |
| Event Date Month | 8 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 341350N |
| Event Location Longitude | 0940335W |
| Event Location Airport | J Lynn Helms Sevier County Air |
| Event Location Nearest Airport ID | DEQ |
| 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 | Unknown |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1553 Central Daylight Time |
| Direction of event from weather observation facility (degrees) | 270 |
| Weather Observation Facility ID | KDEQ |
| Elevation of weather observation facility | 780 |
| Distance of event from weather observation facility (units?) | 21 |
| Time Zone of the weather observation | CDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | -- |
| Lowest Non-Ceiling Height | 4600 |
| Sky/Lowest/Cloud Conditions | Few |
| Sky Condition for Lowest Ceiling | None |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 10 |
| Air Temperature at event time (in degrees celsius) | 33 |
| Dew Point at event time (in degress fahrenheit) | 23 |
| Wind Direction (degrees magnetic) | -- |
| Variable Wind Indicator | Variable |
| Wind Speed (knots) | 6 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 29.86 |
| Density Altitude (feet) | 3155 |
| 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) | 16860 |
| NTSB Notification Source | Operator |
| NTSB Notification Date | Aug 24 2004 12:00AM |
| NTSB Notification Time | 1642 |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Dec 28 2004 12:45PM |
| User who most recently changed record | NTSB\JOHB |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | Little Rock, Arkansas |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N181W |
| NTSB Number | FTW04LA220 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 137: Agricultural |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | No |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Bell |
| Aircraft Model | 212 |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 35058 |
| Certified Max Gross Weight | 11200 |
| Aircraft Category | Helicopter |
| 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 | 2 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | 100 Hour |
| Date of Last Inspection | Aug 13 2004 12:00AM |
| Airframe hours since last inspection | 20.5 |
| Airframe Hours | 5551.4 |
| ELT Installed | Yes |
| ELT Activated | Yes |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | Weyerhaeuser Company |
| Aircraft Owner Street Address | 1500 S. 184 St. |
| Aircraft Owner City | SeaTac |
| Aircraft Owner State | WA |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 98158 |
| Operator is an individual? | No |
| 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 | -- |
| Other Operator of large aircraft? | -- |
| Certified for Part 133 or 137 Operation | Agriculture |
| 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) | Aerial Application |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | -- |
| Departure City | Wickes |
| Departure State | AR |
| Departure Country | USA |
| Departure Time | 1430 |
| 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 | Takeoff - initial climb |
| Report sent to ICAO? | No |
| Evacuation occurred | No |
| Date of most recent change to record | Nov 8 2004 4:25PM |
| User who most recently changed record | CASH |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | NA |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |