Individually Owned: 150,657
Corporate Owned: 137,281
Joe Foss Field Airport
Aircraft Accident/Incident Report
Sioux Falls, South Dakota 57104
Saturday, April 9, 1988 12:15 CDT
NTSB Narrative Summary Released at Completion of Accident
THE ATP PLT AND HIS TWO EMS CREWMEMBERS WERE REPOSITIONING TO REFUEL AT THE LOCAL ARPT. ON APRCH THE PLT HEARD A LOUD SNAP AND EXPERIENCED AN UNCOMMANDED RIGHT YAW. THE HELICOPTER TOUCHED DOWN ON ONE LANDING WHEEL. THE YAW CONTINUED AND THE LEFT LANDING GEAR COLLAPSED. A POST ACCIDENT INSPECTION REVEALED EVIDENCE THAT THE NUMBER THREE HANGAR BEARING HAD FAILED FROM LACK OF LUBRICATON AND SEPARATED THE TAIL ROTOR DRIVE SHAFT AT THE BEARING RACE. ALL OTHER HANGAR BEARINGS SHOWED EVIDENCE OF LACK OF LUBRICATION. THE THROTTLE IS LOCATED ON AN OVERHEAD PANEL ABOVE THE PILOT'S HEAD. DURING THE EMERGENCY, BOTH THE PILOT'S HANDS WERE OCCUPIED WITH THE COLLECTIVE AND THE CYCLIC CONTROLS.
NTSB Probable Cause Narrative
Not Yet Reported
Event Information
| Type of Event | Accident |
| Event Date | 4/9/1988 |
| Event Day of the Week | Saturday |
| Time of Event | 1215 |
| Event Time Zone | Central Daylight Time |
| Event City | SIOUX FALLS |
| Event State | SOUTH DAKOTA |
| Event Country | -- |
| Zipcode of the event site | 57104 |
| Event Date Year | 1988 |
| Event Date Month | 4 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | JOE FOSS FIELD |
| Event Location Nearest Airport ID | FSD |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | 0 |
| Degrees magnetic from airport | 0 |
| Airport Elevation | 1429 |
| Weather Briefing Completeness | Unknown |
| Investigator's weather source | Pilot |
| Time of the weather observation | 1238 |
| Direction of event from weather observation facility (degrees) | 0 |
| Weather Observation Facility ID | FSD |
| Elevation of weather observation facility | 0 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | |
| 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) | 15 |
| Air Temperature at event time (in degrees celsius) | 8 |
| Dew Point at event time (in degress fahrenheit) | -4 |
| Wind Direction (degrees magnetic) | 350 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 23 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Unknown |
| Wind Gust (knots) | 35 |
| Altimeter Setting at event time (in. Hg) | 30 |
| Density Altitude (feet) | 1100 |
| 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 | 3 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 220 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Apr 11 1988 12:00AM |
| NTSB Notification Time | 930 |
| Fiche Number and/or location -used to find docket information | 35838 |
| Date of most recent change to record | Dec 13 2000 11:40AM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N33SV |
| NTSB Number | DEN88LA094 |
| Missing Aircraft Indicator | N |
| 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 | AGUSTA |
| Aircraft Model | A109A |
| Aircraft Series Identifier | A109A |
| Aircraft Serial Number | 7154 |
| Certified Max Gross Weight | 9800 |
| 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 | 4 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | Jul 20 1987 12:00AM |
| Airframe hours since last inspection | 5 |
| Airframe Hours | 2303 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | ICON GROUP INC. |
| Aircraft Owner Street Address | 1 SUMMIT AVE. |
| Aircraft Owner City | WHITE PLAINS |
| Aircraft Owner State | NY |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 10606 |
| Operator is an individual? | -- |
| Operator Name | ROCKY MOUNTAIN HELICOPTERS |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | P.O. BOX 1337 |
| Operator City | PROVO |
| Operator State | UT |
| Operator Country | |
| Operator Zip code | 84603 |
| Operator Code | DYNA |
| Owner has at least one certificate | Yes - certificate holder |
| Other Operator of large aircraft? | No |
| Certified for Part 133 or 137 Operation | External Load |
| 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) | Positioning |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | 1SD9 |
| Departure City | SIOUX FALLS |
| Departure State | SD |
| Departure Country | |
| Departure Time | 1210 |
| 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 | 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 | 0 |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |