Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Deadhorse, Alaska 99734
Thursday, October 11, 1990 17:30 AKD
NTSB Narrative Summary Released at Completion of Accident
The airplane with a certificated airline transport pilot and two passengers aboard departed on a US Department of the Interior, public use flight over the Arctic Ocean. The purpose of the flight was to locate radio collared polar bears. Radar contact with the airplane was lost while it was maneuvering at 22,000 feet msl about 200 miles from shore. The airplane did not reach the intended destination, and neither the airplane nor its occupants were located during an extensive search.
NTSB Probable Cause Narrative
Missing aircraft.
Event Information
| Type of Event | Accident |
| Event Date | 10/11/1990 |
| Event Day of the Week | Thursday |
| Time of Event | 1730 |
| Event Time Zone | -- |
| Event City | Deadhorse |
| Event State | ALASKA |
| Event Country | -- |
| Zipcode of the event site | 99734 |
| Event Date Year | 1990 |
| Event Date Month | 10 |
| MidAir Collision Indicator | -- |
| On Ground Collision occurred ? | -- |
| Event Location Latitude | 702000N |
| Event Location Longitude | 1505600W |
| Event Location Airport | -- |
| 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 | Full |
| Investigator's weather source | Unknown |
| Time of the weather observation | |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | -- |
| Elevation of weather observation facility | -- |
| Distance of event from weather observation facility (units?) | -- |
| Time Zone of the weather observation | -- |
| Lighting Conditions | Day |
| Lowest Ceiling Height | -- |
| Lowest Non-Ceiling Height | -- |
| Sky/Lowest/Cloud Conditions | -- |
| Sky Condition for Lowest Ceiling | -- |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | -- |
| Air Temperature at event time (in degrees celsius) | -- |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | -- |
| Variable Wind Indicator | -- |
| Wind Speed (knots) | -- |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Unknown |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | -- |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | Fatal |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | 3 |
| Injury Total Minor | -- |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 3 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 13452 |
| NTSB Notification Source | ANC FAA, ROC |
| NTSB Notification Date | Oct 11 1990 12:00AM |
| NTSB Notification Time | 2221 |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | May 30 2003 9:51AM |
| User who most recently changed record | NTSB\MONR |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | Fairbanks FSDO |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N45Q |
| NTSB Number | ANC91GAMS1 |
| Missing Aircraft Indicator | Y |
| Federal Aviation Reg. Part | Public Use |
| Type of Flight Plan filed | VFR |
| Flight plan Was Activated? | Yes |
| Damage | Destroyed |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Gulfstream Aerospace |
| Aircraft Model | 690C |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 11623 |
| Certified Max Gross Weight | 10325 |
| 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 | 8 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Continuous Airworthiness |
| Date of Last Inspection | Oct 1 1991 12:00AM |
| Airframe hours since last inspection | 13.8 |
| Airframe Hours | 3115 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | Bowhead Equipment Comapny |
| Aircraft Owner Street Address | P.O.Box 3757 |
| Aircraft Owner City | Seattle |
| Aircraft Owner State | WA |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 98124 |
| Operator is an individual? | No |
| Operator Name | Alaska Helicopters Inc |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | P.O. Box 190283 |
| Operator City | Anchorage |
| Operator State | AK |
| Operator Country | USA |
| Operator Zip code | 99519 |
| Operator Code | ERCL |
| Owner has at least one certificate | -- |
| Other Operator of large aircraft? | -- |
| 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) | Public Use |
| Second Pilot on Board | No |
| Departure Point Same as Event | Yes |
| Departure Airport Code | PALP |
| Departure City | Deadhorse |
| Departure State | AK |
| Departure Country | USA |
| Departure Time | 1429 |
| Departure Time Zone | ADT |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | PALP |
| Destination City | Deadhorse |
| Destination State | AK |
| Destination Country | USA |
| Specific Phase of Flight | Unknown |
| Report sent to ICAO? | Yes |
| Evacuation occurred | No |
| Date of most recent change to record | Apr 25 2003 11:51AM |
| User who most recently changed record | PETL |
| Since inspection or accident | Last Inspection |
| Event Location Runway Number and Location | -- |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |