ASN Wikibase Occurrence # 35097
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| Date: | Wednesday 20 November 1991 |
| Time: | 19:14 LT |
| Type: |  Bell 206B-3 JetRanger III |
| Owner/operator: | Aris Helicopter Ltd |
| Registration: | N5011K |
| MSN: | 2580 |
| Year of manufacture: | 1978 |
| Total airframe hrs: | 7949 hours |
| Engine model: | ALLISON 250-C20B |
| Fatalities: | Fatalities: 3 / Occupants: 3 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Davis, Yolo County, California -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | San Francisco, CA (SFO |
| Sacramento, CA (SMF | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
A BELL HELICOPTER 206B III COLLIDED WITH LEVEL TERRAIN DURING NIGHT INSTRUMENT METEOROLOGICAL CONDITIONS. THE PILOT CONTACTED AIR TRAFFIC CONTROL TWENTY MILES SOUTHEAST OF HIS DESTINATION REPORTING INSTRUMENT METEOROLOGICAL CONDITIONS WITH LOW VISIBILITY IN LIGHT RAIN SHOWERS. THE PILOT WAS UNABLE TO MAINTAIN VFR CONDITIONS AND STARTED TO MANEUVER AROUND THE WEATHER. A WITNESS REPORTED SEEING THE HELICOPTER FLYING NORTH, AT AN ALTITUDE BELOW THE LEVEL OF AN INTERSTATE HIGHWAY. THE HELICOPTER HAD TO CLIMB TO CROSS THE INTERSTATE. THE HELICOPTER THEN DESCENDED, IMPACTED THE GROUND, AND DISINTEGRATED. ATC REPORTED LOST RADAR CONTACT WITH THE HELICOPTER. THE SEARCH FOR THE HELICOPTER WAS IMPEDED BY LOCAL DARKNESS AND GROUND FOG. THE PILOT'S DESTINATION AIRPORT LOCATED EIGHT NAUTICAL MILES NORTH OF THE ACCIDENT SITE WAS REPORTING A TEMPERATURE DEWPOINT SPREAD OF THREE DEGREES AND CALM WINDS.
Probable Cause: THE DECISION OF THE PILOT TO CONTINUE NIGHT LOW LEVEL FLIGHT IN FORECASTED ADVERSE WEATHER CONDITIONS. CONTRIBUTING TO THE ACCIDENT WAS THE FOGGY WEATHER AND DARK NIGHT CONDITIONS WHICH RESTRICTED THE PILOT'S VISUAL OUTLOOK.
Accident investigation:
 |
|
Sources:
NTSB LAX92FA047
FAA register: 2. CAA: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?omni=Home-N-Number&nNumberTxt=5011K
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 26-Apr-2016 01:38 | Dr.John Smith | Updated [Time, Location, Nature, Source, Narrative] |
| 11-Apr-2024 11:08 | ASN Update Bot | Updated [Time, Other fatalities, Phase, Nature, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
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