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LAX85MA012 · Bell 206B

10 Oct 1984 · Riverside, CA, United States

Uco Air Bell 206B · Accident: in flight encounter with weather en route

From Fullerton Municipal Airport (FUL) to Big Bear City Airport (L35)

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Event

NTSB case
LAX85MA012
Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
Accident
InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
Completed
API-reported fatalities
3 · all aircraft and ground
Ground fatalities
0
OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
General aviation
WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
Instrument Meteorological Cond

Bell 206B

Aircraft type
Bell 206
Category
Helicopter
RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
N3U
Operator
Uco Air
Onboard fatalities
Unknown
Route
From Fullerton Municipal Airport (FUL), Fullerton, CATo Big Bear City Airport (L35), Big Bear City, CA
Aircraft age
Not recorded
Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
Part 91: General Aviation
Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
En route · cruise
First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
In flight encounter with weather
Also codedOther events the NTSB coded in the sequence, such as a wire strike after a loss of power. Flight Findings uses them for its kinds of event. Glossary
Visual flight rules (VFR) flight into instrument meteorological conditions (IMC)
DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
Destroyed

Cause areas

  • Pilot in command › Aircraft handling, not maintained
  • Pilot in command › Spatial disorientation
  • Pilot in command › VFR flight into imc, continued

Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.

NTSB narrative

THE ACFT DEPARTED FULLERTON, CA (ELEV 96') AT O958 PDT ON A FLT TO BIG BEAR, CA (ELEV 6750'). THERE WAS NO RECORD OF THE PLT OBTAINING A WX BRIEFING. AT APRX 1015, A WITNESS HEARD THE HELICOPTER CIRCLING ABOVE THE BOTTOM OF 'AN EARLY MORNING FOG HANGING OVER THE GROUND AT APRX 300 FT.' AFTER CIRCLING ABOUT 3 TO 5 MIN, THE HELICOPTER BEGAN TO FLY SOUTH WHEN IT SUDDENLY WAS OBSERVED FLYING OUT OF THE FOG AT A STEEP ANGLE TOWARD THE GROUND. IT WAS ANGLED NOSE DOWN WITH A SLIGHT ROLL TO THE LEFT. SUBSEQUENTLY, THE HELICOPTER CRASHED IN A TAIL LOW, LEFT BANK ATTITUDE. THE ENG WAS REPORTED TO BE OPERATING AT A HI POWER SETTING UNTIL THE HELICPOTER CRASHED & BURNED. NO PREIMPACT PART FAILURE OR MALFUNCTION WAS FOUND. THERE WAS EVIDENCE OF LOW ROTOR RPM, THAT THE CYCLIC CONTROL WAS FULL AFT & THAT THE COLLECTIVE WAS FULL DOWN AT IMPACT. APRX 4 MI EAST, THE 1019 WX WAS, IN PART: SKY PARTIALLY OBSCURED, 1000' OVERCAST, VISIBILITY 3/4 MI WITH FOG.

Verbatim NTSB analysis from the NTSB dataset

Sources

NTSB record LAX85MA012
Event ID
20001214X41423
Case number
LAX85MA012
Dataset
historical-pre2008
Source SHA-256
89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (4)
  • Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
  • Filled from the NTSB case API where the bulk record had no value: investigation status. Values present in the bulk record are kept.
  • The date is the local date, which is the same as the UTC date the NTSB stores.
  • API snapshot SHA-256: e59681b896cb0bfdc92d8eb5392d8ec302fd6f7e20eff50269e81e3f839c1e24; retrieved 2026-09-21T05:18:08.273Z.