LAX93LA050 · Bell 206B-III
Bell 206B-III · Accident: partial loss of engine power (non-mechanical) while maneuvering
From Hilo, HI (no airport) to an unrecorded destination
Event
- NTSB case
- LAX93LA050
- 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
- 0 · 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
- Visual Meteorological Cond
Bell 206B-III
- 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
- N789N
- Operator
- Paramount Pictures
- Onboard fatalities
- Unknown
- Route
- From Hilo, HI (no airport)To not recorded
- 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
- Maneuvering
- 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
- Partial loss of engine power (non-mechanical)
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Substantial
Cause areas
- Pilot in command › In-flight planning/decision, improper
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
THE HELICOPTER WAS EQUIPPED WITH 2 CAMERAS AND WAS DOING FILMING RUNS OF A VOLCANO VENT CRATER AND ITS ASSOCIATED SMOKE PLUME FOR A MOTION PICTURE. THE PILOT SAID THAT ON THE THIRD PASS OVER THE CRATER HE NOTICED THE MAIN ROTOR RPM DECREASING AND SAW THE ROTOR CAUTION LIGHT. HE SAID HE LOWERED THE COLLECTIVE AND INADVERTENTLY ENTERED THE VOLCANO SMOKE AND STEAM CLOUD. AFTER TURNING HE EXITED THE CLOUD AND AUTOROTATED TO THE CRATER BOTTOM. THE MAIN ROTOR STRUCK THE SHEAR ROCK WALL DURING THE FLARE AND SEPARATED FROM THE HELICOPTER. TWO CAMERA OPERATORS ONBOARD SAID THE PILOT ANNOUNCED 'WE'VE GOT A PROBLEM' AS THEY ENTERED THE SMOKE CLOUD. BOTH WITNESSES SAID THEY DID NOT HEAR THE LOW ROTOR WARNING TONE AND PERCEIVED NO CHANGE IN ENGINE SOUND DURING THE EVENT. ONE SAID HE FELT 'SIDEWARD YAWING MOTIONS' DURING THE DESCENT. THE CAMERA OPERATORS SAID THAT AFTER THE HELICOPTER EMERGED FROM THE CLOUD NEAR THE BOTTOM OF THE CRATER THE ROTOR STRUCK THE ROCK WALL.
Probable cause
THE PILOT'S INTENTIONAL FLIGHT IN AND NEAR A VOLCANIC GAS CLOUD WHICH INDUCED A PARTIAL LOSS OF ENGINE POWER DUE TO A LACK OF COMBUSTIBLE OXYGEN IN THE ATMOSPHERE.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record LAX93LA050
- Event ID
- 20001211X16074
- Case number
- LAX93LA050
- 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: a37198ee97883da3b81ed0678c72732694c30c59a7b8fd3e47f5acbbc9c6af33; retrieved 2026-09-21T23:05:02.960Z.