SEA93LA107 · Robinson R-22B
Air Photo Robinson R-22B · Accident: loss of control in flight while maneuvering
From Bozeman Yellowstone International Airport (BZN) to an unrecorded destination
Event
- NTSB case
- SEA93LA107
- 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
Robinson R-22B
- Aircraft type
- Robinson R-22
- 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
- N14NH
- Operator
- Air Photo
- Onboard fatalities
- Unknown
- Route
- From Bozeman Yellowstone International Airport (BZN), Bozeman, MTTo 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 · hover
- 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
- Loss of control in flight
- 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 › Directional control, not maintained
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
THE PILOT USED MAXIMUM POWER TO FLY OVER A MOUNTAIN PASS AND DECIDED TO MAKE A PRECAUTIONARY LANDING AFTER CROSSING THE SUMMIT WHEN THE OIL TEMP REACHED THE MAXIMUM FOR NORMAL OPERATION. HE MADE AN APPROACH TO AN OGE HOVER, THEN FLEW A TRAFFIC PATTERN FOR LANDING. HE MADE AN APPROACH TO A HOVER, ELECTED TO HOVER TAXI TO A SUITABLE LANDING SITE, ENCOUNTERED A GUST OF WIND, AND LOST DIRECTIONAL CONTROL. THE ACFT LOST ROTOR RPM, DESCENDED UNCONTROLLED AND IMPACTED THE GROUND. THE DENSITY ALTITUDE AT THE SITE WAS ABOUT 9380 FT.
Probable cause
THE FAILURE OF THE PILOT TO MAINTAIN DIRECTIONAL CONTROL WHILE HOVERING. FACTORS RELATING TO THE ACCIDENT WERE THE IMPROPER DECISION BY THE PILOT, IMPROPER TOUCHDOWN POINT SELECTION, HIGH DENSITY ALTITUDE, AND WIND GUSTS.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record SEA93LA107
- Event ID
- 20001211X12474
- Case number
- SEA93LA107
- 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: 9b543bd0547975a965e626aed022b5d8fd990ad8049cce10b76c3c8e592017f0; retrieved 2026-09-23T02:06:35.522Z.