CEN10CA545 · Aerospatiale AS 355F1
Aircam National Helicopter Services Aerospatiale AS 355F1 · Accident: hard landing
From Basecamp LZ, CO to Basecamp LZ, CO
Event
- NTSB case
- CEN10CA545
- 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
- Unknown
- 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
Aerospatiale AS 355F1
- Aircraft type
- Aerospatiale AS-355
- 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
- N5802W
- Onboard fatalities
- Unknown
- Route
- From Basecamp LZ, COTo Basecamp LZ, CO
- 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
- Landing · flare/touchdown
- Defining eventThe 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
- Hard landing
- 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
- Environmental issues › Conditions/weather/phenomena
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The pilot was operating his dual turbine-engine helicopter near a mountain in an effort to film an automobile driving on a road below. The pilot stated that he had operated around this particular mountain several times a year over the past 24 years and had established a flight profile which minimized the associated risks. One sharp turn in the road near the peak required the pilot to fly outbound from the mountain and make a gentle 180-degree turn back to film the automobile. When the pilot flew outbound from the mountain the flying conditions were normal. However, after turning 180 degrees and on the inbound leg towards the mountain, the helicopter encountered a downdraft and was pushed toward the rising terrain. Helicopter performance at that altitude did not provide the pilot with a power margin great enough to arrest the descent. The pilot elected to perform a landing to the road rather than risk a turn down the rocky mountain slope. The helicopter subsequently touched down hard and rolled over, resulting in substantial damage to the fuselage.
Probable cause
The helicopter's encounter with an unexpected downdraft, which resulted in a hard landing.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record CEN10CA545
- Event ID
- 20100916X10056
- Case number
- CEN10CA545
- Dataset
- full-current
- Source SHA-256
- 5cf380f0061817c0331a6b2d8cc7e0ee3a79bea469a1001dc5c10e56f35f5ab3
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: a73113a9d59dc2aec497e0e8aa6ae3e868ed62b3ed055dbff630001d204f626d; retrieved 2026-09-15T15:13:26.020Z.