# Accident 20050617011769A: Bolkms BO105S, Billings, MT, June 17, 2005

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: June 17, 2005, 14:50 local time
- Place: Billings, MT
- Damage: Substantial damage
- Phase of flight: Sfl Autorotation
- Operating rules: General operating rules (Part 91)
- Location: 45.8078° N, 108.5428° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=45.8078&lon=-108.5428&mi=10
- Aircraft: N314MS (not matched to a registry record)
- Reported make and model: BOLKMS BO105S
- People aboard: 2
- Fatal injuries: 0
- Pilot flight hours: 2,650 total
- NTSB investigation: [NTSB SEA05LA120](https://openairdocs.org/ntsb/SEA05LA120) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20050617011769A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

(-23) DURING A PROFICIENCY FLIGHT CHECK, THE INSTRUCTOR PILOT TOOK THE CONTROLS OF THE HELICOPTER. AT APPROXIMATELY 100 FEET ABOVE GROUND LEVEL, THE PILOT NOTED THAT THE SINK RATE FELT GREATER THAN THE PREVIOUS AUTOROTATION. THE PILOT WAS LANDING DOWNWIND WHEN THE WIND DIRECTION CHANGED. THE HELICOPTER LANDED HARD AND THE MAIN ROTOR BLADES HIT THE TAIL, SEVERING THE TAIL ROTOR DRIVESHAFT.

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB SEA05LA120](https://openairdocs.org/ntsb/SEA05LA120), Jun 17, 2005: MBB BO-105 (N314MS), Billings, MT, substantial damage. Probable cause: The pilot's improper in-flight decision to continue a simulated engine-out autorotation after sensing an excessive descent rate at 100 feet above the ground. Factors include the excessive descent…

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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