# Accident 19900418010139A: Bell 47G2, Oakdale, MN, April 18, 1990

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: April 18, 1990, 09:30 local time
- Place: Oakdale, MN
- Damage: Substantial damage
- Phase of flight: Pwr Off Vert Land/Autorotate
- Operating rules: Agricultural (Part 137)
- Operator: KHJG
- Location: 45.0102° N, 93.0304° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=45.0102&lon=-93.0304&mi=10
- Aircraft: N5120B, a cancelled registration (https://openairdocs.org/deregistered/N5120B-1997-02-11) (OpenAirDocs)
- Registry model: Bell 47G-2 (registry code 1181008, https://openairdocs.org/model/bell-47g-2) (OpenAirDocs)
- Reported make and model: BELL 47G2
- Reported engine: LYC VO435A1F
- Fatal injuries: 0
- Pilot flight hours: 4,100 total, 1,200 in this make and model
- NTSB investigation: [NTSB MKC90LA088](https://openairdocs.org/ntsb/MKC90LA088) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19900418010139A

## Narrative

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

ENGINE OVERSPEED. AUTOROTATED TO HARD LANDING. JUST OUT OF ANNUAL HAD WORN OUT CLUTCH ASSEMBLY AND PARTS.

## 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 MKC90LA088](https://openairdocs.org/ntsb/MKC90LA088), Apr 18, 1990: Bell 47 (N5120B), Oakdale, MN, substantial damage. Probable cause: A SLIPPING ROTOR DRIVE CLUTCH ASSEMBLY DUE TO IMPROPER MAINTENANCE BY COMPANY PERSONNEL. CONTRIBUTING FACTORS WERE STATIC WIRES IN THE PATH.

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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