# Accident 19911101048869A: Robsin R22BETA, Riverside, CA, November 1, 1991

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: November 1, 1991, 16:43 local time
- Place: Riverside, CA
- Damage: Substantial damage
- Phase of flight: Pwr Off Vert Land/Autorotate
- Operating rules: General operating rules (Part 91)
- Location: 33.2002° N, 117.3497° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=33.2002&lon=-117.3497&mi=10
- Aircraft: N549SM (not matched to a registry record)
- Reported make and model: ROBSIN R22BETA
- Reported engine: LYC O320B2C
- People aboard: 1
- Fatal injuries: 0
- Pilot flight hours: 150 total, 63 in this make and model, 83 in the last 90 days
- NTSB investigation: [NTSB LAX92LA034](https://openairdocs.org/ntsb/LAX92LA034) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19911101048869A

## Narrative

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

ENGINE OVERSPEED AND ROTOR RPM DECAY. AUTOROTATED TO HARD LANDING. ROLLED. MAIN ROTOR DRIVE BELT SPLIT. CAME OFF.

## 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 LAX92LA034](https://openairdocs.org/ntsb/LAX92LA034), Nov 2, 1991: Robinson R-22B (N549SM), Riverside, CA, substantial damage. Probable cause: THE FAILURE OF THE ENGINE TO TRANSMISSION DRIVE BELT AND THE PILOTS FAILURE TO CORRECTLY JUDGE OF THE LANDING FLARE DURING THE SUBSEQUENT AUTOROTATION.

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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