# Incident 20110831020859I: Bell 206B, Frost Proof, FL, August 31, 2011

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: August 31, 2011, 21:15 local time
- Place: Frost Proof, FL
- Damage: Minor damage
- Phase of flight: Cruise/Level Flight
- Operating rules: General operating rules (Part 91)
- Location: 27.7489° N, 81.5265° W: Placed by OpenAirDocs: center of Frostproof, FL, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=27.7489&lon=-81.5265&mi=10
- Aircraft: N56AL, registered now (https://openairdocs.org/aircraft/N56AL) (OpenAirDocs)
- Registry model: Bell 206B (registry code 1181511, https://openairdocs.org/model/bell-206b) (OpenAirDocs)
- Registry engine: Allison 250-C20B (registry code 03081, https://openairdocs.org/engine/allison-250-c20b) (OpenAirDocs)
- Reported make and model: BELL 206B
- Reported engine: ALLISON 250-C20B
- People aboard: 2
- Fatal injuries: 0
- Other injuries: 0
- Pilot certificates: Airline transport, commercial pilot, flight instructor
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20110831020859I

## Narrative

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

WHILE IN FLIGHT, PILOT EXPERIENCED SEVERE VIBRATION, EMERGENCY DESCENT AND LANDING IN AN OPEN FIELD WITHOUT INJURIES.TAIL ROTOR GEARBOX WAS PARTIALLY HELD ON BY ONE OF FOUR BOLTS.IT WAS FOUND THAT (1) TAIL ROTOR BLADE COUNTER WEIGHT LOCATED INSIDE THE END CAP OF THE TAIL ROTOR BLADE HAD DEPARTED THUS CAUSING "UNBALANCING" AND SEVERE VIBRATION TOTHE TAIL ROTOR BLADES AND GEARBOX.

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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