# NTSB SEA67A0031: Bell 47G, N979B, Tonasket, WA, October 12, 1966

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: October 12, 1966
- Place: Tonasket, WA · TONASKET, WA
- Location: 48.7076° N, 119.4423° W: Placed by OpenAirDocs: center of Tonasket, WA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=48.7076&lon=-119.4423&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report May 23, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 120976
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA67A0031
- Page: https://openairdocs.org/ntsb/SEA67A0031

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-1029  66/10/12   TONASKET WASH       BELL 47G            CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, AGE 51, 14000
        TIME - 0730                    N979B               PX-  0  0  1  FERRY                     TOTAL HOURS, 565 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - TONASKET
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      TAKEOFF: VERTICAL
        PROBABLE CAUSE(S)
           ROTORCRAFT - ROTOR ASSEMBLIES: OTHER
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT.
                                  DIRECTIONAL CONTROL PROBLEM
        REMARKS- T/R HUB ASSY BOLT P/N 47-641-052-3 FAILED-T/R BLADE SEPARATED FROM ASSY.LANDED W/O FURTHER DAMAGE.
```

## Aircraft

- Registration: [N979B](https://openairdocs.org/deregistered/N979B-2006-01-09), registration cancelled 2006-01-09, S/N 1380, built 1955 (OpenAirDocs)
- Reported make and model: BELL 47G
- Registry model: [Bell 47G](https://openairdocs.org/model/bell-47g) (registry code 1181002) (OpenAirDocs)
- Registry engine: [Franklin 6VS-335 series](https://openairdocs.org/engine/franklin-6vs-335-series) (registry code 27040, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Tonasket

## Other investigations on N979B (3)

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 OAK77DVW31](https://openairdocs.org/ntsb/OAK77DVW31), Jun 25, 1977: Bell 47SG (N979B), Ash Springs, NV, substantial damage
- [NTSB SEA70DWG03](https://openairdocs.org/ntsb/SEA70DWG03-115039), Jul 11, 1970: Bell 47G (N979B), Conconully, WA, substantial damage
- [NTSB SEA70D0003](https://openairdocs.org/ntsb/SEA70D0003), Jun 1, 1969: Bell 47G (N979B), Ritzville, WA, substantial damage

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.

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