# NTSB SEA74DYE20: Bell 47F-2, N5161B, Forks, WA, October 8, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: October 8, 1973
- Place: Forks, WA · FORKS, WA
- Location: 47.9528° N, 124.3902° W: Placed by OpenAirDocs: center of Forks, WA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=47.9528&lon=-124.3902&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report December 6, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 188285
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA74DYE20
- Page: https://openairdocs.org/ntsb/SEA74DYE20

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3177   73/10/8   FORKS,WASH          BELL 47F-2          CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 45, 5407
        TIME - 1330                    N5161B              PX-  0  0  0  CORP/EXEC                 TOTAL HOURS, 330 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          FORKS,WASH                  LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: MAIN ROTOR                      IN FLIGHT: HOVERING
           COLLISION WITH GROUND/WATER: CONTROLLED                  LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: CLUTCH ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - IMPROPER CLEARANCE-TOLERANCE
           TERRAIN - ROUGH/UNEVEN
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- CLUTCH SHOES,PN 47-G20-609-05 WERE GLAZED. M/R SYSTEM WOULDNT ENGAGE. STUMP COVERED AREA.
```

## Aircraft

- Registration: [N5161B](https://openairdocs.org/deregistered/N5161B-2014-12-17), registration cancelled 2014-12-17, S/N 1979, built 1957 (OpenAirDocs)
- Reported make and model: BELL 47F-2
- Registry model: [Bell 47G-2](https://openairdocs.org/model/bell-47g-2) (registry code 1181008) (OpenAirDocs)
- Registry engine: [Lycoming VO-435 series](https://openairdocs.org/engine/lycoming-vo-435-series) (registry code 41525, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19731008033599A](https://openairdocs.org/incident/19731008033599A), Oct 8, 1973: Bell 47G2, Forks, WA, Substantial damage. Clutch shoes,pn 47-G20-609-05 were glazed. M/r system wouldnt engage. Stump covered area.

## Other investigations on N5161B (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 SEA75DYC40](https://openairdocs.org/ntsb/SEA75DYC40), May 31, 1975: Bell 47G-2A (N5161B), Corvallis, OR, destroyed
- [NTSB SEA74DYE39](https://openairdocs.org/ntsb/SEA74DYE39), Mar 3, 1974: Bell 47G-2 (N5161B), Forks, WA, substantial damage
- [NTSB LAX65A0087](https://openairdocs.org/ntsb/LAX65A0087), Apr 20, 1965: Bell 47G2 (N5161B), Chino, CA, 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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