# NTSB SEA78DYP35: Bell 47G, N6356X, Anatone, WA, June 23, 1978

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 23, 1978
- Place: Anatone, WA · ANATONE, WA
- Location: 46.1354° N, 117.1325° W: Placed by OpenAirDocs: center of Anatone, WA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=46.1354&lon=-117.1325&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report August 16, 1978
- Report: Brief approved by the director
- NTSB case key (mKey): 141257
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA78DYP35
- Page: https://openairdocs.org/ntsb/SEA78DYP35

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1506  78/6/23  NR.ANATONE,WA         BELL 47G            CR-  0  0  1  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 1830                    N6356X              PX-  0  0  1  ASSOC CROP CTL ACTIVITY   AGE 26, 3297 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            777 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         ANATONE,WA                   LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: SURVEY FIELD/AREA
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPERLY SERVICED AIRCRAFT (GROUND CREW)
           MISCELLANEOUS ACTS,CONDITIONS - FUEL CONTAMINATION-EXCLUSIVE OF WATER IN FUEL
           MISCELLANEOUS - FOREIGN MATERIAL AFFECTING NORMAL OPERATIONS
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- BLACK SANDY SUBSTANCE FOUND IN FUEL SYSTEM.
```

## Aircraft

- Registration: [N6356X](https://openairdocs.org/aircraft/N6356X), registered now, S/N CCI-563, built 1963 (OpenAirDocs)
- Reported make and model: BELL 47G
- Registry model: [Continental Copters 47G](https://openairdocs.org/model/continental-copters-47g) (registry code 2390105) (OpenAirDocs)
- Registry engine: [Franklin 6V4 series](https://openairdocs.org/engine/franklin-6v4-series) (registry code 27033, 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 19780623017079A](https://openairdocs.org/incident/19780623017079A), Jun 23, 1978: Bell 47B3, Anatone, WA, Substantial damage. Black sandy substance found in fuel system.

## Other investigations on N6356X (2)

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 ERA13LA390](https://openairdocs.org/ntsb/ERA13LA390), Aug 31, 2013: Continental Copters 47G (N6356X), Sandy Hook, KY, substantial damage. Probable cause: The in-flight disengagement of the tail rotor extension shaft from the tail rotor gearbox, resulting in a loss of tail rotor control.
- [NTSB SEA79FYM51](https://openairdocs.org/ntsb/SEA79FYM51), Jul 18, 1979: Bell 47G (N6356X), Embler, OR, 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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