# NTSB SEA74DYG10: Bell 47G3B2, N78255, Tonasket, WA, August 3, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 3, 1973
- 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: 3 uninjured
- Status: Completed, report December 7, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 188898
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA74DYG10
- Page: https://openairdocs.org/ntsb/SEA74DYG10

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3176   73/8/3  NR.TONASKET,WASH      BELL 47G3B2         CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 30, 2305
        TIME - 1105                    N78255              PX-  0  0  2  ASSOC FIRE CTL ACTIVITY   TOTAL HOURS, 515 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          OMAK,WASH                   LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: TREES                                     TAKEOFF: ABORTED
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
           PILOT IN COMMAND - FAILED TO MAINTAIN DIRECTIONAL CONTROL
        FACTOR(S)
           WEATHER - HIGH DENSITY ALTITUDE
           TERRAIN - HIGH OBSTRUCTIONS
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          CLEAR                                                    UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      70
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
           20                                                       3
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
        REMARKS- LOST ROTOR RPM.ATMTD LDG ON ROAD,M/R HIT TREE.DENS ALT 5800FT.
```

## Aircraft

- Registration: N78255 (not matched to a registry record)
- Reported make and model: BELL 47G3B2
- Category: Helicopter
- Engines: reciprocating
- Damage: 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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.