# NTSB SEA76DYG74: Bell 47G-3B, N6712D, Cashmere, WA, September 15, 1976

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: September 15, 1976
- Place: Cashmere, WA · CASHMERE, WA
- Location: 47.5185° N, 120.4686° W: Placed by OpenAirDocs: center of Cashmere, WA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=47.5185&lon=-120.4686&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report November 5, 1976
- Report: Brief approved by the director
- NTSB case key (mKey): 156180
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA76DYG74
- Page: https://openairdocs.org/ntsb/SEA76DYG74

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3909  76/9/15    CASHMERE,WA         BELL 47G-3B         CR-  0  0  1  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 1400                    N6712D              PX-  0  0  0  AERIAL APPLICATION        AGE 38, 6231 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            1000 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          CASHMERE,WA                 LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      IN FLIGHT: PROCEDURE TURNAROUND
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: TAIL ROTOR GEAR BOX
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL -   53                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - FRUIT ORCHARDS                            TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          PILOT' S SEAT BELT -UNKNOWN/NOT REPORTED                 GLOVES - NOT USED
          GOGGLES - NOT USED                                       CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - NOT INSTALLED                         CRASH BAR - NOT INSTALLED
          TANK/HOPPER-LOCATION - AFT OF PILOT                      TERRAIN-TYPE -LEVEL,FLAT
          ELEVATION-AREA BEING TREATED-FEET -  850                               HILLY
          SWATH RUN-HOW FLOWN - CROSSWIND
        REMARKS- PINION SHAFT SHEARED.
```

## Aircraft

- Registration: [N6712D](https://openairdocs.org/deregistered/N6712D-2012-09-20), registration cancelled 2012-09-20, S/N 2203, built 1957 (OpenAirDocs)
- Reported make and model: BELL 47G-3B
- Registry model: [Bell 47G-3B](https://openairdocs.org/model/bell-47g-3b) (registry code 1181026) (OpenAirDocs)
- Registry engine: [Lycoming TVO-435-GIA](https://openairdocs.org/engine/lycoming-tvo-435-gia) (registry code 41526, turbo-prop) (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 19760915030949A](https://openairdocs.org/incident/19760915030949A), Sep 15, 1976: Bell 47G3B, Cashmere, WA, Substantial damage. Pinion shaft sheared.

## Other investigations on N6712D (5)

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 MIA99LA217](https://openairdocs.org/ntsb/MIA99LA217), Aug 8, 1999: Bell 47G-B3 (N6712D), Selma, AL, substantial damage. Probable cause: The pilot's failure to maintain the proper touchdown point during landing causing the landing skid to become entangled with the edge of the helipad platform and the resultant rollover and main rotor…
- [NTSB SEA79DYP14](https://openairdocs.org/ntsb/SEA79DYP14), Apr 26, 1979: Bell 47G-3B (N6712D), Wenatchee, WA, substantial damage
- [NTSB SEA72DYG40](https://openairdocs.org/ntsb/SEA72DYG40), May 26, 1972: Bell 47G2 (N6712D), Moses Lake, WA, destroyed
- [NTSB SEA69D0183](https://openairdocs.org/ntsb/SEA69D0183), Feb 14, 1969: Bell 47G-2 (N6712D), Chelan, WA, substantial damage
- [NTSB UNK65X0536](https://openairdocs.org/ntsb/UNK65X0536), Nov 2, 1964: Bell 47G2 (N6712D), Yuma, AZ, 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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