# NTSB SEA79DYP14: Bell 47G-3B, N6712D, Wenatchee, WA, April 26, 1979

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 26, 1979
- Place: Wenatchee, WA · WENATCHEE, WA
- Location: 47.4360° N, 120.3293° W: Placed by OpenAirDocs: center of Wenatchee, WA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=47.4360&lon=-120.3293&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report May 30, 1979
- Report: Brief approved by the director
- NTSB case key (mKey): 136544
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA79DYP14
- Page: https://openairdocs.org/ntsb/SEA79DYP14

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0668  79/4/26  NR.WENATCHEE,WA       BELL 47G-3B         CR-  0  0  1  COMMERCIAL                AIRLINE TRANSPORT, AGE
        TIME - 0900                    N6712D              PX-  0  0  0  AERIAL APPLICATION        27, 3018 TOTAL HOURS, 37
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            IN TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         WENATCHEE,WA                 LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: CONTROLLED                  IN FLIGHT: PROCEDURE TURNAROUND
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL -  261                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - GRAIN FIELDS                              TYPE OF CHEMICAL USED - LIQUID CHEMICAL-NONTOXIC
          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 - SIDES                             TERRAIN-TYPE -MOUNTAINOUS
          ELEVATION-AREA BEING TREATED-FEET -  2100                SWATH RUN-HOW FLOWN - WIND CALM
          PROCEDURE TURNAROUND - SECOND 1/3 TURN
```

## 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 19790426007769A](https://openairdocs.org/incident/19790426007769A), Apr 26, 1979: Bell 47G3B, Wenatchee, WA, Substantial damage. Pilot was spraying crops. He allowed rotor speed to decay and hit ground.

## 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 SEA76DYG74](https://openairdocs.org/ntsb/SEA76DYG74), Sep 15, 1976: Bell 47G-3B (N6712D), Cashmere, 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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