# NTSB SEA80FYP34: Bell 47G-2, N73284, Sunnyside, WA, August 23, 1980

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 23, 1980
- Place: Sunnyside, WA · SUNNYSIDE, WA
- Location: 46.3157° N, 120.0056° W: Placed by OpenAirDocs: center of Sunnyside, WA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=46.3157&lon=-120.0056&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 30, 1980
- Report: Brief approved by the director
- NTSB case key (mKey): 129493
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA80FYP34
- Page: https://openairdocs.org/ntsb/SEA80FYP34

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1952  80/8/23    SUNNYSIDE,WA        BELL 47G-2          CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 45, 9275
        TIME - 0725                    N73284              PX-  0  0  0  ASSOC CROP CTL ACTIVITY   TOTAL HOURS, 7925 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - TRUCK PLATFORM
        DEPARTURE POINT             INTENDED DESTINATION
          SUNNYSIDE,WA                LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: MAIN ROTOR                      TAKEOFF: VERTICAL
           COLLIDED WITH: OBJECT                                    TAKEOFF: VERTICAL
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: CLUTCH ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           TERRAIN - OTHER
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - UNKNOWN/NOT REPORTED       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - CORN                                      TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          PILOT' S SEAT BELT -FASTENED-PROPERLY                    GLOVES - NOT USED
          GOGGLES - NOT USED                                       CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - NOT INSTALLED                         CRASH BAR - NOT INSTALLED
          TANK/HOPPER-LOCATION - SIDES                             ELEVATION-AREA BEING TREATED-FEET -  1000
        REMARKS- HIT TRUCK PLATFORM SUPPORT.
```

## Aircraft

- Registration: [N73284](https://openairdocs.org/deregistered/N73284-2013-08-21), registration cancelled 2013-08-21, S/N 2908, built 1964 (OpenAirDocs)
- Reported make and model: BELL 47G-2
- Registry model: [Bell 47G-3B-1](https://openairdocs.org/model/bell-47g-3b-1) (registry code 1181028) (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
- Airport: Truck Platform

## 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 19800823036989A](https://openairdocs.org/incident/19800823036989A), Aug 23, 1980: Bell 47G2, Sunnyside, WA, Substantial damage. Helicopter was lifting off from platform when failure of clutch occurred.

## Other investigations on N73284 (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 CHI98LA198](https://openairdocs.org/ntsb/CHI98LA198), Jun 10, 1998: Bell 47G (N73284), Le Center, MN, destroyed. Probable cause: the pilot's failure to maintain clearance with the wire. A factor associated with the accident was the wire which the helicopter contacted.
- [NTSB CHI91DER05](https://openairdocs.org/ntsb/CHI91DER05), Jun 11, 1991: Bell 47G3B1 (N73284), Lasalle, MN, substantial damage. Probable cause: THE PILOT'S FAILURE TO MAINTAIN ADEQUATE CLEARANCE FROM THE TERRAIN. A RELATED FACTOR IS THE PILOT'S MISJUDGED ALTITUDE ABOVE THE CROP.
- [NTSB SEA73FYG13](https://openairdocs.org/ntsb/SEA73FYG13), Sep 23, 1972: Bell 47-G2A (N73284), Selah, WA, substantial damage, 1 fatal
- [NTSB SEA71DVQ16](https://openairdocs.org/ntsb/SEA71DVQ16), Dec 21, 1970: Bell 47G-2 (N73284), Sixes, OR, substantial damage
- [NTSB SEA68A0074](https://openairdocs.org/ntsb/SEA68A0074-109548), Jun 27, 1968: Bell 47G3B1 (N73284), Lewiston, ID, destroyed

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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