# NTSB SEA73DYG02: Bell 47G-2, N6717D, Twisp, WA, July 7, 1972

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 7, 1972
- Place: Twisp, WA · TWISP, WA
- Location: 48.3610° N, 120.1171° W: Placed by OpenAirDocs: center of Twisp, WA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=48.3610&lon=-120.1171&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report March 15, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 167231
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA73DYG02
- Page: https://openairdocs.org/ntsb/SEA73DYG02

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3079   72/7/7    TWISP,WASH          BELL 47G-2          CR-  0  0  1  COMMERCIAL                PRIVATE, AGE 26, 1359
        TIME - 1915                    N6717D              PX-  0  0  0  AERIAL APPLICATION        TOTAL HOURS, 48 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - TWISP MUNI
        DEPARTURE POINT             INTENDED DESTINATION
          TWISP,WASH                  LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: WIRES/POLES                               IN FLIGHT: SWATH RUN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO SEE AND AVOID OBJECTS OR OBSTRUCTIONS
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SUNGLARE
           TERRAIN - HIGH OBSTRUCTIONS
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 1400                       KIND OF OPERATION - SPRAYING FORESTS
          KIND OF CROP - MOSQUITO CONTROL                          TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          PILOT' S SEAT BELT -UNKNOWN/NOT REPORTED                 GLOVES - NOT USED
          GOGGLES - NOT USED                                       CRASH HELMET - AVAILABLE USED
          TERRAIN-TYPE -ROLLING                                    ELEVATION-AREA BEING TREATED-FEET -  1690
```

## Aircraft

- Registration: [N6717D](https://openairdocs.org/deregistered/N6717D-2012-11-26), registration cancelled 2012-11-26, S/N 2210, built 1958 (OpenAirDocs)
- Reported make and model: BELL 47G-2
- Registry model: [Bell 47G-2](https://openairdocs.org/model/bell-47g-2) (registry code 1181008) (OpenAirDocs)
- Registry engine: [Lycoming VO-435 series](https://openairdocs.org/engine/lycoming-vo-435-series) (registry code 41525, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Twisp Muni

## Other investigations on N6717D (6)

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 SEA75FYG10](https://openairdocs.org/ntsb/SEA75FYG10), Aug 27, 1974: Bell 47G-2 (N6717D), Quincy, WA, destroyed
- [NTSB SEA75DYG07](https://openairdocs.org/ntsb/SEA75DYG07), Aug 14, 1974: Bell 47G-2 (N6717D), Royal City, WA, substantial damage
- [NTSB SEA68D0297](https://openairdocs.org/ntsb/SEA68D0297), May 10, 1968: Bell 47G-2 (N6717D), Mansfield, WA, substantial damage
- [NTSB SEA68D0296](https://openairdocs.org/ntsb/SEA68D0296), Apr 24, 1968: Bell 47G-2 (N6717D), Bridgeport, WA, substantial damage
- [NTSB ANC67A0014](https://openairdocs.org/ntsb/ANC67A0014), Jul 24, 1966: Bell 47G-2 (N6717D), Tyonek, AK, substantial damage
- [NTSB UNK65X0560](https://openairdocs.org/ntsb/UNK65X0560), Nov 4, 1964: Bell 47G2 (N6717D), Umiat, AK, 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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