# NTSB OAK66A0050: Beel 47G-2, N6728D, Greenfield, CA, May 6, 1966

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: May 6, 1966
- Place: Greenfield, CA · GREENFIELD, CA
- Location: 36.3240° N, 121.2437° W: Placed by OpenAirDocs: center of Greenfield, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=36.3240&lon=-121.2437&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 23, 1966
- Report: Brief approved by the director
- NTSB case key (mKey): 172373
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK66A0050
- Page: https://openairdocs.org/ntsb/OAK66A0050

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0236   66/5/6    GREENFIELD CALIF    BEEL 47G-2          CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 39, 5045
        TIME - 0700                    N6728D              PX-  0  0  0  AERIAL APPLICATION        TOTAL HOURS, 3700 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: WIRES/POLES                               IN FLIGHT: STARTING SWATH RUN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO SEE AND AVOID OBJECTS OR OBSTRUCTIONS
           PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  DIRECTIONAL CONTROL PROBLEM
                                  SUSPECTED OR KNOWN AIRCRAFT DAMAGE
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - UNKNOWN/NOT REPORTED       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - GRAPES                                    TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          PILOT' S SEAT BELT -FASTENED-PROPERLY                    GLOVES - USED
          GOGGLES - NOT USED                                       CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - NOT INSTALLED                         CRASH BAR - NOT INSTALLED
          TANK/HOPPER-LOCATION - SIDES                             TERRAIN-TYPE -LEVEL,FLAT
          ELEVATION-AREA BEING TREATED-FEET -  400                 SWATH RUN-HOW FLOWN - CROSSWIND
        REMARKS- DARK WIRES DIFFICULT TO SEE. NOT SEEN DURING AFRIAL SURVEY OF FIELD.
```

## Aircraft

- Registration: [N6728D](https://openairdocs.org/deregistered/N6728D-2002-10-17), registration cancelled 2002-10-17, S/N 2224, built 1958 (OpenAirDocs)
- Reported make and model: BEEL 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

## Other investigations on N6728D (3)

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 MIA87FA236](https://openairdocs.org/ntsb/MIA87FA236), Aug 31, 1987: Bell 47G-2 (N6728D), Opa Locka, FL, destroyed, 1 fatal
- [NTSB OAK74FVM01](https://openairdocs.org/ntsb/OAK74FVM01), Jul 5, 1973: Bell 47G-2 (N6728D), Salinas, CA, substantial damage
- [NTSB OAK67A0082](https://openairdocs.org/ntsb/OAK67A0082), May 25, 1967: Bell 47G-2 (N6728D), King City, CA, 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.