# NTSB SEA74DTI29: Bell 47G3B1, N7928S, Lima, MT, June 16, 1974

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 16, 1974
- Place: Lima, MT · LIMA, MT
- Location: 44.6383° N, 112.5918° W: Placed by OpenAirDocs: center of Lima, MT, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=44.6383&lon=-112.5918&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report August 15, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 128747
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA74DTI29
- Page: https://openairdocs.org/ntsb/SEA74DTI29

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1880  74/6/16  NR.LIMA,MONT          BELL 47G3B1         CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 22, 1725
        TIME - 0700                    N7928S              PX-  0  0  0  AERIAL APPLICATION        TOTAL HOURS, 350 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         LIMA,MONT                    LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: CONTROLLED                  IN FLIGHT: STARTING SWATH RUN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER IN-FLIGHT DECISIONS OR PLANNING
           MISCELLANEOUS - VORTEX TURBULENCE
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 1725                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - OTHER                                     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 -ROLLING
          ELEVATION-AREA BEING TREATED-FEET -  7800                SWATH RUN-HOW FLOWN - WIND CALM
          PROCEDURE TURNAROUND - THIRD 1/3 TURN
        REMARKS- PLT HIT OWN ROTOR WASH IN CALM WND. SPRAYING SAGE BRUSH.
```

## Aircraft

- Registration: [N7928S](https://openairdocs.org/aircraft/N7928S), registered now, S/N 6598, built 1966 (OpenAirDocs)
- Reported make and model: BELL 47G3B1
- 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

## 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 19740616015749A](https://openairdocs.org/incident/19740616015749A), Jun 16, 1974: Bell 47G3B1, Lima, MT, Substantial damage. Plt hit own rotor wash in calm wnd. Spraying sage brush.

## Other investigations on N7928S (1)

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 DEN83LA006](https://openairdocs.org/ntsb/DEN83LA006), Oct 2, 1982: Bell 47G3B1 (N7928S), Malta, MT, 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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