# NTSB SEA71DWG11: Bell 47G-2, N1657, Manson, WA, August 6, 1970

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 6, 1970
- Place: Manson, WA · MANSON, WA
- Location: 47.8748° N, 120.1628° W: Placed by OpenAirDocs: center of Manson, WA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=47.8748&lon=-120.1628&mi=10
- Phase of flight: [Uncontrolled descent](https://openairdocs.org/ntsb-phases/650) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report June 16, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 191253
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA71DWG11
- Page: https://openairdocs.org/ntsb/SEA71DWG11

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3425   70/8/6    MANSON,WASH         BELL 47G-2          CR-  0  0  1  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 0845                    N1657               PX-  0  0  0  AERIAL APPLICATION        AGE 33, 2365 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            828 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          MANSON,WASH                 LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: TREES                                     IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER OPERATION OF POWERPLANT & POWERPLANT CONTROLS
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
        FACTOR(S)
           WEATHER - HIGH DENSITY ALTITUDE
           TERRAIN - HIGH OBSTRUCTIONS
        WEATHER BRIEFING - NO RECORD OF BRIEFING RECEIVED
        WEATHER FORECAST - UNKNOWN/NOT REPORTED
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          CLEAR                                                    UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      65
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 1800                       KIND OF OPERATION - SEEDING FORESTS
          KIND OF CROP - FOREST-TREES                              TYPE OF CHEMICAL USED - DRY 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 -  6000                              DENSE WITH TREES
        REMARKS- AFT FLT DOWNSLOPE,LOST CTL AT LO ALT OVR TREES DURG R TURN TO FOLLOW FIRE BREAK.DNS ALT ABT 7500FT
```

## Aircraft

- Registration: N1657 (not matched to a registry record)
- Reported make and model: BELL 47G-2
- Category: Helicopter
- Engines: reciprocating
- Damage: 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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