# NTSB SEA75FTA05: Grumman G-164, N664U, Baker, MT, July 25, 1974

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 25, 1974
- Place: Baker, MT · BAKER, MT
- Location: 46.3649° N, 104.2733° W: Placed by OpenAirDocs: center of Baker, MT, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=46.3649&lon=-104.2733&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 24, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 136756
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA75FTA05
- Page: https://openairdocs.org/ntsb/SEA75FTA05

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2852  74/7/25  NR.BAKER,MONT         GRUMMAN G-164       CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 68, 20457
        TIME - 0630                    N664U               PX-  0  0  0  AERIAL APPLICATION        TOTAL HOURS, 2169 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         BAKER,MONT                   LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           STALL: MUSH                                              IN FLIGHT: PULLUP FROM SWATH RUN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO OBTAIN/MAINTAIN FLYING SPEED
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - JETTISONED LOAD
           TERRAIN - HIGH OBSTRUCTIONS
           WEATHER - DOWNDRAFT,UPDRAFTS
           WEATHER - HIGH DENSITY ALTITUDE
        WEATHER BRIEFING - UNKNOWN/NOT REPORTED
        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
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
           90                                                       10
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 6000                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - GRAIN FIELDS                              TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          PILOT' S SEAT BELT -FASTENED-PROPERLY                    GLOVES - USED
          GOGGLES - NOT USED                                       CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - INSTALLED                             CRASH BAR - INSTALLED
          TANK/HOPPER-LOCATION - FORWARD OF PILOT                  TERRAIN-TYPE -HILLY
          ELEVATION-AREA BEING TREATED-FEET -  3000                SWATH RUN-HOW FLOWN - DOWNWIND
        REMARKS- ACFT SETTLD TO GRND DURNG DOWNWND CLMB ON LEEWARD SIDE OF HILL.
```

## Aircraft

- Registration: [N664U](https://openairdocs.org/aircraft/N664U), registered now, S/N 400, built 1966 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164
- Registry model: [Grumman G-164](https://openairdocs.org/model/grumman-g-164) (registry code 3952702) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs)
- Category: Airplane
- 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 19740725023389A](https://openairdocs.org/incident/19740725023389A), Jul 25, 1974: Grumav G164, Baker, MT, Substantial damage. Acft settld to grnd durng downwnd clmb on leeward side of hill.

## Other investigations on N664U (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 LAX92LA028](https://openairdocs.org/ntsb/LAX92LA028), Oct 28, 1991: Grumman G-164 (N664U), Pauma, CA, substantial damage. Probable cause: FUEL STARVATION DUE TO A RESTRICTED FUEL TANK VENT LINE. CONTRIBUTING TO THE ACCIDENT WAS INADEQUATE MAINTENANCE.

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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