# NTSB OAK79DVG35: Grumman G-164, N641U, Grimes, CA, April 29, 1979

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 29, 1979
- Place: Grimes, CA · GRIMES, CA
- Location: 39.0742° N, 121.8988° W: Placed by OpenAirDocs: center of Grimes, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.0742&lon=-121.8988&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report June 8, 1979
- Report: Brief approved by the director
- NTSB case key (mKey): 136193
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK79DVG35
- Page: https://openairdocs.org/ntsb/OAK79DVG35

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0990  79/4/29  NR.GRIMES,CA          GRUMMAN G-164       CR-  0  0  1  COMMERCIAL                AIRLINE TRANSPORT, AGE
        TIME - 1030                    N641U               PX-  0  0  0  ASSOC CROP CTL ACTIVITY   45, 6200 TOTAL HOURS, 200
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - WORKING STRIP
        DEPARTURE POINT             INTENDED DESTINATION
         GRIMES,CA                    LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: DITCHES                                   LANDING: ROLL
           NOSE OVER/DOWN                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - MISJUDGED CLEARANCE
        FACTOR(S)
           AIRPORTS/AIRWAYS/FACILITIES - AIRPORT CONDITIONS: UNMARKED OBSTRUCTIONS
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 1060                       KIND OF OPERATION - FERTILIZING (DUST)
          KIND OF CROP - OTHER                                     TYPE OF CHEMICAL USED - DRY CHEMICAL-NONTOXIC
          PILOT' S SEAT BELT -UNKNOWN/NOT REPORTED                 GLOVES - USED
          GOGGLES - USED                                           CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - INSTALLED                             CRASH BAR - INSTALLED
          TANK/HOPPER-LOCATION - FORWARD OF PILOT                  TERRAIN-TYPE -LEVEL,FLAT
          ELEVATION-AREA BEING TREATED-FEET -  40                  SWATH RUN-HOW FLOWN - WIND CALM
        REMARKS- TRAILER PARKED AT LEFT EDGE OF RWY.RGT GEAR STRUCK DITCH AS PILOT CLEARED RGT ON LNDG ROLLOUT.
```

## Aircraft

- Registration: [N641U](https://openairdocs.org/deregistered/N641U-2013-02-13), registration cancelled 2013-02-13, S/N 377, built 1965 (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 R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Working Strip

## 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 19790429007799A](https://openairdocs.org/incident/19790429007799A), Apr 29, 1979: Gulstm G164, Grimes, CA, Substantial damage. The right gear struck a small ditch while landing. The aircraft nosed over.

## Other investigations on N641U (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 LAX82DVG26](https://openairdocs.org/ntsb/LAX82DVG26), Jun 7, 1982: Grumman G-164 (N641U), Williams, CA, destroyed

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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