# NTSB LAX72DVA13: Grumman G-164, N728Y, Buttnwillow, CA, August 14, 1971

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 14, 1971
- Place: Buttnwillow, CA · BUTTNWILLOW, CA
- Location: 35.4092° N, 119.4407° W: Placed by OpenAirDocs: center of Buttonwillow, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=35.4092&lon=-119.4407&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report March 30, 1972
- Report: Brief approved by the director
- NTSB case key (mKey): 162785
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX72DVA13
- Page: https://openairdocs.org/ntsb/LAX72DVA13

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3011  71/8/14    BUTTNWILLOW,CALIF   GRUMMAN G-164       CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 50, 11000
        TIME - 0630                    N728Y               PX-  0  0  0  ASSOC CROP CTL ACTIVITY   TOTAL HOURS, 2500 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          BUTTNWILLOW,CALIF           LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GEAR COLLAPSED                                           TAKEOFF: RUN
        PROBABLE CAUSE(S)
           AIRFRAME - LANDING GEAR: MAIN GEAR-SHOCK ABSORBING ASSY,STRUTS,ATTACHMENTS,ETC.
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
        FACTOR(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 8000                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - GRAIN FIELDS                              TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          PILOT' S SEAT BELT -UNKNOWN/NOT REPORTED                 GLOVES - NOT USED
          GOGGLES - NOT USED                                       CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - NOT INSTALLED                         CRASH BAR - INSTALLED
          TANK/HOPPER-LOCATION - FORWARD OF PILOT
        REMARKS- L GR LEG FAILED.SPRAYING DYLOX.
```

## Aircraft

- Registration: [N728Y](https://openairdocs.org/deregistered/N728Y-2010-11-10), registration cancelled 2010-11-10, S/N 289, built 1964 (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

## Other investigations on N728Y (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 LAX83LA101](https://openairdocs.org/ntsb/LAX83LA101), Feb 11, 1983: Grumman G164 (N728Y), Avenal, 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.

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