# NTSB SEA76DYG42: Grumman G-164A, N29SK, Nezperce, ID, April 9, 1976

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 9, 1976
- Place: Nezperce, ID · NEZPERCE, ID
- Location: 46.2366° N, 116.2398° W: Placed by OpenAirDocs: center of Nezperce, ID, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=46.2366&lon=-116.2398&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 22, 1976
- Report: Brief approved by the director
- NTSB case key (mKey): 153626
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA76DYG42
- Page: https://openairdocs.org/ntsb/SEA76DYG42

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2319   76/4/9  NR.NEZPERCE,ID        GRUMMAN G-164A      CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 36, 12750
        TIME - 1730                    N29SK               PX-  0  0  0  AERIAL APPLICATION        TOTAL HOURS, 3150 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         NEZPERCE,ID                  LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: SWATH RUN
           GEAR COLLAPSED                                           LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: VALVE ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
           TERRAIN - WET,SOFT GROUND
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 9000                       KIND OF OPERATION - FERTILIZING (DUST)
          KIND OF CROP - GRAIN FIELDS                              TYPE OF CHEMICAL USED - DRY CHEMICAL-NONTOXIC
          PILOT' S SEAT BELT -UNKNOWN/NOT REPORTED                 GLOVES - USED
          GOGGLES - NOT USED                                       CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - NOT INSTALLED                         CRASH BAR - NOT INSTALLED
          TANK/HOPPER-LOCATION - FORWARD OF PILOT                  TERRAIN-TYPE -ROLLING
          ELEVATION-AREA BEING TREATED-FEET -  3100                SWATH RUN-HOW FLOWN - WIND CALM
        REMARKS- NR 7 EXHAUST VALVE PUSHROD BROKE
```

## Aircraft

- Registration: [N29SK](https://openairdocs.org/deregistered/N29SK-2017-08-23), registration cancelled 2017-08-23, S/N 1354, built 1974 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164A
- Registry model: [Grumman Acft ENG Cor-Schweizer G-164A](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164a) (registry code 3952801) (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

## 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 19760409013939A](https://openairdocs.org/incident/19760409013939A), Apr 9, 1976: Gulstm G164C, Nezperce, ID, Substantial damage. Nr 7 exhaust valve pushrod broke

## Other investigations on N29SK (2)

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 CHI03LA142](https://openairdocs.org/ntsb/CHI03LA142), May 29, 2003: Grumman G-164A (N29SK), Seneca, KS, substantial damage. Probable cause: The pilot's failure to maintain directional control while landing. Factors contributing to the accident were the collapse of the left main landing gear strut and the ditch.
- [NTSB SEA90LA103](https://openairdocs.org/ntsb/SEA90LA103), Jun 21, 1990: Grumman G-164A (N29SK), Tekoa, WA, destroyed. Probable cause: FAILURE OF THE PILOT TO MAINTAIN CLEARANCE BETWEEN THE AIRPLANE AND TALL GRASS ADJACENT TO THE GRAVEL STRIP.

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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