# NTSB DEN81DTM40: Grumman AG-CAT, N5397, Park Valley, UT, July 14, 1981

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 14, 1981
- Place: Park Valley, UT · PARK VALLEY, UT
- Location: 41.8174° N, 113.3292° W: Placed by OpenAirDocs: center of Park Valley, UT, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.8174&lon=-113.3292&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 28, 1981
- Report: Brief approved by the director
- NTSB case key (mKey): 123909
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN81DTM40
- Page: https://openairdocs.org/ntsb/DEN81DTM40

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2487  81/7/14    PARK VALLEY,UT      GRUMMAN AG-CAT      CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 24, 1521
        TIME - 0815                    N5397               PX-  0  0  0  ASSOC CROP CTL ACTIVITY   TOTAL HOURS, 156 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          PARK VALLEY,UT              LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           STALL: MUSH                                              IN FLIGHT: RETURN TO STRIP
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO OBTAIN/MAINTAIN FLYING SPEED
        FACTOR(S)
           WEATHER - DOWNDRAFT,UPDRAFTS
        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                                                      60
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          290                                                       7
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - UNKNOWN/NOT REPORTED       KIND OF OPERATION - UNKNOWN/NOT REPORTED
          KIND OF CROP - UNKNOWN/NOT REPORTED                      TYPE OF CHEMICAL USED - UNKNOWN/NOT REPORTED
          PILOT' S SEAT BELT -UNKNOWN/NOT REPORTED                 TANK/HOPPER-LOCATION - UNKNOWN/NOT REPORTED
          SWATH RUN-HOW FLOWN - UNKNOWN/NOT REPORTED
```

## Aircraft

- Registration: [N5397](https://openairdocs.org/deregistered/N5397-2012-09-05), registration cancelled 2012-09-05, S/N 1151, built 1973 (OpenAirDocs)
- Reported make and model: GRUMMAN AG-CAT
- 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 19810714040869A](https://openairdocs.org/incident/19810714040869A), Jul 14, 1981: Grumav G164A, Park Valley, UT, Substantial damage. Ag aircraft crashed during spraying operation in mountainous terrain. Pilot claims unable to hold altitude.

## Other investigations on N5397 (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 ANC06CA039](https://openairdocs.org/ntsb/ANC06CA039), Mar 30, 2006: Grumman-Schweizer G-164A (N5397), Dixon, CA, substantial damage. Probable cause: The pilot's failure to attain altitude/clearance during takeoff/initial climb, which resulted in an in-flight collision with terrain. Factors associated with the accident were the pilot's inadequate…

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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