# NTSB DEN76DTM71: Grumman G-164A, N9533, La Jara, CO, June 20, 1976

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 20, 1976
- Place: La Jara, CO · LA JARA, CO
- Location: 37.2735° N, 105.9597° W: Placed by OpenAirDocs: center of La Jara, CO, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.2735&lon=-105.9597&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report July 23, 1976
- Report: Brief approved by the director
- NTSB case key (mKey): 153991
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN76DTM71
- Page: https://openairdocs.org/ntsb/DEN76DTM71

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1452  76/6/20    LA JARA,CO          GRUMMAN G-164A      CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 46, 6455
        TIME - 1200                    N9533               PX-  0  0  0  AERIAL APPLICATION        TOTAL HOURS, 1340 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          LA JARA,CO                  LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: PROCEDURE TURNAROUND
           COLLIDED WITH: TREES                                     LANDING: FINAL APPROACH
        PROBABLE CAUSE(S)
           POWERPLANT - MISCELLANEOUS: POWERPLANT FAILURE FOR UNDETERMINED REASONS
        FACTOR(S)
           TERRAIN - HIGH OBSTRUCTIONS
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 2655                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - LETTUCE                                   TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          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 -  7600                SWATH RUN-HOW FLOWN - CROSSWIND
          PROCEDURE TURNAROUND - THIRD 1/3 TURN
         FIRE AFTER IMPACT
        REMARKS- PLT EXPOSED TO PARATHION.BLOOD TEST AFTER ACCIDENT WAS NEGATIVE.
```

## Aircraft

- Registration: [N9533](https://openairdocs.org/deregistered/N9533-2020-12-05), registration cancelled 2020-12-05, S/N 1188, built 1973 (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 19760620017439A](https://openairdocs.org/incident/19760620017439A), Jun 20, 1976: Gulstm G164C, La Jara, CO, Substantial damage. Plt exposed to parathion. Blood test after accident was negative.

## Other investigations on N9533 (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 CEN17LA163](https://openairdocs.org/ntsb/CEN17LA163), Apr 17, 2017: Grumman Schweizer G-164 (N9533), Palmer, KS, substantial damage. Probable cause: A crack in the cylinder of the radial engine, which resulted in a loss of engine power and a forced landing on unsuitable terrain.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.