# NTSB DEN70F0034: Hiller UH-12E, N5369V, Graybull, WY, July 10, 1969

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: July 10, 1969
- Place: Graybull, WY · GRAYBULL, WY
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report August 26, 1969
- Report: Brief approved by the director
- NTSB case key (mKey): 168093
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN70F0034
- Page: https://openairdocs.org/ntsb/DEN70F0034

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2102  69/7/10    GRAYBULL,WYO        HILLER UH-12E       CR-  1  0  0  COMMERCIAL                COMMERCIAL, AGE 26, 1949
        TIME - 0700                    N5369V              PX-  0  0  0  AERIAL APPLICATION        TOTAL HOURS, 69 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            NOT INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: TREES                                     IN FLIGHT: PROCEDURE TURNAROUND
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - MISJUDGED ALTITUDE AND CLEARANCE
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL -  300                       KIND OF OPERATION - SPRAYING FORESTS
          KIND OF CROP - FOREST-TREES                              TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          GLOVES - USED                                            GOGGLES - NOT USED
          CRASH HELMET - AVAILABLE USED                            COCKPIT CRASHPAD - NOT INSTALLED
          CRASH BAR - NOT INSTALLED                                TANK/HOPPER-LOCATION - SIDES
          TERRAIN-TYPE -ROLLING                                    ELEVATION-AREA BEING TREATED-FEET -  8500
          SWATH RUN-HOW FLOWN - WIND CALM                          PROCEDURE TURNAROUND - THIRD 1/3 TURN
         FIRE AFTER IMPACT
```

## Aircraft

- Registration: N5369V (not matched to a registry record)
- Reported make and model: HILLER UH-12E
- Category: Helicopter
- Engines: reciprocating
- Damage: 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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