# NTSB OAK65A0069: Hiller UH12, N9791C, Willows, CA, May 28, 1965

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: May 28, 1965
- Place: Willows, CA · WILLOWS, CA
- Location: 39.5148° N, 122.1992° W: Placed by OpenAirDocs: center of Willows, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.5148&lon=-122.1992&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report July 6, 1965
- Report: Brief approved by the director
- NTSB case key (mKey): 179174
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK65A0069
- Page: https://openairdocs.org/ntsb/OAK65A0069-179174

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0238  65/5/28  NR.WILLOWS CALIF      HILLER UH12         CR-  0  0  1  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 0515                    N9791C              PX-  0  0  0  ASSOC CROP CTL ACTIVITY   AGE 46, 10150 TOTAL
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            HOURS, 115 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           MISCELLANEOUS                                            IN FLIGHT: EN ROUTE TO RELOADING AREA
           COLLISION WITH GROUND/WATER: UNCONTROLLED                LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
          PERSONNEL-USED IMPROPER SIZE SPRAY BRACE-TOO WEAK
           INSTRUMENTS/EQUIPMENT AND ACCESSORIES - MISCELLANEOUS EQUIPMENT: SPRAY,DUSTING EQUIPMENT
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - WRONG PART
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 8000                       KIND OF OPERATION - SPRAYING FORESTS
          KIND OF CROP - FOREST-TREES                              TYPE OF CHEMICAL USED - LIQUID CHEMICAL-NONTOXIC
          PILOT' S SEAT BELT -FASTENED-PROPERLY                    GLOVES - USED
          GOGGLES - NOT USED                                       CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - NOT INSTALLED                         CRASH BAR - NOT INSTALLED
          TANK/HOPPER-LOCATION - BELLY                             TERRAIN-TYPE -MOUNTAINOUS
          ELEVATION-AREA BEING TREATED-FEET -  2150                SWATH RUN-HOW FLOWN - WIND CALM
        REMARKS- PLT INSTLD SPRAY RIG FAILD IN FLITE-HIT ROTOR.
```

## Aircraft

- Registration: N9791C (not matched to a registry record)
- Reported make and model: HILLER UH12
- Category: Helicopter
- Engines: reciprocating
- Damage: 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.

---
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.