# NTSB OAK68A0036: Hiller UH-12C, N5321V, Riverdale, CA, October 15, 1967

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: October 15, 1967
- Place: Riverdale, CA · RIVERDALE, CA
- Location: 36.4304° N, 119.8672° W: Placed by OpenAirDocs: center of Riverdale, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=36.4304&lon=-119.8672&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report April 22, 1968
- Report: Brief approved by the director
- NTSB case key (mKey): 113624
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK68A0036
- Page: https://openairdocs.org/ntsb/OAK68A0036

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-1078  67/10/15   RIVERDALE,CALIF     HILLER UH-12C       CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 50, 900
        TIME - 0815                    N5321V              PX-  0  0  0  ASSOC CROP CTL ACTIVITY   TOTAL HOURS, 130 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - FIVE POINTS
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: MAIN ROTOR                      TAKEOFF: INITIAL CLIMB
           HARD LANDING                                             LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: CLUTCH ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - OVERHEATED
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - UNKNOWN/NOT REPORTED       KIND OF OPERATION - DEFOLIATION (DUST)
          KIND OF CROP - COTTON                                    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 -LEVEL,FLAT
        REMARKS- SLIPPAGE DUE TO SHOES;GLAZED,CRACKED.CLUTCH HOUSING SHOE CONTACT AREA WORN,DISTORTED.
```

## Aircraft

- Registration: [N5321V](https://openairdocs.org/aircraft/N5321V), registered now, S/N 822, built 1956 (OpenAirDocs)
- Reported make and model: HILLER UH-12C
- Registry model: [Hiller UH-12C](https://openairdocs.org/model/hiller-uh-12c) (registry code 4360116) (OpenAirDocs)
- Registry engine: [Franklin 6V-335 series](https://openairdocs.org/engine/franklin-6v-335-series) (registry code 27039, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Five Points

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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