# NTSB OAK69D0047: Hiller 12B, N5301V, Arroyo Grande, CA, May 27, 1968

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: May 27, 1968
- Place: Arroyo Grande, CA · ARROYO GRANDE, CA
- Location: 35.1241° N, 120.5845° W: Placed by OpenAirDocs: center of Arroyo Grande, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=35.1241&lon=-120.5845&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 16, 1968
- Report: Brief approved by the director
- NTSB case key (mKey): 109994
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK69D0047
- Page: https://openairdocs.org/ntsb/OAK69D0047

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2188  68/5/27    ARROYO GRANDE,CAL   HILLER 12B          CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 41, 6000
        TIME - 0530                    N5301V              PX-  0  0  0  ASSOC CROP CTL ACTIVITY   TOTAL HOURS, UNK/NR IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: TAIL ROTOR DRIVE SHAFT ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- FATIGUE FAILURE OF CENTERING PIN,P/N24527-1,OF CARDAN JOINT.SUCCESSFUL AUTOROTATIVE LDG.
```

## Aircraft

- Registration: N5301V (not matched to a registry record)
- Reported make and model: HILLER 12B
- 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.

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