# NTSB LAX67A0020: Hiller US-12E, N9747C, Frazier Prk, CA, August 9, 1966

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 9, 1966
- Place: Frazier Prk, CA · FRAZIER PRK, CA
- Location: 34.8142° N, 118.9550° W: Placed by OpenAirDocs: center of Frazier Park, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.8142&lon=-118.9550&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report April 4, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 122453
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX67A0020
- Page: https://openairdocs.org/ntsb/LAX67A0020

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0714   66/8/9  NR.FRAZIER PRK CALIF  HILLER US-12E       CR-  0  0  1  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 1100                    N9747C              PX-  0  0  2  CTR PASSG-D               AGE 46, 4000 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            23 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           HARD LANDING                                             LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
           PILOT IN COMMAND - IMPROPER LEVEL OFF
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  DIRECTIONAL CONTROL PROBLEM
        REMARKS- LOST ROTOR RPM AT HOVER.TAIL ROTOR STRUCK GROUND ON LANDING.
```

## Aircraft

- Registration: [N9747C](https://openairdocs.org/deregistered/N9747C-2014-11-26), registration cancelled 2014-11-26, S/N 2121, built 1962 (OpenAirDocs)
- Reported make and model: HILLER US-12E
- Registry model: [Hiller UH-12E](https://openairdocs.org/model/hiller-uh-12e) (registry code 4360122) (OpenAirDocs)
- Registry engine: [Lycoming VO-540 series](https://openairdocs.org/engine/lycoming-vo-540-series) (registry code 41534, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N9747C (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 OAK66A0007](https://openairdocs.org/ntsb/OAK66A0007), Sep 5, 1965: Huller UH12E (N9747C), Honeydew, CA, 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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