# NTSB OAK67A0033: Hiller UH-12E, N9758C, Happy Camp, CA, September 11, 1966

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: September 11, 1966
- Place: Happy Camp, CA · HAPPY CAMP, CA
- Location: 41.8157° N, 123.3926° W: Placed by OpenAirDocs: center of Happy Camp, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.8157&lon=-123.3926&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report November 30, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 121019
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK67A0033
- Page: https://openairdocs.org/ntsb/OAK67A0033

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-1184  66/9/11  NR.HAPPY CAMP,CALIF   HILLER UH-12E       CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 37, 6600
        TIME - 1807                    N9758C              PX-  0  0  0  CTR PASSG-D               TOTAL HOURS, 35 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - THOMPSON CREEK
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: OTHER
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
          PWR PLT-NO.4 CYLINDER CONNECTING ROD BOLT.
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- USFS CONTRACT.ENG FAILED DURING CLIMB TO MTN TOP
```

## Aircraft

- Registration: [N9758C](https://openairdocs.org/deregistered/N9758C-1973-09-11), registration cancelled 1973-09-11, S/N 2186 (OpenAirDocs)
- Reported make and model: HILLER UH-12E
- Registry model: [Hiller UH-12E](https://openairdocs.org/model/hiller-uh-12e) (registry code 4360122) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Thompson Creek

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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