# NTSB ANC67A0059: Hiller UH12EL, N5353V, Tyonek, AK, May 30, 1967

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: May 30, 1967
- Place: Tyonek, AK · TYONEK, AK
- Location: 61.0681° N, 151.1369° W: Placed by OpenAirDocs: center of Tyonek, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=61.0681&lon=-151.1369&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 August 3, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 116784
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC67A0059
- Page: https://openairdocs.org/ntsb/ANC67A0059

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0226  67/5/30  NR.TYONEK,ALAS        HILLER UH12EL       CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, FL.INSTR.,
        TIME - 1100                    N5353V              PX-  0  0  0  AERIAL SURVEY             AGE 29, 1218 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            124 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - SURVEY SITE
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: INITIAL CLIMB
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: CLUTCH ASSEMBLY
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- CLUTCH SLIPPAGE DUE TO EXCESSIVELY WORN FRICTION SHOES. 78 HRS SINCE INSTALLATION OF THIS CLUTCH.
```

## Aircraft

- Registration: N5353V (not matched to a registry record)
- Reported make and model: HILLER UH12EL
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Survey Site

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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