# NTSB ANC76DAG17: Hiller Acft UH-12E, N5359V, Kenai, AK, July 21, 1975

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 21, 1975
- Place: Kenai, AK · KENAI, AK
- Location: 60.5618° N, 151.2105° W: Placed by OpenAirDocs: center of Kenai, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=60.5618&lon=-151.2105&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report February 25, 1976
- Report: Brief approved by the director
- NTSB case key (mKey): 150436
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC76DAG17
- Page: https://openairdocs.org/ntsb/ANC76DAG17-150436

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3835  75/7/21  NR.KENAI,AK           HILLER ACFT UH-12E  CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 26, 2300
        TIME - 1230                    N5359V              PX-  0  0  0  BUSINESS                  TOTAL HOURS, 249 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - DRIFT RIVER
        DEPARTURE POINT             INTENDED DESTINATION
         KENAI,AK                     WEST FORELAND,AK
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      TAKEOFF: VERTICAL
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: TAIL ROTOR GEAR BOX
           MISCELLANEOUS ACTS,CONDITIONS - OVER TORQUED
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- OUTPUT SHAFT STOP NUT FAILED.
```

## Aircraft

- Registration: [N5359V](https://openairdocs.org/deregistered/N5359V-2013-06-07), registration cancelled 2013-06-07, S/N 2098, built 1961 (OpenAirDocs)
- Reported make and model: HILLER ACFT UH-12E
- Registry model: [Hiller UH-12E](https://openairdocs.org/model/hiller-uh-12e) (registry code 4360122) (OpenAirDocs)
- Registry engine: [Allison 250 series](https://openairdocs.org/engine/allison-250-series) (registry code 03014, turbo-prop) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Destroyed
- Airport: Drift River

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19750721023499A](https://openairdocs.org/incident/19750721023499A), Jul 21, 1975: Hiller UH12E, Kenai, AK, Substantial damage. Output shaft stop nut failed.

## Other investigations on N5359V (3)

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 LAX84LA428](https://openairdocs.org/ntsb/LAX84LA428), Aug 4, 1984: Hiller UH-12ET (N5359V), Delano, CA, substantial damage
- [NTSB SEA80DYE32](https://openairdocs.org/ntsb/SEA80DYE32), May 15, 1980: Hiller Acft UH-12E (N5359V), Forks, WA, destroyed
- [NTSB SEA78FYE16](https://openairdocs.org/ntsb/SEA78FYE16), Mar 20, 1978: Hiller Acft UH-12E (N5359V), Forks, WA, 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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