# NTSB ANC80DA080: Hughes 369, N50SC, Kivalina, AK, August 2, 1980

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 2, 1980
- Place: Kivalina, AK · KIVALINA, AK
- Location: 67.7362° N, 164.5108° W: Placed by OpenAirDocs: center of Kivalina, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=67.7362&lon=-164.5108&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report October 27, 1980
- Report: Brief approved by the director
- Safety recommendations: Yes
- NTSB case key (mKey): 79874
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC80DA080
- Page: https://openairdocs.org/ntsb/ANC80DA080

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2357   80/8/2  NR.KIVALINA,AK        HUGHES 369          CR-  0  0  1  COMMERCIAL                AIRLINE TRANSPORT, AGE
        TIME - 0820                    N50SC               PX-  0  0  1  AIR TAXI-PASSG            42, 4678 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            1188 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          LIK MINE FIELD SITE         KIS CLAIM FIELD SITE
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: POWER-ON DESCENT
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - FUEL SYSTEM: FUEL CONTROL
           MISCELLANEOUS - FOREIGN MATERIAL AFFECTING NORMAL OPERATIONS
           MISCELLANEOUS ACTS,CONDITIONS - RPM-UNCONTROLLABLE-OVERSPEED
        FACTOR(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- METAL CONTAMINATION OF PWR TURB GOVERNOR FRM HI PRESS FILTER BYPASS SEAT.REPLACING FILTER RCMNDD.
```

## Aircraft

- Registration: [N50SC](https://openairdocs.org/deregistered/N50SC-2002-03-22), registration cancelled 2002-03-22, S/N 1140669S, built 1974 (OpenAirDocs)
- Reported make and model: HUGHES 369
- Registry model: [Hughes 369HS](https://openairdocs.org/model/hughes-369hs) (registry code 4470728) (OpenAirDocs)
- Registry engine: [Allison 250 SER 400HP](https://openairdocs.org/engine/allison-250-ser-400hp) (registry code 03013, turbo-shaft) (OpenAirDocs)
- Category: Helicopter
- Engines: turbo shaft
- Damage: Substantial damage

## 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 19800802034249A](https://openairdocs.org/incident/19800802034249A), Aug 2, 1980: Hughes 369HS, Kivalina, AK, Substantial damage. N 2 RPM went into overspeed, throttle back. Made hard autorotate landing. Found fuel governor malfunction.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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