# NTSB ANC75FAG65: S.N.I.A.S SA318C, N8263, Tonsina, AK, January 14, 1975

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: January 14, 1975
- Place: Tonsina, AK · TONSINA, AK
- Location: 61.6558° N, 145.1753° W: Placed by OpenAirDocs: center of Tonsina, AK, within about 7 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=61.6558&lon=-145.1753&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed, report March 3, 1976
- Report: Brief approved by the director
- NTSB case key (mKey): 148657
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC75FAG65
- Page: https://openairdocs.org/ntsb/ANC75FAG65

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4022  75/1/14    TONSINA,AK          S.N.I.A.S SA318C    CR-  0  1  0  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 1100                    N8263               PX-  0  0  0  AIR TAXI-PASSG            AGE 32, 5030 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            1184 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          TONSINA,AK                  LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      IN FLIGHT: NORMAL CRUISE
           COLLIDED WITH: TREES                                     LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: TAIL ROTOR DRIVE SHAFT ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - LACK OF LUBRICATION-SPECIFIC PART,NOT SYSTEM
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
        FACTOR(S)
           TERRAIN - HIGH OBSTRUCTIONS
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- T/R DRIVE SHAFT COUPLING FAILED.
```

## Aircraft

- Registration: N8263 (not matched to a registry record)
- Reported make and model: S.N.I.A.S SA318C
- 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 19750114007199A](https://openairdocs.org/incident/19750114007199A), Jan 14, 1975: Snias SA318C, Tonsina, AK, Substantial damage. T/r drive shaft coupling failed.

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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