# NTSB ANC75AA015: Aerospatle SE3160, N9366, Colorado Sta, AK, August 18, 1974

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: August 18, 1974
- Place: Colorado Sta, AK · COLORADO STA, AK
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 1 minor
- Status: Completed, report April 8, 1975
- Report: Brief approved by the director
- NTSB case key (mKey): 140531
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC75AA015
- Page: https://openairdocs.org/ntsb/ANC75AA015

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4269  74/8/18    COLORADO STA,ALAS   AEROSPATLE SE3160   CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 25, 2200
        TIME - 2000                    N9366               PX-  0  1  0  AIR TAXI-PASSG            TOTAL HOURS, 60 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          GOLDEN ZONE,ALAS            COLORADO STA,ALAS
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: DESCENDING
           COLLISION WITH GROUND/WATER: UNCONTROLLED                LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: TAIL ROTOR DRIVE SHAFT ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - IMPROPERLY INSTALLED
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPER MAINTENANCE (MAINTENANCE PERSONNEL)
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- FLANGE ATTACH SCREWS IMPROPLY INSTALLED.BEARING ASSMBLY COUPLING RIPPED FREE.LND IN MARSH.
```

## Aircraft

- Registration: [N9366](https://openairdocs.org/deregistered/N9366-1975-06-09), registration cancelled 1975-06-09, S/N 1759 (OpenAirDocs)
- Reported make and model: AEROSPATLE SE3160
- Registry model: [Aerospatiale SE3160 ALOUETTE III](https://openairdocs.org/model/aerospatiale-se3160-alouette-iii) (registry code 8680605) (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 19740818044379A](https://openairdocs.org/incident/19740818044379A), Aug 18, 1974: Aerosp SE3160, Colorado Sta, AK, Destroyed. Flange attach screws improply installed. Bearing assmbly coupling ripped free. Lnd in marsh.

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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