# NTSB ANC75AA006: Bell 205A-1, N58087, Umiat, AK, July 21, 1974

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: July 21, 1974
- Place: Umiat, AK · UMIAT, AK
- Location: 69.3669° N, 152.1442° W: Placed by OpenAirDocs: center of Umiat, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=69.3669&lon=-152.1442&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 3 minor
- Status: Completed, report April 1, 1975
- Report: Brief approved by the director
- NTSB case key (mKey): 141183
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC75AA006
- Page: https://openairdocs.org/ntsb/ANC75AA006

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4266  74/7/21  NR.UMIAT,ALAS         BELL 205A-1         CR-  0  1  3  COMMERCIAL                COMMERCIAL, AGE 31, 11595
        TIME - 1510                    N58087              PX-  0  0  0  AIR TAXI-CARGO            TOTAL HOURS, 1374 IN
                                       DAMAGE-DESTROYED    OT-  0  0  0                            TYPE, INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         UMIAT,ALAS                   68-47N,154-23W
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           ROTORCRAFT - FLIGHT CONTROL SYSTEMS: TAIL ROTOR PITCH CONTROL SYSTEM
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- T/R SILENT CHAIN FAILED.
```

## Aircraft

- Registration: [N58087](https://openairdocs.org/deregistered/N58087-1992-05-07), registration cancelled 1992-05-07, S/N 30134 (OpenAirDocs)
- Reported make and model: BELL 205A-1
- Registry model: [Bell 205A-1](https://openairdocs.org/model/bell-205a-1) (registry code 1181414) (OpenAirDocs)
- Category: Helicopter
- Engines: turbo shaft
- Damage: Destroyed

## 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 19740721044129A](https://openairdocs.org/incident/19740721044129A), Jul 21, 1974: Bell UHIBWILCO, Umiat, AK, Destroyed. T/r silent chain 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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