# NTSB ANC75AA080: Hughes 369C, N9171F, Wrangell, AK, June 13, 1974

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 13, 1974
- Place: Wrangell, AK · WRANGELL, AK
- Location: 56.4708° N, 132.3767° W: Placed by OpenAirDocs: center of Wrangell, AK, within about 29 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=56.4708&lon=-132.3767&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report January 17, 1975
- Report: Brief approved by the director
- NTSB case key (mKey): 132569
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC75AA080
- Page: https://openairdocs.org/ntsb/ANC75AA080-132569

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3747  74/6/13  NR.WRANGELL,ALAS      HUGHES 369C         CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 23, 1286
        TIME - 2045                    N9171F              PX-  0  0  0  AIR TAXI-PASSG            TOTAL HOURS, 79 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         WRANGELL,ALAS                LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      TAKEOFF: VERTICAL
           ROLL OVER                                                LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: TAIL ROTOR DRIVE SHAFT ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           TERRAIN - ROUGH/UNEVEN
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- T/R DRIVE SHAFT FAILED FOR UNDET REASON.HAD TO LND ON 30 DEG SLOPE.
```

## Aircraft

- Registration: N9171F (not matched to a registry record)
- Reported make and model: HUGHES 369C
- 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 19740613041689A](https://openairdocs.org/incident/19740613041689A), Jun 13, 1974: Hughes 369HS, Wrangell, AK, Substantial damage. T/r drive shaft failed for undet reason. Had to lnd on 30 deg slope.

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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