# NTSB DEN81FA062: Hughes 369D, N58256, Afton, WY, August 27, 1981

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: August 27, 1981
- Place: Afton, WY · AFTON, WY
- Location: 42.7263° N, 110.9320° W: Placed by OpenAirDocs: center of Afton, WY, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.7263&lon=-110.9320&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed, report March 19, 1982
- Report: Brief approved by the director
- NTSB case key (mKey): 123626
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN81FA062
- Page: https://openairdocs.org/ntsb/DEN81FA062

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3544  81/8/27  NR.AFTON,WY           HUGHES 369D         CR-  0  0  1  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 1300                    N58256              PX-  0  0  1  AIR TAXI-PASSG            AGE 34, 3182 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            145 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         AFTON,WY                     LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: VERTICAL
           ROLL OVER                                                LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - COMPRESSOR ASSEMBLY: STATOR VANE
           MISCELLANEOUS ACTS,CONDITIONS - EXCESSIVE-WEAR/PLAY
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
        FACTOR(S)
           WEATHER - HIGH DENSITY ALTITUDE
           TERRAIN - ROUGH/UNEVEN
        PARTIAL POWER LOSS - UNKNOWN/NOT REPORTED
        COMPLETE POWER LOSS - UNKNOWN/NOT REPORTED
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          SCATTERED                                                UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      80
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          180                                                       10
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
        REMARKS- LWR 1/2 COMP CASE,PN 6877410,SVR EROSION OF ABRADABLE SEAL & A 3RD STAGE VANE,VANE FAIL FM FATIGUE
```

## Aircraft

- Registration: [N58256](https://openairdocs.org/deregistered/N58256-2015-04-30), registration cancelled 2015-04-30, S/N 1080380D, built 1978 (OpenAirDocs)
- Reported make and model: HUGHES 369D
- Registry model: [Hughes Helicopters HUGHES 369D](https://openairdocs.org/model/hughes-helicopters-hughes-369d) (registry code 4470706) (OpenAirDocs)
- Registry engine: [Allison 250-C20 series](https://openairdocs.org/engine/allison-250-c20-series) (registry code 03020, turbo-prop) (OpenAirDocs)
- Category: Helicopter
- Engines: turbo shaft
- Damage: Substantial damage

## Other investigations on N58256 (1)

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.

- [NTSB SEA85LA020](https://openairdocs.org/ntsb/SEA85LA020), Nov 16, 1984: Hughes 369D (N58256), Kings Valley, OR, destroyed

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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