# NTSB IAD80FLQ10: Hughes 500D, N9163F, Dione, KY, January 11, 1980

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: January 11, 1980
- Place: Dione, KY · DIONE, KY
- Location: 36.9506° N, 83.0852° W: Placed by OpenAirDocs: center of Dione, KY, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=36.9506&lon=-83.0852&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 3 serious
- Status: Completed, report March 31, 1980
- Report: Brief approved by the director
- NTSB case key (mKey): 132223
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=IAD80FLQ10
- Page: https://openairdocs.org/ntsb/IAD80FLQ10

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0067  80/1/11  NR.DIONE,KY           HUGHES 500D         CR-  0  1  0  NONCOMMERCIAL             COMMERCIAL, AGE 47, 10905
        TIME - 1245                    N9163F              PX-  0  2  0  CORP/EXEC                 TOTAL HOURS, 44 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION         LAST ENROUTE STOP
          GRAY KNOB,KY               DIONE,KY                      MINE SITE 2
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: WIRES/POLES                               LANDING: FINAL APPROACH
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO SEE AND AVOID OBJECTS OR OBSTRUCTIONS
        FACTOR(S)
           TERRAIN - HIGH OBSTRUCTIONS
           WEATHER - RAIN
           WEATHER - OBSTRUCTIONS TO VISION
        WEATHER BRIEFING - BRIEFED BY FLIGHT SERVICE PERSONNEL, BY PHONE
        WEATHER FORECAST - WEATHER SLIGHTLY BETTER THAN FORECAST
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          OVERCAST/LOWER SCATTERED                                  3600
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     RAIN
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          HAZE                                                      55
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          190                                                       10
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
        REMARKS- PLT'S FIRST LNDG AT HLPT. 200' WIRES NOT MARKED.
```

## Aircraft

- Registration: [N9163F](https://openairdocs.org/deregistered/N9163F-1998-03-14), registration cancelled 1998-03-14, S/N 690540D (OpenAirDocs)
- Reported make and model: HUGHES 500D
- Registry model: [Hughes Helicopters HUGHES 369D](https://openairdocs.org/model/hughes-helicopters-hughes-369d) (registry code 4470706) (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 19800111000089A](https://openairdocs.org/incident/19800111000089A), Jan 11, 1980: Hughes 369D, Diane, KY, Destroyed. Helicopter hit wires on approach to landing site. Fell straight down after wire strike.

## Other investigations on N9163F (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 SEA90LA010](https://openairdocs.org/ntsb/SEA90LA010), Oct 27, 1989: Hughes 369D (N9163F), Neah Bay, WA, substantial damage. Probable cause: FATIGUE FAILURE OF ALL FOUR ATTACHMENT STUDS OF THE TAILROTOR GEARBOX RESULTING IN SEPARATION OF THE GEAR BOX, AND INADEQUATE MAINTENANCE INSPECTION.

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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