# NTSB MIA74FLA08: Bell 47D-1, N6579D, Destin, FL, August 5, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 5, 1973
- Place: Destin, FL · DESTIN, FL
- Location: 30.4022° N, 86.4673° W: Placed by OpenAirDocs: center of Destin, FL, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=30.4022&lon=-86.4673&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report October 9, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 189017
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA74FLA08
- Page: https://openairdocs.org/ntsb/MIA74FLA08

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2777   73/8/5    DESTIN,FLA          BELL 47D-1          CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 40, 4500
        TIME - 1615                    N6579D              PX-  0  0  2  MAPPING/PHOTO             TOTAL HOURS, 2900 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          DESTIN,FLA                  LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           HARD LANDING                                             LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: PISTON,PISTON RINGS
           POWERPLANT - ENGINE STRUCTURE: VALVE ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - ACTION,LACK OF
        FACTOR(S)
           TERRAIN - SANDY
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- HOLE BURNED THRU TOP OF PISTON,BURNED EXH VALVE.CAUSE NOT DTMND.MECH THOUGHT RESULT OF DETONATION.
```

## Aircraft

- Registration: [N6579D](https://openairdocs.org/aircraft/N6579D), registered now, S/N 895 (OpenAirDocs)
- Reported make and model: BELL 47D-1
- Registry model: [Bell 47D1](https://openairdocs.org/model/bell-47d1) (registry code 1180802) (OpenAirDocs)
- Registry engine: [Franklin 6VS-335 series](https://openairdocs.org/engine/franklin-6vs-335-series) (registry code 27040, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- 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 19730805027969A](https://openairdocs.org/incident/19730805027969A), Aug 5, 1973: Bell 47D1, Destin, FL, Substantial damage. Hole burned thru top of piston,burned exh valve. Cause not dtmnd. Mech thought result of detonation.

## Other investigations on N6579D (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 MIA70FLD13](https://openairdocs.org/ntsb/MIA70FLD13), Apr 1, 1970: Bell 47D1 (N6579D), Nocatee, FL, substantial damage

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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