# NTSB CHI69F0152: Sikorsky S-58A, N4247, Robinson Creek, KY, July 28, 1968

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 28, 1968
- Place: Robinson Creek, KY · ROBINSON CREEK, KY
- Location: 37.3870° N, 82.5374° W: Placed by OpenAirDocs: center of Robinson Creek, KY, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.3870&lon=-82.5374&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report April 18, 1969
- Report: Brief approved by the director
- NTSB case key (mKey): 108726
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI69F0152
- Page: https://openairdocs.org/ntsb/CHI69F0152

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4867  68/7/28    ROBINSON CREEK,KY   SIKORSKY S-58A      CR-  0  0  1  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 0655                    N4247               PX-  0  0  1  CONSTRUCTION              AGE 46, 6775 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            1010 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           ROLL OVER                                                LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: OTHER
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           TERRAIN - WET,SOFT GROUND
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- RETAINING BOLTS FAILED IN CAM AND SECOND ORDER BALANCE WEIGHT UNIT.RESULTED IN LOSS OF CAM ACTION.
```

## Aircraft

- Registration: [N4247](https://openairdocs.org/deregistered/N4247-2013-06-18), registration cancelled 2013-06-18, S/N 58807, built 1958 (OpenAirDocs)
- Reported make and model: SIKORSKY S-58A
- Registry model: [Sikorsky S-58B](https://openairdocs.org/model/sikorsky-s-58b) (registry code 8141804) (OpenAirDocs)
- Registry engine: [Wright C9HE series](https://openairdocs.org/engine/wright-c9he-series) (registry code 67029, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N4247 (2)

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 SEA81FA050](https://openairdocs.org/ntsb/SEA81FA050), Aug 7, 1981: Sikorsky S-58B (N4247), Bellevue, WA, destroyed, 2 fatal
- [NTSB NYC71DHD33](https://openairdocs.org/ntsb/NYC71DHD33), Jul 8, 1970: Sikorsky S-58 (N4247), Salem, NJ, no 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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