# NTSB MKC76AK003: Sikorsky S-55B, N111RS, Pine Ridge, SD, July 4, 1975

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: July 4, 1975
- Place: Pine Ridge, SD · PINE RIDGE, SD
- Location: 43.0269° N, 102.5524° W: Placed by OpenAirDocs: center of Pine Ridge, SD, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.0269&lon=-102.5524&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor, 3 uninjured
- Status: Completed, report October 21, 1975
- Report: Brief approved by the director
- NTSB case key (mKey): 150521
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC76AK003
- Page: https://openairdocs.org/ntsb/MKC76AK003

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3317   75/7/4    PINE RIDGE,SD       SIKORSKY S-55B      CR-  0  0  2  MISCELLANEOUS             COMMERCIAL, AGE 35, 3500
        TIME - 1925                    N111RS              PX-  0  0  2  OTHER PUBLIC              TOTAL HOURS, 400 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          PINE RIDGE,SD               LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: MAIN ROTOR                      IN FLIGHT: OTHER
           COLLISION WITH GROUND/WATER: UNCONTROLLED                LANDING: OTHER
        PROBABLE CAUSE(S)
           ROTORCRAFT - ROTOR ASSEMBLIES: MAIN ROTOR BLADES
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           TERRAIN - ROUGH/UNEVEN
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- PART FM MAIN RTR BLADE SEPARATED IN FLT AND NOT FOUND.PLT CRASH LND ON SIDE OF HILL,NO COLLECTIVE.
```

## Aircraft

- Registration: [N111RS](https://openairdocs.org/deregistered/N111RS-1982-09-15), registration cancelled 1982-09-15, S/N 55834 (OpenAirDocs)
- Reported make and model: SIKORSKY S-55B
- Registry model: [Sikorsky S-55B](https://openairdocs.org/model/sikorsky-s-55b) (registry code 8141604) (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 19750704031429A](https://openairdocs.org/incident/19750704031429A), Jul 4, 1975: Skrsky S55B, Pine Ridge, SD, Substantial damage. Part fm main rtr blade separated in flt and not found. Plt crash lnd on side of hill,no collective.

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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