# NTSB UNK64X3246: Sikorsky S55, N6872C, Keene Valley, NY, August 6, 1964

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 6, 1964
- Place: Keene Valley, NY · KEENE VALLEY, NY
- Location: 44.1898° N, 73.7860° W: Placed by OpenAirDocs: center of Keene Valley, NY, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=44.1898&lon=-73.7860&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report December 21, 1964
- Report: Brief approved by the director
- NTSB case key (mKey): 182686
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK64X3246
- Page: https://openairdocs.org/ntsb/UNK64X3246

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0701   64/8/6    KEENE VALLEY NY     SIKORSKY S55        CR-  0  0  2  COMMERCIAL                COMMERCIAL, AGE 28, 2000
        TIME - 1105                    N6872C              PX-  0  0  0  AIR TAXI-CARGO            TOTAL HOURS, 100 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           COLLIDED WITH: TREES                                     IN FLIGHT: AUTOROTATIVE DESCENT
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - MISMANAGEMENT OF FUEL
           MISCELLANEOUS ACTS,CONDITIONS - INATTENTIVE TO FUEL SUPPLY
           PILOT IN COMMAND - ATTEMPTED OPERATION W/KNOWN DEFICIENCIES IN EQUIPMENT
           MISCELLANEOUS ACTS,CONDITIONS - FUEL EXHAUSTION
           SYSTEMS - ELECTRICAL SYSTEM: REGULATOR
        FACTOR(S)
           SYSTEMS - ELECTRICAL SYSTEM: BATTERIES
           POWERPLANT - POWERPLANT-INSTRUMENTS: FUEL QUANTITY GAUGE
           TERRAIN - HIGH VEGETATION
           MISCELLANEOUS ACTS,CONDITIONS - ELECTRICAL FAILURE
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- INOPERATIVE VOLTAGE REGULATOR RESULTED IN DEAD BATTERY-INOPERATIVE FUEL GAUGE FROM ELECT FAILURE.
```

## Aircraft

- Registration: [N6872C](https://openairdocs.org/deregistered/N6872C-1967-10-18), registration cancelled 1967-10-18, S/N 55059 (OpenAirDocs)
- Reported make and model: SIKORSKY S55
- Registry model: [Sikorsky S-55B](https://openairdocs.org/model/sikorsky-s-55b) (registry code 8141604) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N6872C (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 NYC68A0038](https://openairdocs.org/ntsb/NYC68A0038), Sep 1, 1967: Sikorsky S-55B (N6872C), Pittsfield, PA, 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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