# NTSB NYC70D0002: Bell 47G-5, N8593F, Clarkstown, NY, December 1, 1969

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: December 1, 1969
- Place: Clarkstown, NY · CLARKSTOWN, NY
- Location: 41.1320° N, 73.9660° W: Placed by OpenAirDocs: center of Town of Clarkstown, NY, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.1320&lon=-73.9660&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report May 22, 1970
- Report: Brief approved by the director
- NTSB case key (mKey): 107186
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC70D0002
- Page: https://openairdocs.org/ntsb/NYC70D0002-107186

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4435   69/12/1   CLARKSTOWN,NY       BELL 47G-5          CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, FL.INSTR.,
        TIME - 0930                    N8593F              PX-  0  0  0  FERRY                     AGE 36, 1508 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            1012 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - RAMAPO VALLEY
        DEPARTURE POINT             INTENDED DESTINATION
          NEW YORK,NY                 SPRING VALLEY,NY
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           COLLIDED WITH: TREES                                     LANDING: FINAL APPROACH
        PROBABLE CAUSE(S)
           POWERPLANT - LUBRICATING SYSTEM: LINES,HOSES,FITTING
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - OIL EXHAUSTION-ENGINE LUBRICATION SYSTEM
           POWERPLANT - ENGINE STRUCTURE: MASTER AND CONNECTING RODS
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           TERRAIN - HIGH OBSTRUCTIONS
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- HOSE FROM OIL COOLER TO ENG BROKE.CAUSED OIL EXHAUSTION AND FAILURE OF NR 2 CONNECTING ROD BEARING
```

## Aircraft

- Registration: [N8593F](https://openairdocs.org/aircraft/N8593F), registered now, S/N 7820, built 1966 (OpenAirDocs)
- Reported make and model: BELL 47G-5
- Registry model: [Bell 47G-5](https://openairdocs.org/model/bell-47g-5) (registry code 1181032) (OpenAirDocs)
- Registry engine: [Lycoming VO-435 series](https://openairdocs.org/engine/lycoming-vo-435-series) (registry code 41525, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Ramapo Valley

## Other investigations on N8593F (3)

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 NYC79FHJ21](https://openairdocs.org/ntsb/NYC79FHJ21), Jul 6, 1979: Bell 47G-5 (N8593F), Jamesport, NY, destroyed, 1 fatal
- [NTSB NYC78FA079](https://openairdocs.org/ntsb/NYC78FA079), Aug 13, 1978: Bell 47G (N8593F), Riverhead, NY, substantial damage
- [NTSB NYC71FHJ07](https://openairdocs.org/ntsb/NYC71FHJ07), Sep 2, 1970: Bell 47-G5 (N8593F), Wading River, NY, 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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