# NTSB FTW68A0092: Bell 47G-4, N1331X, Leeville, LA, May 17, 1968

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: May 17, 1968
- Place: Leeville, LA · LEEVILLE, LA
- Location: 29.2480° N, 90.2076° W: Placed by OpenAirDocs: center of Leeville, LA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=29.2480&lon=-90.2076&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report July 10, 1968
- Report: Brief approved by the director
- NTSB case key (mKey): 111035
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW68A0092
- Page: https://openairdocs.org/ntsb/FTW68A0092

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1396  68/5/17    LEEVILLE,LA         BELL 47G-4          CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 24, 2017
        TIME - 0518                    N1331X              PX-  0  0  2  CTR PASSG-D               TOTAL HOURS, 20 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - PHI HELIPORT
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           MISCELLANEOUS                                            TAKEOFF: VERTICAL
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: CLUTCH ASSEMBLY
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: FREE WHEEL UNIT
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
        FACTOR(S)
           TERRAIN - ROUGH/UNEVEN
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- SLIPPAGE BETWEEN CLUTCH/FREEWHEELING UNIT.24 SPRINGS,3 CUSHIONS BROKE,CAUSED SHEAR SCREWS TO FAIL.
```

## Aircraft

- Registration: [N1331X](https://openairdocs.org/deregistered/N1331X-1972-07-10), registration cancelled 1972-07-10, S/N 6539, built 1966 (OpenAirDocs)
- Reported make and model: BELL 47G-4
- Registry model: [Bell 47G-4](https://openairdocs.org/model/bell-47g-4) (registry code 1181030) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Phi Heliport

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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