# NTSB LAX68A0024: Bell 47G-2, N6720D, Hntngtn Bch, CA, August 23, 1967

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 23, 1967
- Place: Hntngtn Bch, CA · HNTNGTN BCH, CA
- Location: 33.6980° N, 118.0038° W: Placed by OpenAirDocs: center of Huntington Beach, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=33.6980&lon=-118.0038&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report December 12, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 114467
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX68A0024
- Page: https://openairdocs.org/ntsb/LAX68A0024

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0727  67/8/23    HNTNGTN BCH,CALIF   BELL 47G-2          CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 30, 1379
        TIME - 0555                    N6720D              PX-  0  0  2  CTR PASSG-D               TOTAL HOURS, 78 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - HELIPRT SIGNL OIL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      TAKEOFF: INITIAL CLIMB
           COLLIDED WITH: FENCE,FENCEPOSTS                          LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: TAIL ROTOR DRIVE SHAFT ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - DISCONNECTED
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  DIRECTIONAL CONTROL PROBLEM
        REMARKS- T/R SHORT SHAFT,PN47-644-180-1,SPLINE DAMAGED.ROTATED IN COUPLING PN47-644-130-11.FLOAT EQUIPPED.
```

## Aircraft

- Registration: [N6720D](https://openairdocs.org/aircraft/N6720D), registered now, S/N 2204, built 1958 (OpenAirDocs)
- Reported make and model: BELL 47G-2
- Registry model: [Bell 47G-2](https://openairdocs.org/model/bell-47g-2) (registry code 1181008) (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: Heliprt Signl Oil

## Other investigations on N6720D (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 OAK73DVA62](https://openairdocs.org/ntsb/OAK73DVA62), Jun 9, 1973: Bell 47G-2 (N6720D), Kettlmn Cty, CA, substantial damage
- [NTSB LAX68A0091](https://openairdocs.org/ntsb/LAX68A0091), Mar 24, 1968: Bell 47G-2 (N6720D), Hntngtn Bch, CA, 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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