# NTSB OAK70F0212: Bell 47G3B1, N1320X, Hamiltn Afb, CA, December 30, 1969

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: December 30, 1969
- Place: Hamiltn Afb, CA · HAMILTN AFB, CA
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report May 22, 1970
- Report: Brief approved by the director
- NTSB case key (mKey): 150731
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK70F0212
- Page: https://openairdocs.org/ntsb/OAK70F0212

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4434  69/12/30   HAMILTN AFB,CALIF   BELL 47G3B1         CR-  1  0  0  COMMERCIAL                COMMERCIAL, AGE 46, 8119
        TIME - 1025                    N1320X              PX-  0  0  0  CONSTRUCTION              TOTAL HOURS, 579 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - HAMILTON AFB
        DEPARTURE POINT             INTENDED DESTINATION
          HAMILTN AFB,CALIF           HAMILTN AFB,CALIF
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      IN FLIGHT: OTHER
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           MISCELLANEOUS - FOREIGN OBJECT DAMAGE
           ROTORCRAFT - FLIGHT CONTROL SYSTEMS: TAIL ROTOR PITCH CONTROL SYSTEM
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        EMERGENCY CIRCUMSTANCES - DIRECTIONAL CONTROL PROBLEM
                                  PITCH CONTROL PROBLEM
         FIRE AFTER IMPACT
        REMARKS- WIRE STRINGING FLT.CARGO HOOK BROKE LOOSE FROM GRND CABLE UNK CAUSE,SEVERED T/R CONTROL CABLE.
```

## Aircraft

- Registration: [N1320X](https://openairdocs.org/deregistered/N1320X-1971-02-03), registration cancelled 1971-02-03, S/N 6544 (OpenAirDocs)
- Reported make and model: BELL 47G3B1
- Registry model: [Bell 47G-3B-1](https://openairdocs.org/model/bell-47g-3b-1) (registry code 1181028) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Hamilton Afb

## Other investigations on N1320X (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 DEN68F0266](https://openairdocs.org/ntsb/DEN68F0266), May 29, 1968: Bell 47G3B1 (N1320X), Capitan, NM, substantial damage
- [NTSB DEN68A0002](https://openairdocs.org/ntsb/DEN68A0002), Jul 6, 1967: Bell 47G3B1 (N1320X), Winston, NM, 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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