# NTSB FTW70FPD05: Bell 47G, N16657, Fort Worth, TX, March 5, 1970

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: March 5, 1970
- Place: Fort Worth, TX · FORT WORTH, TX
- Location: 32.7254° N, 97.3208° W: Placed by OpenAirDocs: center of Fort Worth, TX, within about 11 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=32.7254&lon=-97.3208&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report July 27, 1970
- Report: Brief approved by the director
- NTSB case key (mKey): 140935
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW70FPD05
- Page: https://openairdocs.org/ntsb/FTW70FPD05

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0548   70/3/5    FORT WORTH,TEX      BELL 47G            CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 0910                    N16657              PX-  0  0  0  DUAL                      AGE 52, 7000 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            178 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - LUCK FIELD
        DEPARTURE POINT             INTENDED DESTINATION
          FORT WORTH,TEX              FORT WORTH,TEX
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      IN FLIGHT: DESCENDING
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: OTHER
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  PROP/ENGINE VIBRATION
                                  UNUSUAL NOISE
        REMARKS- SHEARED DELTA HINGE BOLT CAUSED FAILURE OF PITCH CONTROL BEARING.LOST T/R BLADE DUE TO VIBRATION.
```

## Aircraft

- Registration: [N16657](https://openairdocs.org/deregistered/N16657-2012-08-10), registration cancelled 2012-08-10, S/N K7124 (OpenAirDocs)
- Reported make and model: BELL 47G
- Registry model: [Bell-K-Copter 47G](https://openairdocs.org/model/bell-k-copter-47g) (registry code 1181065) (OpenAirDocs)
- Registry engine: [Franklin 6V4 series](https://openairdocs.org/engine/franklin-6v4-series) (registry code 27033, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Luck Field

## Other investigations on N16657 (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 FTW80FPM14](https://openairdocs.org/ntsb/FTW80FPM14), Jul 16, 1980: Bell 47G (N16657), Calvin, OK, destroyed, 1 fatal
- [NTSB FTW77FPM13](https://openairdocs.org/ntsb/FTW77FPM13), Jun 15, 1977: Bell 47G (N16657), Copan, OK, substantial damage
- [NTSB FTW69F0491](https://openairdocs.org/ntsb/FTW69F0491), May 2, 1969: Bell 47G (N16657), Fort Worth, TX, 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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