# NTSB CHI67A0074: Bensen B8-M, N24133, Dowagiac, MI, December 12, 1966

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: December 12, 1966
- Place: Dowagiac, MI · DOWAGIAC, MI
- Location: 41.9834° N, 86.1128° W: Placed by OpenAirDocs: center of Dowagiac, MI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.9834&lon=-86.1128&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report December 11, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 120126
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI67A0074
- Page: https://openairdocs.org/ntsb/CHI67A0074

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-1174  66/12/12   DOWAGIAC MICH       BENSEN B8-M         CR-  1  0  0  NONCOMMERCIAL             STUDENT, AGE 44, 18 TOTAL
        TIME - 1530                    N24133              PX-  0  0  0  PLEASURE/PERSONAL TRANSP  HOURS, UNK/NR IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            UNK/NR INSTRUMENT RATED.
        NAME OF AIRPORT - CASS COUNTY
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: MAIN ROTOR                      IN FLIGHT: NORMAL CRUISE
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           ROTORCRAFT - ROTOR ASSEMBLIES: MAIN ROTOR BLADES
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        REMARKS- IT WAS NOTED THAT THE LDG GR WAS MORE RIGID THAN DESIGN INSTRUCTIONS SPECIFIED.BLADE FAILD DOWNWRD
```

## Aircraft

- Registration: [N24133](https://openairdocs.org/deregistered/N24133-1967-11-14), registration cancelled 1967-11-14, S/N OWB-7 (OpenAirDocs)
- Reported make and model: BENSEN B8-M
- Registry model: [Benson GYROCOPTER](https://openairdocs.org/model/benson-gyrocopter) (registry code 13006QR) (OpenAirDocs)
- Category: Gyroplane, amateur-built
- Engines: reciprocating
- Damage: Destroyed
- Airport: Cass County

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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