# NTSB CHI72FEC02: Bensen B8M, N3450, Clio, MI, July 4, 1971

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: July 4, 1971
- Place: Clio, MI · CLIO, MI
- Location: 43.1770° N, 83.7356° W: Placed by OpenAirDocs: center of Clio, MI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.1770&lon=-83.7356&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report December 10, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 162225
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI72FEC02
- Page: https://openairdocs.org/ntsb/CHI72FEC02

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0898   71/7/4    CLIO,MICH           BENSEN B8M          CR-  1  0  0  NONCOMMERCIAL             NO CERTIFICATE, AGE 19, 9
        TIME - 1300                    N3450               PX-  0  0  0  PRACTICE                  TOTAL HOURS, ALL IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          CLIO,MICH                   LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           MISCELLANEOUS                                            LANDING: TRAFFIC PATTERN-CIRCLING
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - LACK OF FAMILIARITY WITH AIRCRAFT
        REMARKS- ACFT PORPOISED,ROTOR BLADES HIT RUDDER.
```

## Aircraft

- Registration: [N3450](https://openairdocs.org/deregistered/N3450-1971-09-23), registration cancelled 1971-09-23, S/N 1 (OpenAirDocs)
- Reported make and model: BENSEN B8M
- Registry model: [Mckeighan John J BENSON B-8M](https://openairdocs.org/model/mckeighan-john-j-benson-b-8m) (registry code 1302500) (OpenAirDocs)
- Category: Gyroplane, amateur-built
- Engines: reciprocating
- Damage: Destroyed

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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