# NTSB MKC72FER02: Bensen B-8M, N5680, Anoka, MN, July 3, 1971

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: July 3, 1971
- Place: Anoka, MN · ANOKA, MN
- Location: 45.2144° N, 93.3916° W: Placed by OpenAirDocs: center of Anoka, MN, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=45.2144&lon=-93.3916&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report December 9, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 162221
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC72FER02
- Page: https://openairdocs.org/ntsb/MKC72FER02

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0781   71/7/3    ANOKA,MINN          BENSEN B-8M         CR-  1  0  0  NONCOMMERCIAL             STUDENT, AGE 23, 12 TOTAL
        TIME - 1145                    N5680               PX-  0  0  0  PLEASURE/PERSONAL TRANSP  HOURS, 10 IN TYPE, NOT
                                       DAMAGE-DESTROYED    OT-  0  0  0                            INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          ANOKA,MINN                  LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           MISCELLANEOUS                                            IN FLIGHT: NORMAL CRUISE
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
           AIRFRAME - FLIGHT CONTROL SURFACES: RUDDER SURFACES,ATTACHMENTS
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        REMARKS- ROTOR BLDS CUT RUDDER OFF.ACFT MOD W CNVNTNL STICK CNTRL.PLT HAD 10 HR TIME IN THIS ACFT.
```

## Aircraft

- Registration: [N5680](https://openairdocs.org/deregistered/N5680-1971-10-04), registration cancelled 1971-10-04, S/N 1 (OpenAirDocs)
- Reported make and model: BENSEN B-8M
- Registry model: [Bensen B-8MVW](https://openairdocs.org/model/bensen-b-8mvw) (registry code 1300531) (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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