# NTSB MKC69F0037: Bensen B8M, N7520, Lake Winnebago, MO, June 2, 1968

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: June 2, 1968
- Place: Lake Winnebago, MO · LAKE WINNEBAGO, MO
- Location: 38.8211° N, 94.3623° W: Placed by OpenAirDocs: center of Lake Winnebago, MO, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.8211&lon=-94.3623&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report August 8, 1968
- Report: Brief approved by the director
- NTSB case key (mKey): 110350
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC69F0037
- Page: https://openairdocs.org/ntsb/MKC69F0037

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1806   68/6/2    LAKE WINNEBAGO,MO   BENSEN B8M          CR-  0  0  1  NONCOMMERCIAL             STUDENT, AGE 42, 14 TOTAL
        TIME - 1600                    N7520               PX-  0  0  0  PLEASURE/PERSONAL TRANSP  HOURS, ALL IN TYPE, NOT
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT - LAKE WINNEBAGO
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: INITIAL CLIMB
           COLLIDED WITH: TREES                                     LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: PISTON,PISTON RINGS
           MISCELLANEOUS ACTS,CONDITIONS - SCORED
           MISCELLANEOUS ACTS,CONDITIONS - EXCESSIVE TEMPERATURE
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- COOLING BAFFLES INSTALLED BY OWNER 20 MIN PRIOR ACCIDENT CAUSED ENG OVERHEATING.NO 3 PISTON SEIZED
```

## Aircraft

- Registration: [N7520](https://openairdocs.org/deregistered/N7520-1980-08-07), registration cancelled 1980-08-07, S/N FN-0072-1 (OpenAirDocs)
- Reported make and model: BENSEN B8M
- Registry model: [Bensen BN-8M-1](https://openairdocs.org/model/bensen-bn-8m-1) (registry code 130072G) (OpenAirDocs)
- Category: Gyroplane, amateur-built
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Lake Winnebago

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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