# NTSB CHI75FEC25: Bensen B-8M, N104RJ, Grosse Ile, MI, November 23, 1974

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: November 23, 1974
- Place: Grosse Ile, MI · GROSSE ILE, MI
- Location: 42.1292° N, 83.1444° W: Placed by OpenAirDocs: center of Grosse Ile, MI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.1292&lon=-83.1444&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report January 31, 1975
- Report: Brief approved by the director
- NTSB case key (mKey): 144455
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI75FEC25
- Page: https://openairdocs.org/ntsb/CHI75FEC25

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3989  74/11/23   GROSSE ILE,MICH     BENSEN B-8M         CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 31, 111
        TIME - 1408                    N104RJ              PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 44 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - GROSSE ILE
        DEPARTURE POINT             INTENDED DESTINATION
          GROSSE ILE,MICH             LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            LANDING: TRAFFIC PATTERN-CIRCLING
           DITCHING                                                 LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: CRANKSHAFT
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - AIRCRAFT CAME TO REST IN WATER
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON WATER
        REMARKS- MCCULLOCH ENG.CRANKSHAFT BROKE IN FRONT OF CRANK JOURNAL.
```

## Aircraft

- Registration: [N104RJ](https://openairdocs.org/deregistered/N104RJ-2009-09-21), registration cancelled 2009-09-21, S/N 363464059, built 1973 (OpenAirDocs)
- Reported make and model: BENSEN B-8M
- Registry model: [Jud B-8M](https://openairdocs.org/model/jud-b-8m) (registry code 1301094) (OpenAirDocs)
- Registry engine: [Mcculloch 4318A&E/0-100](https://openairdocs.org/engine/mcculloch-4318a-e-0-100) (registry code 43101, reciprocating) (OpenAirDocs)
- Category: Gyroplane, amateur-built
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Grosse Ile

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19741123039839A](https://openairdocs.org/incident/19741123039839A), Nov 23, 1974: Amtr 1301094, Grosse Ile, MI, Substantial damage. Mcculloch eng. Crankshaft broke in front of crank journal.

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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