# NTSB CHI68F0753: Enstrom F-28, N4462, Milwaukee, WI, May 10, 1968

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: May 10, 1968
- Place: Milwaukee, WI · MILWAUKEE, WI
- Location: 43.0389° N, 87.9065° W: Placed by OpenAirDocs: center of Milwaukee, WI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.0389&lon=-87.9065&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report September 23, 1968
- Report: Brief approved by the director
- NTSB case key (mKey): 110540
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI68F0753
- Page: https://openairdocs.org/ntsb/CHI68F0753

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2337  68/5/10    MILWAUKEE,WIS       ENSTROM F-28        CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 0745                    N4462               PX-  0  0  0  DUAL                      AGE 31, 7500 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            132 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - GENERAL MITCHELL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           ROTORCRAFT - ROTOR ASSEMBLIES: TAIL ROTOR BLADES
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- T/R ASSEMBLY SEPARATED DUE TO ROTOR SPINDLE FAILURE.LANDED WITH NO FURTHER DAMAGE.
```

## Aircraft

- Registration: N4462 (not matched to a registry record)
- Reported make and model: ENSTROM F-28
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: General Mitchell

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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