# NTSB CHI74AC078: Enstrom F-28A, N9592, Superior, WI, March 24, 1974

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: March 24, 1974
- Place: Superior, WI · SUPERIOR, WI
- Location: 46.7208° N, 92.1041° W: Placed by OpenAirDocs: center of Superior, WI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=46.7208&lon=-92.1041&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal, 2 serious
- Status: Completed, report June 5, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 186328
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI74AC078
- Page: https://openairdocs.org/ntsb/CHI74AC078

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0839  74/3/24    SUPERIOR,WIS        ENSTROM F-28A       CR-  1  0  0  NONCOMMERCIAL             COMMERCIAL, AGE 28, 740
        TIME - 1530                    N9592               PX-  0  2  0  BUSINESS                  TOTAL HOURS, 81 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          DULUTH,MINN                 LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: WIRES/POLES                               IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO SEE AND AVOID OBJECTS OR OBSTRUCTIONS
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - UNWARRANTED LOW FLYING
           TERRAIN - HIGH OBSTRUCTIONS
        REMARKS- HIT ELECTRICAL PWR LINES,FLIPPED OVER.
```

## Aircraft

- Registration: [N9592](https://openairdocs.org/deregistered/N9592-1989-03-16), registration cancelled 1989-03-16, S/N 129 (OpenAirDocs)
- Reported make and model: ENSTROM F-28A
- Registry model: [Enstrom F-28A](https://openairdocs.org/model/enstrom-f-28a) (registry code 3300406) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## 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 19740324012999A](https://openairdocs.org/incident/19740324012999A), Mar 24, 1974: Enstrm F28A, Superior, WI, Substantial damage. Hit electrical pwr lines,flipped over.

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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