# NTSB MKC76DER77: Enstron F-28, N625H, Ortonville, MN, July 4, 1976

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: July 4, 1976
- Place: Ortonville, MN · ORTONVILLE, MN
- Location: 45.3024° N, 96.4422° W: Placed by OpenAirDocs: center of Ortonville, MN, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=45.3024&lon=-96.4422&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor, 1 uninjured
- Status: Completed, report November 11, 1976
- Report: Brief approved by the director
- NTSB case key (mKey): 154590
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC76DER77
- Page: https://openairdocs.org/ntsb/MKC76DER77

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2864   76/7/4    ORTONVILLE,MN       ENSTRON F-28        CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, AGE 28, 1777
        TIME - 1630                    N625H               PX-  0  0  1  FERRY                     TOTAL HOURS, 15 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - ORTONVILLE MUNI
        DEPARTURE POINT             INTENDED DESTINATION
          ORTONVILLE,MN               PORTLAND,OR
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           NOSE OVER/DOWN                                           TAKEOFF: OTHER
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
           PILOT IN COMMAND - SELECTED WRONG RUNWAY RELATIVE TO EXISTING WIND
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - DOWNWIND
        REMARKS- TKOF DNWND ALLOWED ROTOR RPM TO DETERIORATE.ACFT T/D SIDEWAYS.
```

## Aircraft

- Registration: [N625H](https://openairdocs.org/deregistered/N625H-2017-04-04), registration cancelled 2017-04-04, S/N 346, built 1976 (OpenAirDocs)
- Reported make and model: ENSTRON F-28
- Registry model: [Enstrom F-28C](https://openairdocs.org/model/enstrom-f-28c) (registry code 3300407) (OpenAirDocs)
- Registry engine: [Lycoming HIO-360 series](https://openairdocs.org/engine/lycoming-hio-360-series) (registry code 41524, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Ortonville Muni

## 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 19760704020619A](https://openairdocs.org/incident/19760704020619A), Jul 4, 1976: Enstrm F28ENSTR*, Ortonville, MN, Substantial damage. Tkof dnwnd allowed rotor RPM to deteriorate. Acft t/d sideways.

## Other investigations on N625H (1)

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.

- [NTSB DEN93LA070](https://openairdocs.org/ntsb/DEN93LA070), Jun 27, 1993: Enstrom F-28C (N625H), Boulder, CO, substantial damage. Probable cause: A FAILURE BY THE PILOT FLYING TO ADEQUATELY COMPENSATE FOR WIND CONDITIONS WHICH LED TO A LOSS OF TAIL ROTOR CONTROL. A FACTOR WAS: INADEQUATE SUPERVISION BY THE PILOT IN COMMAND.

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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