# NTSB DEN76FTC29: Enstrom F-28C, N539H, Evanston, WY, April 8, 1976

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 8, 1976
- Place: Evanston, WY · EVANSTON, WY
- Location: 41.2594° N, 110.9643° W: Placed by OpenAirDocs: center of Evanston, WY, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.2594&lon=-110.9643&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report September 8, 1976
- Report: Brief approved by the director
- NTSB case key (mKey): 153609
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN76FTC29
- Page: https://openairdocs.org/ntsb/DEN76FTC29

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2114   76/4/8  NR.EVANSTON,WY        ENSTROM F-28C       CR-  0  0  1  NONCOMMERCIAL             ATP,FLIGHT INSTR., AGE
        TIME - 0715                    N539H               PX-  0  0  2  CORP/EXEC                 28, 2962 TOTAL HOURS, 155
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            IN TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - LANDING AREA
        DEPARTURE POINT             INTENDED DESTINATION
         EVANSTON,WY                  LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           HARD LANDING                                             LANDING: ROLL-ON/RUN-ON
           GEAR COLLAPSED                                           LANDING: ROLL-ON/RUN-ON
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
        FACTOR(S)
           WEATHER - LOW CEILING
           WEATHER - HIGH DENSITY ALTITUDE
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        WEATHER BRIEFING - NO RECORD OF BRIEFING RECEIVED
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          OVERCAST                                                  200
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          1 MILE OR LESS                                           NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  RELATIVE BEARING OF WIND
          GROUND FOG                                               LIGHT AND VARIABLE
        TEMPERATURE-F                                            TYPE OF WEATHER CONDITIONS
           40                                                      VFR
        TYPE OF FLIGHT PLAN
          NONE
        REMARKS- DENSITY ALT 7000FT.WIND LIGHT.APPROACH MADE ON A SLIGHT DOWNSLOPE ROUTE.
```

## Aircraft

- Registration: [N539H](https://openairdocs.org/aircraft/N539H), registered now, S/N 334, built 1976 (OpenAirDocs)
- Reported make and model: ENSTROM F-28C
- Registry model: [Enstrom F-28C](https://openairdocs.org/model/enstrom-f-28c) (registry code 3300407) (OpenAirDocs)
- Registry engine: [Lycoming I0360 series](https://openairdocs.org/engine/lycoming-i0360-series) (registry code 41515, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Landing Area

## 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 19760408010649A](https://openairdocs.org/incident/19760408010649A), Apr 8, 1976: Enstrm F28C, Evanston, WY, Substantial damage. Density alt 7000FT.wind light. Approach made on a slight downslope route.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.