# NTSB SEA77FTI15: Enstrom 280C, N594H, Dillon, MT, July 7, 1977

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 7, 1977
- Place: Dillon, MT · DILLON, MT
- Location: 45.2181° N, 112.6345° W: Placed by OpenAirDocs: center of Dillon, MT, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=45.2181&lon=-112.6345&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report August 30, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 146678
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA77FTI15
- Page: https://openairdocs.org/ntsb/SEA77FTI15

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1663   77/7/7    DILLON,MT           ENSTROM 280C        CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, FL.INSTR.,
        TIME - 1100                    N594H               PX-  0  0  1  PLEASURE/PERSONAL TRANSP  AGE 30, 3031 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            60 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          DILLON,MT                   LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: TREES                                     IN FLIGHT: CLIMB TO CRUISE
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER IN-FLIGHT DECISIONS OR PLANNING
           PILOT IN COMMAND - IMPROPER OPERATION OF POWERPLANT & POWERPLANT CONTROLS
        FACTOR(S)
           WEATHER - HIGH DENSITY ALTITUDE
           TERRAIN - HIGH OBSTRUCTIONS
        WEATHER BRIEFING - NO RECORD OF BRIEFING RECEIVED
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          CLEAR                                                    UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      50
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          120                                                       5
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
        REMARKS- CLIMBED THRU TREES WHILE ADJUSTING PWR TO IMPROVE PERFORMANCE.DENS ALT 8800FT.
```

## Aircraft

- Registration: [N594H](https://openairdocs.org/aircraft/N594H), registered now, S/N 1074, built 1977 (OpenAirDocs)
- Reported make and model: ENSTROM 280C
- Registry model: [Enstrom Helicopter 280C](https://openairdocs.org/model/enstrom-helicopter-280c) (registry code 3300505) (OpenAirDocs)
- Registry engine: [Lycoming HI0-360 series](https://openairdocs.org/engine/lycoming-hi0-360-series) (registry code 41553, turbo-shaft) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N594H (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 CHI77FA032](https://openairdocs.org/ntsb/CHI77FA032), Feb 25, 1977: Enstrom 280C (N594H), Valparaiso, IN, substantial damage

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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