# NTSB SEA77DYK20: Enstrom F28C, N51727, Medford, WA, July 22, 1977

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 22, 1977
- Place: Medford, WA · MEDFORD, WA
- Phase of flight: [Emergency descent](https://openairdocs.org/ntsb-phases/600) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report September 7, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 146213
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA77DYK20
- Page: https://openairdocs.org/ntsb/SEA77DYK20

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2074  77/7/22  NR.MEDFORD,WA         ENSTROM F28C        CR-  0  0  2  INSTRUCTIONAL             ATP,FLIGHT INSTR., AGE
        TIME - 1330                    N51727              PX-  0  0  0  DUAL                      30, 4060 TOTAL HOURS, 55
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         MEDFORD,WA                   LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: AUTOROTATIVE DESCENT
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - FUEL SYSTEM: OTHER
           POWERPLANT - FUEL SYSTEM: LINES AND FITTINGS
           PILOT IN COMMAND - IMPROPER LEVEL OFF
        FACTOR(S)
           WEATHER - HIGH DENSITY ALTITUDE
           MISCELLANEOUS ACTS,CONDITIONS - SIMULATED CONDITIONS
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        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                                                      80
        WIND VELOCITY-KNOTS                                      TYPE OF WEATHER CONDITIONS
          CALM                                                     VFR
        TYPE OF FLIGHT PLAN
          NONE
        REMARKS- ENG QUIT DRG PRACTICE AUTOROTATION.SUSPECTED FUEL VAPORIZATION.SRVC LTR 0062 REFERS.STEEP FLARE.
```

## Aircraft

- Registration: [N51727](https://openairdocs.org/deregistered/N51727-2018-01-09), registration cancelled 2018-01-09, S/N 393, built 1977 (OpenAirDocs)
- Reported make and model: ENSTROM F28C
- 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

## 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 19770722020969A](https://openairdocs.org/incident/19770722020969A), Jul 22, 1977: Enstrm F28ENSTR/, Medford, OR, Substantial damage. Eng quit drg practice autorotation. Suspected fuel vaporization. Srvc ltr 0062 refers. Steep flare.

## Other investigations on N51727 (2)

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 WPR12LA111](https://openairdocs.org/ntsb/WPR12LA111), Feb 20, 2012: Enstrom F28 (N51727), Kalispell, MT, substantial damage. Probable cause: A total loss of engine power for reasons that could not be determined because postaccident examination did not reveal any anomalies that would have precluded normal operation.
- [NTSB ANC82DAG01](https://openairdocs.org/ntsb/ANC82DAG01), Oct 1, 1981: Enstrom F-28C (N51727), Big Lake, AK, 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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