NTSB Identification: SEA84LA021.
The docket is stored on NTSB microfiche number 22016.
Accident occurred Tuesday, November 15, 1983 in HILLSBORO, OR
Aircraft: ENSTROM F28F, registration: N8622U
Injuries: 1 Minor,1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE ACFT DID A HARD LANDING DURING AUTOROTATION AFTER THE ENGINE RAN ROUGH AND QUIT AT 250 FT AGL DURING TAKEOFF. THE PILOT HAD LEANED THE MIXTURE, HE SAID, PRIOR TO TAKEOFF AND HE WAS NOT SURE IF HE PUSHED THE MIXTURE TO FULL RICH WHEN THE ENGINE STARTED TO MISS AND RUN ROUGH. DURING AUTOROTATION HE MAINTAINED 50 MPH WITH LITTLE FLARE FOR LANDING. THE ENGINE WAS CHECKED AFTER THE ACCIDENT AND OPERATED NORMALLY. THE MIXTURE WAS SLOWLY TURNED TO SEE HOW IT WOULD BE WHEN THE ENGINE RAN ROUGH. IT WAS ABOUT 3 INCHES FROM FULL RICH.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

MIXTURE..IMPROPER..PILOT IN COMMAND


Contributing Factors

AUTOROTATION..PERFORMED..PILOT IN COMMAND

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