NTSB Identification: SEA86FA073.
The docket is stored on NTSB microfiche number 30714.
Accident occurred Friday, March 07, 1986 in SILETZ, OR
Aircraft: AEROSPATIALE SE 318C, registration: N4966
Injuries: 1 Fatal.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

THE PLT UNSUCCESSFULLY ATTEMPTED TO LIFT A 1597 LB LOAD OF CEDAR BLOCKS WHICH WOULD HAVE PLACED THE HELICOPTER APRX 880 LBS OVER ITS MAX GROSS WEIGHT WITH AN EXTERNAL LOAD. THE PLT WAS SETTING THE LOAD DOWN FOR GROUND PERSONNEL TO UNLOAD SOME OF THE BLOCKS WHEN A LOSS OF PWR OCCURRED. THE HELICOPTER THEN DESCENDED TO GROUND IMPACT WITH THE EXTERNAL LOAD LINE STILL ATTACHED. INSPECTION REVEALED THE ENG SUSTAINED A COMPRESSOR STALL AND THE TURBINE SECTION OF THE ENG HAD BEEN BURNED.

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

ENGINE ASSEMBLY..OTHER


Contributing Factors

TERRAIN CONDITION..MOUNTAINOUS/HILLY


Contributing Factors

IMPROPER USE OF EQUIPMENT/AIRCRAFT..PILOT IN COMMAND

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