N6708D

THE PILOT'S LANDING HARD. A CONTRIBUTING FACTOR IN THIS ACCIDENT WAS THE AIRCRAFT EMITTING A VIBRATION FROM AN UNKNOWN SOURCE.

WHILE FLYING, THE PILOT FELT A VIBRATION AND HE PERFORMED A PRECAUTIONARY LANDING. THE PILOT LANDED THE AIRCRAFT HARD. THE AIRCRAFT WAS REMOVED WITHOUT NTSB AUTHORIZATION AND CONSEQUENTLY IT COULD NOT BE EXAMINED. THE PILOT DID NOT PROVIDE THE NTSB A COMPLETED 'AIRCRAFT ACCIDENT REPORT' FORM 6120.1. THE ORIGIN OF THE REPORTED VIBRATION WAS NOT DETERMINED.

---------------------------------------------------------------------------------------------------------------------------- FILE DATE LOCATION AIRCRAFT DATA INJURIES FLIGHT PILOT DATA F S M/N PURPOSE ---------------------------------------------------------------------------------------------------------------------------- 3-3879 73/12/30 NR.STRATFORD,TEX BELL 47G-2 CR- 0 0 1 NONCOMMERCIAL COMMERCIAL, AGE 38, 1150 TIME - 1605 N6708D PX- 0 0 2 PLEASURE/PERSONAL TRANSP TOTAL HOURS, 50 IN TYPE, DAMAGE-SUBSTANTIAL OT- 0 0 0 INSTRUMENT RATED. DEPARTURE POINT INTENDED DESTINATION STRATFORD,TEX AMARILLO,TEX TYPE OF ACCIDENT PHASE OF OPERATION ENGINE FAILURE OR MALFUNCTION IN FLIGHT: NORMAL CRUISE HARD LANDING LANDING: POWER-OFF AUTOROTATIVE LANDING PROBABLE CAUSE(S) POWERPLANT - ENGINE CONTROLS: THROTTLE-POWER LEVER ASSEMBLIES MISCELLANEOUS ACTS,CONDITIONS - FROZEN, MOISTURE PILOT IN COMMAND - MISJUDGED SPEED AND ALTITUDE PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS FACTOR(S) WEATHER - ICING CONDITIONS-INCLUDES SLEET,FREEZING RAIN,ETC. PILOT IN COMMAND - ATTEMPTED OPERATION BEYOND EXPERIENCE/ABILITY LEVEL WEATHER BRIEFING - BRIEFED BY FLIGHT SERVICE PERSONNEL, BY PHONE WEATHER FORECAST - UNKNOWN/NOT REPORTED EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND SKY CONDITION CEILING AT ACCIDENT SITE OVERCAST 1200 VISIBILITY AT ACCIDENT SITE PRECIPITATION AT ACCIDENT SITE 5 OR OVER(UNLIMITED) NONE OBSTRUCTIONS TO VISION AT ACCIDENT SITE TEMPERATURE-F NONE 25 WIND DIRECTION-DEGREES WIND VELOCITY-KNOTS 360 4 TYPE OF WEATHER CONDITIONS TYPE OF FLIGHT PLAN VFR NONE REMARKS- THROTTLE CABLE FROZE IN OPEN PSN,TEMP 25 DEG.PLT CUT MAGS & AUTOROTATED.WASNT ROTOR CRAFT RATED.

---------------------------------------------------------------------------------------------------------------------------- FILE DATE LOCATION AIRCRAFT DATA INJURIES FLIGHT PILOT DATA F S M/N PURPOSE ---------------------------------------------------------------------------------------------------------------------------- 3-2646 69/8/27 NR.PRUDHOE BAY,ALAS BELL 47G-2 CR- 0 0 1 COMMERCIAL COMMERCIAL, AGE 25, 1700 TIME - 0930 N6708D PX- 0 0 1 AIR TAXI-PASSG TOTAL HOURS, 510 IN TYPE, DAMAGE-SUBSTANTIAL OT- 0 0 0 NOT INSTRUMENT RATED. NAME OF AIRPORT - KAD RIVER DEPARTURE POINT INTENDED DESTINATION PRUDHOE BAY,ALAS UNKNOWN/NOT REPORTED TYPE OF ACCIDENT PHASE OF OPERATION ENGINE FAILURE OR MALFUNCTION TAKEOFF: INITIAL CLIMB HARD LANDING LANDING: POWER-ON LANDING PROBABLE CAUSE(S) PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING MISCELLANEOUS ACTS,CONDITIONS - WATER IN FUEL PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT.

---------------------------------------------------------------------------------------------------------------------------- FILE DATE LOCATION AIRCRAFT DATA INJURIES FLIGHT PILOT DATA F S M/N PURPOSE ---------------------------------------------------------------------------------------------------------------------------- 3-0043 69/3/4 CHUGIAK,ALAS BELL 47G-2 CR- 0 0 1 COMMERCIAL COMMERCIAL, AGE 50, 13300 TIME - 1015 N6708D PX- 0 0 2 AIR TAXI-PASSG TOTAL HOURS, 2130 IN DAMAGE-SUBSTANTIAL OT- 0 0 0 TYPE, NOT INSTRUMENT RATED. TYPE OF ACCIDENT PHASE OF OPERATION ROLL OVER LANDING: POWER-ON LANDING PROBABLE CAUSE(S) PILOT IN COMMAND - SELECTED UNSUITABLE TERRAIN TERRAIN - SNOW-COVERED REMARKS- SNOW PAD EQUIPPED SKIDS.RT SKID BROKE THROUGH SNOW CRUST.

---------------------------------------------------------------------------------------------------------------------------- FILE DATE LOCATION AIRCRAFT DATA INJURIES FLIGHT PILOT DATA F S M/N PURPOSE ---------------------------------------------------------------------------------------------------------------------------- 3-4371 68/7/25 NR.MINCHUMINA,ALAS BELL 47G-2 CR- 0 0 1 COMMERCIAL COMMERCIAL, FL.INSTR., TIME - 1115 N6708D PX- 0 0 1 ASSOC FIRE CTL ACTIVITY AGE 36, 5200 TOTAL HOURS, DAMAGE-SUBSTANTIAL OT- 0 0 0 800 IN TYPE, NOT INSTRUMENT RATED. TYPE OF ACCIDENT PHASE OF OPERATION ENGINE FAILURE OR MALFUNCTION TAKEOFF: INITIAL CLIMB HARD LANDING LANDING: POWER-OFF AUTOROTATIVE LANDING PROBABLE CAUSE(S) POWERPLANT - MISCELLANEOUS: POWERPLANT FAILURE FOR UNDETERMINED REASONS PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND

---------------------------------------------------------------------------------------------------------------------------- FILE DATE LOCATION AIRCRAFT DATA INJURIES FLIGHT PILOT DATA F S M/N PURPOSE ---------------------------------------------------------------------------------------------------------------------------- 2-0783 64/10/18 KING SALMON ALAS BELL 47G2 CR- 0 0 1 COMMERCIAL COMMERCIAL, AGE 40, 7600 TIME - 1730 N6708D PX- 0 0 1 MAPPING/PHOTO TOTAL HOURS, 1900 IN DAMAGE-SUBSTANTIAL OT- 0 0 0 TYPE, NOT INSTRUMENT RATED. NAME OF AIRPORT - KING SALMON TYPE OF ACCIDENT PHASE OF OPERATION COLLIDED WITH: AUTOMOBILE STATIC: IDLING ROTORS PROBABLE CAUSE(S) PILOT IN COMMAND - MISJUDGED CLEARANCE