NTSB Identification: Unknown
14 CFR Part 135 Nonscheduled operation of NATIONAL HELIC
Aircraft: BELL 47J2A, registration: N1141W----------------------------------------------------------------------------------------------------------------------------
FILE DATE LOCATION AIRCRAFT DATA INJURIES FLIGHT PILOT DATA
F S M/N PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-1033 64/10/8 BODEGA BAY CALIF BELL 47J2A CR- 0 1 0 COMMERCIAL COMMERCIAL, FL.INSTR.,
TIME - 1515 N1141W PX- 0 3 0 AIR TAXI-PASSG AGE 34, 9627 TOTAL HOURS,
DAMAGE-SUBSTANTIAL OT- 0 0 0 4 IN TYPE, NOT INSTRUMENT
RATED.
NAME OF AIRPORT - SHELL CO.HELIPORT
TYPE OF ACCIDENT PHASE OF OPERATION
ENGINE FAILURE OR MALFUNCTION TAKEOFF: INITIAL CLIMB
HARD LANDING LANDING: POWER-OFF AUTOROTATIVE LANDING
PROBABLE CAUSE(S)
ROTORCFT-FAILURE MAIN ROTOR DRIVING FLANGE SCREWS
MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
MISCELLANEOUS ACTS,CONDITIONS - SHEARED
FACTOR(S)
PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
ROTORCRAFT - MISCELLANEOUS UNITS AND ASSEMBLIES: DUAL TACHOMETER
TERRAIN - ROUGH/UNEVEN
EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
REMARKS- ERRONEOUS ROTOR TACHOMETER DURING AUTOROTATION.
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